mirror of
https://gitlab.gnome.org/GNOME/glib.git
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16ee50a592
gio/goutputstream.c: In function ‘g_output_stream_real_writev’:
gio/goutputstream.c:2347:15: error: comparison of integer expressions of different signedness: ‘gssize’ {aka ‘long int’} and ‘gsize’ {aka ‘const long unsigned int’}
2347 | if (res < vectors[i].size)
| ^
3005 lines
95 KiB
C
3005 lines
95 KiB
C
/* GIO - GLib Input, Output and Streaming Library
|
||
*
|
||
* Copyright (C) 2006-2007 Red Hat, Inc.
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||
*
|
||
* This library is free software; you can redistribute it and/or
|
||
* modify it under the terms of the GNU Lesser General Public
|
||
* License as published by the Free Software Foundation; either
|
||
* version 2.1 of the License, or (at your option) any later version.
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||
*
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||
* This library is distributed in the hope that it will be useful,
|
||
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
||
* Lesser General Public License for more details.
|
||
*
|
||
* You should have received a copy of the GNU Lesser General
|
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* Public License along with this library; if not, see <http://www.gnu.org/licenses/>.
|
||
*
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||
* Author: Alexander Larsson <alexl@redhat.com>
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||
*/
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||
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#include "config.h"
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||
#include <string.h>
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||
#include "goutputstream.h"
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||
#include "gcancellable.h"
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||
#include "gasyncresult.h"
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#include "gtask.h"
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#include "ginputstream.h"
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#include "gioerror.h"
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||
#include "gioprivate.h"
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||
#include "glibintl.h"
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#include "gpollableoutputstream.h"
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||
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||
/**
|
||
* SECTION:goutputstream
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* @short_description: Base class for implementing streaming output
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* @include: gio/gio.h
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||
*
|
||
* #GOutputStream has functions to write to a stream (g_output_stream_write()),
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||
* to close a stream (g_output_stream_close()) and to flush pending writes
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||
* (g_output_stream_flush()).
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||
*
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||
* To copy the content of an input stream to an output stream without
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* manually handling the reads and writes, use g_output_stream_splice().
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||
*
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||
* See the documentation for #GIOStream for details of thread safety of
|
||
* streaming APIs.
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||
*
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||
* All of these functions have async variants too.
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||
**/
|
||
|
||
struct _GOutputStreamPrivate {
|
||
guint closed : 1;
|
||
guint pending : 1;
|
||
guint closing : 1;
|
||
GAsyncReadyCallback outstanding_callback;
|
||
};
|
||
|
||
G_DEFINE_ABSTRACT_TYPE_WITH_PRIVATE (GOutputStream, g_output_stream, G_TYPE_OBJECT)
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||
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||
static gssize g_output_stream_real_splice (GOutputStream *stream,
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||
GInputStream *source,
|
||
GOutputStreamSpliceFlags flags,
|
||
GCancellable *cancellable,
|
||
GError **error);
|
||
static void g_output_stream_real_write_async (GOutputStream *stream,
|
||
const void *buffer,
|
||
gsize count,
|
||
int io_priority,
|
||
GCancellable *cancellable,
|
||
GAsyncReadyCallback callback,
|
||
gpointer data);
|
||
static gssize g_output_stream_real_write_finish (GOutputStream *stream,
|
||
GAsyncResult *result,
|
||
GError **error);
|
||
static gboolean g_output_stream_real_writev (GOutputStream *stream,
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||
const GOutputVector *vectors,
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||
gsize n_vectors,
|
||
gsize *bytes_written,
|
||
GCancellable *cancellable,
|
||
GError **error);
|
||
static void g_output_stream_real_writev_async (GOutputStream *stream,
|
||
const GOutputVector *vectors,
|
||
gsize n_vectors,
|
||
int io_priority,
|
||
GCancellable *cancellable,
|
||
GAsyncReadyCallback callback,
|
||
gpointer data);
|
||
static gboolean g_output_stream_real_writev_finish (GOutputStream *stream,
|
||
GAsyncResult *result,
|
||
gsize *bytes_written,
|
||
GError **error);
|
||
static void g_output_stream_real_splice_async (GOutputStream *stream,
|
||
GInputStream *source,
|
||
GOutputStreamSpliceFlags flags,
|
||
int io_priority,
|
||
GCancellable *cancellable,
|
||
GAsyncReadyCallback callback,
|
||
gpointer data);
|
||
static gssize g_output_stream_real_splice_finish (GOutputStream *stream,
|
||
GAsyncResult *result,
|
||
GError **error);
|
||
static void g_output_stream_real_flush_async (GOutputStream *stream,
|
||
int io_priority,
|
||
GCancellable *cancellable,
|
||
GAsyncReadyCallback callback,
|
||
gpointer data);
|
||
static gboolean g_output_stream_real_flush_finish (GOutputStream *stream,
|
||
GAsyncResult *result,
|
||
GError **error);
|
||
static void g_output_stream_real_close_async (GOutputStream *stream,
|
||
int io_priority,
|
||
GCancellable *cancellable,
|
||
GAsyncReadyCallback callback,
|
||
gpointer data);
|
||
static gboolean g_output_stream_real_close_finish (GOutputStream *stream,
|
||
GAsyncResult *result,
|
||
GError **error);
|
||
static gboolean g_output_stream_internal_close (GOutputStream *stream,
|
||
GCancellable *cancellable,
|
||
GError **error);
|
||
static void g_output_stream_internal_close_async (GOutputStream *stream,
|
||
int io_priority,
|
||
GCancellable *cancellable,
|
||
GAsyncReadyCallback callback,
|
||
gpointer data);
|
||
static gboolean g_output_stream_internal_close_finish (GOutputStream *stream,
|
||
GAsyncResult *result,
|
||
GError **error);
|
||
|
||
static void
|
||
g_output_stream_dispose (GObject *object)
|
||
{
|
||
GOutputStream *stream;
|
||
|
||
stream = G_OUTPUT_STREAM (object);
|
||
|
||
if (!stream->priv->closed)
|
||
g_output_stream_close (stream, NULL, NULL);
|
||
|
||
G_OBJECT_CLASS (g_output_stream_parent_class)->dispose (object);
|
||
}
|
||
|
||
static void
|
||
g_output_stream_class_init (GOutputStreamClass *klass)
|
||
{
|
||
GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
|
||
|
||
gobject_class->dispose = g_output_stream_dispose;
|
||
|
||
klass->splice = g_output_stream_real_splice;
|
||
|
||
klass->write_async = g_output_stream_real_write_async;
|
||
klass->write_finish = g_output_stream_real_write_finish;
|
||
klass->writev_fn = g_output_stream_real_writev;
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klass->writev_async = g_output_stream_real_writev_async;
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||
klass->writev_finish = g_output_stream_real_writev_finish;
|
||
klass->splice_async = g_output_stream_real_splice_async;
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||
klass->splice_finish = g_output_stream_real_splice_finish;
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||
klass->flush_async = g_output_stream_real_flush_async;
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||
klass->flush_finish = g_output_stream_real_flush_finish;
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||
klass->close_async = g_output_stream_real_close_async;
|
||
klass->close_finish = g_output_stream_real_close_finish;
|
||
}
|
||
|
||
static void
|
||
g_output_stream_init (GOutputStream *stream)
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||
{
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||
stream->priv = g_output_stream_get_instance_private (stream);
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||
}
|
||
|
||
/**
|
||
* g_output_stream_write:
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* @stream: a #GOutputStream.
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||
* @buffer: (array length=count) (element-type guint8): the buffer containing the data to write.
|
||
* @count: the number of bytes to write
|
||
* @cancellable: (nullable): optional cancellable object
|
||
* @error: location to store the error occurring, or %NULL to ignore
|
||
*
|
||
* Tries to write @count bytes from @buffer into the stream. Will block
|
||
* during the operation.
|
||
*
|
||
* If count is 0, returns 0 and does nothing. A value of @count
|
||
* larger than %G_MAXSSIZE will cause a %G_IO_ERROR_INVALID_ARGUMENT error.
|
||
*
|
||
* On success, the number of bytes written to the stream is returned.
|
||
* It is not an error if this is not the same as the requested size, as it
|
||
* can happen e.g. on a partial I/O error, or if there is not enough
|
||
* storage in the stream. All writes block until at least one byte
|
||
* is written or an error occurs; 0 is never returned (unless
|
||
* @count is 0).
|
||
*
|
||
* If @cancellable is not %NULL, then the operation can be cancelled by
|
||
* triggering the cancellable object from another thread. If the operation
|
||
* was cancelled, the error %G_IO_ERROR_CANCELLED will be returned. If an
|
||
* operation was partially finished when the operation was cancelled the
|
||
* partial result will be returned, without an error.
|
||
*
|
||
* On error -1 is returned and @error is set accordingly.
|
||
*
|
||
* Virtual: write_fn
|
||
*
|
||
* Returns: Number of bytes written, or -1 on error
|
||
**/
|
||
gssize
|
||
g_output_stream_write (GOutputStream *stream,
|
||
const void *buffer,
|
||
gsize count,
|
||
GCancellable *cancellable,
|
||
GError **error)
|
||
{
|
||
GOutputStreamClass *class;
|
||
gssize res;
|
||
|
||
g_return_val_if_fail (G_IS_OUTPUT_STREAM (stream), -1);
|
||
g_return_val_if_fail (buffer != NULL, 0);
|
||
|
||
if (count == 0)
|
||
return 0;
|
||
|
||
if (((gssize) count) < 0)
|
||
{
|
||
g_set_error (error, G_IO_ERROR, G_IO_ERROR_INVALID_ARGUMENT,
|
||
_("Too large count value passed to %s"), G_STRFUNC);
|
||
return -1;
|
||
}
|
||
|
||
class = G_OUTPUT_STREAM_GET_CLASS (stream);
|
||
|
||
if (class->write_fn == NULL)
|
||
{
|
||
g_set_error_literal (error, G_IO_ERROR, G_IO_ERROR_NOT_SUPPORTED,
|
||
_("Output stream doesn’t implement write"));
|
||
return -1;
|
||
}
|
||
|
||
if (!g_output_stream_set_pending (stream, error))
|
||
return -1;
|
||
|
||
if (cancellable)
|
||
g_cancellable_push_current (cancellable);
|
||
|
||
res = class->write_fn (stream, buffer, count, cancellable, error);
|
||
|
||
if (cancellable)
|
||
g_cancellable_pop_current (cancellable);
|
||
|
||
g_output_stream_clear_pending (stream);
|
||
|
||
return res;
|
||
}
|
||
|
||
/**
|
||
* g_output_stream_write_all:
|
||
* @stream: a #GOutputStream.
|
||
* @buffer: (array length=count) (element-type guint8): the buffer containing the data to write.
|
||
* @count: the number of bytes to write
|
||
* @bytes_written: (out) (optional): location to store the number of bytes that was
|
||
* written to the stream
|
||
* @cancellable: (nullable): optional #GCancellable object, %NULL to ignore.
|
||
* @error: location to store the error occurring, or %NULL to ignore
|
||
*
|
||
* Tries to write @count bytes from @buffer into the stream. Will block
|
||
* during the operation.
|
||
*
|
||
* This function is similar to g_output_stream_write(), except it tries to
|
||
* write as many bytes as requested, only stopping on an error.
|
||
*
|
||
* On a successful write of @count bytes, %TRUE is returned, and @bytes_written
|
||
* is set to @count.
|
||
*
|
||
* If there is an error during the operation %FALSE is returned and @error
|
||
* is set to indicate the error status.
|
||
*
|
||
* As a special exception to the normal conventions for functions that
|
||
* use #GError, if this function returns %FALSE (and sets @error) then
|
||
* @bytes_written will be set to the number of bytes that were
|
||
* successfully written before the error was encountered. This
|
||
* functionality is only available from C. If you need it from another
|
||
* language then you must write your own loop around
|
||
* g_output_stream_write().
|
||
*
|
||
* Returns: %TRUE on success, %FALSE if there was an error
|
||
**/
|
||
gboolean
|
||
g_output_stream_write_all (GOutputStream *stream,
|
||
const void *buffer,
|
||
gsize count,
|
||
gsize *bytes_written,
|
||
GCancellable *cancellable,
|
||
GError **error)
|
||
{
|
||
gsize _bytes_written;
|
||
gssize res;
|
||
|
||
g_return_val_if_fail (G_IS_OUTPUT_STREAM (stream), FALSE);
|
||
g_return_val_if_fail (buffer != NULL, FALSE);
|
||
|
||
_bytes_written = 0;
|
||
while (_bytes_written < count)
|
||
{
|
||
res = g_output_stream_write (stream, (char *)buffer + _bytes_written, count - _bytes_written,
|
||
cancellable, error);
|
||
if (res == -1)
|
||
{
|
||
if (bytes_written)
|
||
*bytes_written = _bytes_written;
|
||
return FALSE;
|
||
}
|
||
g_return_val_if_fail (res > 0, FALSE);
|
||
|
||
_bytes_written += res;
|
||
}
|
||
|
||
if (bytes_written)
|
||
*bytes_written = _bytes_written;
|
||
|
||
return TRUE;
|
||
}
|
||
|
||
/**
|
||
* g_output_stream_writev:
|
||
* @stream: a #GOutputStream.
|
||
* @vectors: (array length=n_vectors): the buffer containing the #GOutputVectors to write.
|
||
* @n_vectors: the number of vectors to write
|
||
* @bytes_written: (out) (optional): location to store the number of bytes that were
|
||
* written to the stream
|
||
* @cancellable: (nullable): optional cancellable object
|
||
* @error: location to store the error occurring, or %NULL to ignore
|
||
*
|
||
* Tries to write the bytes contained in the @n_vectors @vectors into the
|
||
* stream. Will block during the operation.
|
||
*
|
||
* If @n_vectors is 0 or the sum of all bytes in @vectors is 0, returns 0 and
|
||
* does nothing.
|
||
*
|
||
* On success, the number of bytes written to the stream is returned.
|
||
* It is not an error if this is not the same as the requested size, as it
|
||
* can happen e.g. on a partial I/O error, or if there is not enough
|
||
* storage in the stream. All writes block until at least one byte
|
||
* is written or an error occurs; 0 is never returned (unless
|
||
* @n_vectors is 0 or the sum of all bytes in @vectors is 0).
|
||
*
|
||
* If @cancellable is not %NULL, then the operation can be cancelled by
|
||
* triggering the cancellable object from another thread. If the operation
|
||
* was cancelled, the error %G_IO_ERROR_CANCELLED will be returned. If an
|
||
* operation was partially finished when the operation was cancelled the
|
||
* partial result will be returned, without an error.
|
||
*
|
||
* Some implementations of g_output_stream_writev() may have limitations on the
|
||
* aggregate buffer size, and will return %G_IO_ERROR_INVALID_ARGUMENT if these
|
||
* are exceeded. For example, when writing to a local file on UNIX platforms,
|
||
* the aggregate buffer size must not exceed %G_MAXSSIZE bytes.
|
||
*
|
||
* Virtual: writev_fn
|
||
*
|
||
* Returns: %TRUE on success, %FALSE if there was an error
|
||
*
|
||
* Since: 2.60
|
||
*/
|
||
gboolean
|
||
g_output_stream_writev (GOutputStream *stream,
|
||
const GOutputVector *vectors,
|
||
gsize n_vectors,
|
||
gsize *bytes_written,
|
||
GCancellable *cancellable,
|
||
GError **error)
|
||
{
|
||
GOutputStreamClass *class;
|
||
gboolean res;
|
||
gsize _bytes_written = 0;
|
||
|
||
if (bytes_written)
|
||
*bytes_written = 0;
|
||
|
||
g_return_val_if_fail (G_IS_OUTPUT_STREAM (stream), FALSE);
|
||
g_return_val_if_fail (vectors != NULL || n_vectors == 0, FALSE);
|
||
g_return_val_if_fail (cancellable == NULL || G_IS_CANCELLABLE (cancellable), FALSE);
|
||
g_return_val_if_fail (error == NULL || *error == NULL, FALSE);
|
||
|
||
if (n_vectors == 0)
|
||
return TRUE;
|
||
|
||
class = G_OUTPUT_STREAM_GET_CLASS (stream);
|
||
|
||
g_return_val_if_fail (class->writev_fn != NULL, FALSE);
|
||
|
||
if (!g_output_stream_set_pending (stream, error))
|
||
return FALSE;
|
||
|
||
if (cancellable)
|
||
g_cancellable_push_current (cancellable);
|
||
|
||
res = class->writev_fn (stream, vectors, n_vectors, &_bytes_written, cancellable, error);
|
||
|
||
g_warn_if_fail (res || _bytes_written == 0);
|
||
g_warn_if_fail (res || (error == NULL || *error != NULL));
|
||
|
||
if (cancellable)
|
||
g_cancellable_pop_current (cancellable);
|
||
|
||
g_output_stream_clear_pending (stream);
|
||
|
||
if (bytes_written)
|
||
*bytes_written = _bytes_written;
|
||
|
||
return res;
|
||
}
|
||
|
||
/**
|
||
* g_output_stream_writev_all:
|
||
* @stream: a #GOutputStream.
|
||
* @vectors: (array length=n_vectors): the buffer containing the #GOutputVectors to write.
|
||
* @n_vectors: the number of vectors to write
|
||
* @bytes_written: (out) (optional): location to store the number of bytes that were
|
||
* written to the stream
|
||
* @cancellable: (nullable): optional #GCancellable object, %NULL to ignore.
|
||
* @error: location to store the error occurring, or %NULL to ignore
|
||
*
|
||
* Tries to write the bytes contained in the @n_vectors @vectors into the
|
||
* stream. Will block during the operation.
|
||
*
|
||
* This function is similar to g_output_stream_writev(), except it tries to
|
||
* write as many bytes as requested, only stopping on an error.
|
||
*
|
||
* On a successful write of all @n_vectors vectors, %TRUE is returned, and
|
||
* @bytes_written is set to the sum of all the sizes of @vectors.
|
||
*
|
||
* If there is an error during the operation %FALSE is returned and @error
|
||
* is set to indicate the error status.
|
||
*
|
||
* As a special exception to the normal conventions for functions that
|
||
* use #GError, if this function returns %FALSE (and sets @error) then
|
||
* @bytes_written will be set to the number of bytes that were
|
||
* successfully written before the error was encountered. This
|
||
* functionality is only available from C. If you need it from another
|
||
* language then you must write your own loop around
|
||
* g_output_stream_write().
|
||
*
|
||
* The content of the individual elements of @vectors might be changed by this
|
||
* function.
|
||
*
|
||
* Returns: %TRUE on success, %FALSE if there was an error
|
||
*
|
||
* Since: 2.60
|
||
*/
|
||
gboolean
|
||
g_output_stream_writev_all (GOutputStream *stream,
|
||
GOutputVector *vectors,
|
||
gsize n_vectors,
|
||
gsize *bytes_written,
|
||
GCancellable *cancellable,
|
||
GError **error)
|
||
{
|
||
gsize _bytes_written = 0;
|
||
gsize i, to_be_written = 0;
|
||
|
||
if (bytes_written)
|
||
*bytes_written = 0;
|
||
|
||
g_return_val_if_fail (G_IS_OUTPUT_STREAM (stream), FALSE);
|
||
g_return_val_if_fail (vectors != NULL || n_vectors == 0, FALSE);
|
||
g_return_val_if_fail (cancellable == NULL || G_IS_CANCELLABLE (cancellable), FALSE);
|
||
g_return_val_if_fail (error == NULL || *error == NULL, FALSE);
|
||
|
||
/* We can't write more than G_MAXSIZE bytes overall, otherwise we
|
||
* would overflow the bytes_written counter */
|
||
for (i = 0; i < n_vectors; i++)
|
||
{
|
||
if (to_be_written > G_MAXSIZE - vectors[i].size)
|
||
{
|
||
g_set_error (error, G_IO_ERROR, G_IO_ERROR_INVALID_ARGUMENT,
|
||
_("Sum of vectors passed to %s too large"), G_STRFUNC);
|
||
return FALSE;
|
||
}
|
||
to_be_written += vectors[i].size;
|
||
}
|
||
|
||
_bytes_written = 0;
|
||
while (n_vectors > 0 && to_be_written > 0)
|
||
{
|
||
gsize n_written = 0;
|
||
gboolean res;
|
||
|
||
res = g_output_stream_writev (stream, vectors, n_vectors, &n_written, cancellable, error);
|
||
|
||
if (!res)
|
||
{
|
||
if (bytes_written)
|
||
*bytes_written = _bytes_written;
|
||
return FALSE;
|
||
}
|
||
|
||
g_return_val_if_fail (n_written > 0, FALSE);
|
||
_bytes_written += n_written;
|
||
|
||
/* skip vectors that have been written in full */
|
||
while (n_vectors > 0 && n_written >= vectors[0].size)
|
||
{
|
||
n_written -= vectors[0].size;
|
||
++vectors;
|
||
--n_vectors;
|
||
}
|
||
/* skip partially written vector data */
|
||
if (n_written > 0 && n_vectors > 0)
|
||
{
|
||
vectors[0].size -= n_written;
|
||
vectors[0].buffer = ((guint8 *) vectors[0].buffer) + n_written;
|
||
}
|
||
}
|
||
|
||
if (bytes_written)
|
||
*bytes_written = _bytes_written;
|
||
|
||
return TRUE;
|
||
}
|
||
|
||
/**
|
||
* g_output_stream_printf:
|
||
* @stream: a #GOutputStream.
|
||
* @bytes_written: (out) (optional): location to store the number of bytes that was
|
||
* written to the stream
|
||
* @cancellable: (nullable): optional #GCancellable object, %NULL to ignore.
|
||
* @error: location to store the error occurring, or %NULL to ignore
|
||
* @format: the format string. See the printf() documentation
|
||
* @...: the parameters to insert into the format string
|
||
*
|
||
* This is a utility function around g_output_stream_write_all(). It
|
||
* uses g_strdup_vprintf() to turn @format and @... into a string that
|
||
* is then written to @stream.
|
||
*
|
||
* See the documentation of g_output_stream_write_all() about the
|
||
* behavior of the actual write operation.
|
||
*
|
||
* Note that partial writes cannot be properly checked with this
|
||
* function due to the variable length of the written string, if you
|
||
* need precise control over partial write failures, you need to
|
||
* create you own printf()-like wrapper around g_output_stream_write()
|
||
* or g_output_stream_write_all().
|
||
*
|
||
* Since: 2.40
|
||
*
|
||
* Returns: %TRUE on success, %FALSE if there was an error
|
||
**/
|
||
gboolean
|
||
g_output_stream_printf (GOutputStream *stream,
|
||
gsize *bytes_written,
|
||
GCancellable *cancellable,
|
||
GError **error,
|
||
const gchar *format,
|
||
...)
|
||
{
|
||
va_list args;
|
||
gboolean success;
|
||
|
||
va_start (args, format);
|
||
success = g_output_stream_vprintf (stream, bytes_written, cancellable,
|
||
error, format, args);
|
||
va_end (args);
|
||
|
||
return success;
|
||
}
|
||
|
||
/**
|
||
* g_output_stream_vprintf:
|
||
* @stream: a #GOutputStream.
|
||
* @bytes_written: (out) (optional): location to store the number of bytes that was
|
||
* written to the stream
|
||
* @cancellable: (nullable): optional #GCancellable object, %NULL to ignore.
|
||
* @error: location to store the error occurring, or %NULL to ignore
|
||
* @format: the format string. See the printf() documentation
|
||
* @args: the parameters to insert into the format string
|
||
*
|
||
* This is a utility function around g_output_stream_write_all(). It
|
||
* uses g_strdup_vprintf() to turn @format and @args into a string that
|
||
* is then written to @stream.
|
||
*
|
||
* See the documentation of g_output_stream_write_all() about the
|
||
* behavior of the actual write operation.
|
||
*
|
||
* Note that partial writes cannot be properly checked with this
|
||
* function due to the variable length of the written string, if you
|
||
* need precise control over partial write failures, you need to
|
||
* create you own printf()-like wrapper around g_output_stream_write()
|
||
* or g_output_stream_write_all().
|
||
*
|
||
* Since: 2.40
|
||
*
|
||
* Returns: %TRUE on success, %FALSE if there was an error
|
||
**/
|
||
gboolean
|
||
g_output_stream_vprintf (GOutputStream *stream,
|
||
gsize *bytes_written,
|
||
GCancellable *cancellable,
|
||
GError **error,
|
||
const gchar *format,
|
||
va_list args)
|
||
{
|
||
gchar *text;
|
||
gboolean success;
|
||
|
||
g_return_val_if_fail (G_IS_OUTPUT_STREAM (stream), FALSE);
|
||
g_return_val_if_fail (cancellable == NULL || G_IS_CANCELLABLE (cancellable), FALSE);
|
||
g_return_val_if_fail (error == NULL || *error == NULL, FALSE);
|
||
g_return_val_if_fail (format != NULL, FALSE);
|
||
|
||
text = g_strdup_vprintf (format, args);
|
||
success = g_output_stream_write_all (stream,
|
||
text, strlen (text),
|
||
bytes_written, cancellable, error);
|
||
g_free (text);
|
||
|
||
return success;
|
||
}
|
||
|
||
/**
|
||
* g_output_stream_write_bytes:
|
||
* @stream: a #GOutputStream.
|
||
* @bytes: the #GBytes to write
|
||
* @cancellable: (nullable): optional cancellable object
|
||
* @error: location to store the error occurring, or %NULL to ignore
|
||
*
|
||
* A wrapper function for g_output_stream_write() which takes a
|
||
* #GBytes as input. This can be more convenient for use by language
|
||
* bindings or in other cases where the refcounted nature of #GBytes
|
||
* is helpful over a bare pointer interface.
|
||
*
|
||
* However, note that this function may still perform partial writes,
|
||
* just like g_output_stream_write(). If that occurs, to continue
|
||
* writing, you will need to create a new #GBytes containing just the
|
||
* remaining bytes, using g_bytes_new_from_bytes(). Passing the same
|
||
* #GBytes instance multiple times potentially can result in duplicated
|
||
* data in the output stream.
|
||
*
|
||
* Returns: Number of bytes written, or -1 on error
|
||
**/
|
||
gssize
|
||
g_output_stream_write_bytes (GOutputStream *stream,
|
||
GBytes *bytes,
|
||
GCancellable *cancellable,
|
||
GError **error)
|
||
{
|
||
gsize size;
|
||
gconstpointer data;
|
||
|
||
data = g_bytes_get_data (bytes, &size);
|
||
|
||
return g_output_stream_write (stream,
|
||
data, size,
|
||
cancellable,
|
||
error);
|
||
}
|
||
|
||
/**
|
||
* g_output_stream_flush:
|
||
* @stream: a #GOutputStream.
|
||
* @cancellable: (nullable): optional cancellable object
|
||
* @error: location to store the error occurring, or %NULL to ignore
|
||
*
|
||
* Forces a write of all user-space buffered data for the given
|
||
* @stream. Will block during the operation. Closing the stream will
|
||
* implicitly cause a flush.
|
||
*
|
||
* This function is optional for inherited classes.
|
||
*
|
||
* If @cancellable is not %NULL, then the operation can be cancelled by
|
||
* triggering the cancellable object from another thread. If the operation
|
||
* was cancelled, the error %G_IO_ERROR_CANCELLED will be returned.
|
||
*
|
||
* Returns: %TRUE on success, %FALSE on error
|
||
**/
|
||
gboolean
|
||
g_output_stream_flush (GOutputStream *stream,
|
||
GCancellable *cancellable,
|
||
GError **error)
|
||
{
|
||
GOutputStreamClass *class;
|
||
gboolean res;
|
||
|
||
g_return_val_if_fail (G_IS_OUTPUT_STREAM (stream), FALSE);
|
||
|
||
if (!g_output_stream_set_pending (stream, error))
|
||
return FALSE;
|
||
|
||
class = G_OUTPUT_STREAM_GET_CLASS (stream);
|
||
|
||
res = TRUE;
|
||
if (class->flush)
|
||
{
|
||
if (cancellable)
|
||
g_cancellable_push_current (cancellable);
|
||
|
||
res = class->flush (stream, cancellable, error);
|
||
|
||
if (cancellable)
|
||
g_cancellable_pop_current (cancellable);
|
||
}
|
||
|
||
g_output_stream_clear_pending (stream);
|
||
|
||
return res;
|
||
}
|
||
|
||
/**
|
||
* g_output_stream_splice:
|
||
* @stream: a #GOutputStream.
|
||
* @source: a #GInputStream.
|
||
* @flags: a set of #GOutputStreamSpliceFlags.
|
||
* @cancellable: (nullable): optional #GCancellable object, %NULL to ignore.
|
||
* @error: a #GError location to store the error occurring, or %NULL to
|
||
* ignore.
|
||
*
|
||
* Splices an input stream into an output stream.
|
||
*
|
||
* Returns: a #gssize containing the size of the data spliced, or
|
||
* -1 if an error occurred. Note that if the number of bytes
|
||
* spliced is greater than %G_MAXSSIZE, then that will be
|
||
* returned, and there is no way to determine the actual number
|
||
* of bytes spliced.
|
||
**/
|
||
gssize
|
||
g_output_stream_splice (GOutputStream *stream,
|
||
GInputStream *source,
|
||
GOutputStreamSpliceFlags flags,
|
||
GCancellable *cancellable,
|
||
GError **error)
|
||
{
|
||
GOutputStreamClass *class;
|
||
gssize bytes_copied;
|
||
|
||
g_return_val_if_fail (G_IS_OUTPUT_STREAM (stream), -1);
|
||
g_return_val_if_fail (G_IS_INPUT_STREAM (source), -1);
|
||
|
||
if (g_input_stream_is_closed (source))
|
||
{
|
||
g_set_error_literal (error, G_IO_ERROR, G_IO_ERROR_CLOSED,
|
||
_("Source stream is already closed"));
|
||
return -1;
|
||
}
|
||
|
||
if (!g_output_stream_set_pending (stream, error))
|
||
return -1;
|
||
|
||
class = G_OUTPUT_STREAM_GET_CLASS (stream);
|
||
|
||
if (cancellable)
|
||
g_cancellable_push_current (cancellable);
|
||
|
||
bytes_copied = class->splice (stream, source, flags, cancellable, error);
|
||
|
||
if (cancellable)
|
||
g_cancellable_pop_current (cancellable);
|
||
|
||
g_output_stream_clear_pending (stream);
|
||
|
||
return bytes_copied;
|
||
}
|
||
|
||
static gssize
|
||
g_output_stream_real_splice (GOutputStream *stream,
|
||
GInputStream *source,
|
||
GOutputStreamSpliceFlags flags,
|
||
GCancellable *cancellable,
|
||
GError **error)
|
||
{
|
||
GOutputStreamClass *class = G_OUTPUT_STREAM_GET_CLASS (stream);
|
||
gssize n_read, n_written;
|
||
gsize bytes_copied;
|
||
char buffer[8192], *p;
|
||
gboolean res;
|
||
|
||
bytes_copied = 0;
|
||
if (class->write_fn == NULL)
|
||
{
|
||
g_set_error_literal (error, G_IO_ERROR, G_IO_ERROR_NOT_SUPPORTED,
|
||
_("Output stream doesn’t implement write"));
|
||
res = FALSE;
|
||
goto notsupported;
|
||
}
|
||
|
||
res = TRUE;
|
||
do
|
||
{
|
||
n_read = g_input_stream_read (source, buffer, sizeof (buffer), cancellable, error);
|
||
if (n_read == -1)
|
||
{
|
||
res = FALSE;
|
||
break;
|
||
}
|
||
|
||
if (n_read == 0)
|
||
break;
|
||
|
||
p = buffer;
|
||
while (n_read > 0)
|
||
{
|
||
n_written = class->write_fn (stream, p, n_read, cancellable, error);
|
||
if (n_written == -1)
|
||
{
|
||
res = FALSE;
|
||
break;
|
||
}
|
||
|
||
p += n_written;
|
||
n_read -= n_written;
|
||
bytes_copied += n_written;
|
||
}
|
||
|
||
if (bytes_copied > G_MAXSSIZE)
|
||
bytes_copied = G_MAXSSIZE;
|
||
}
|
||
while (res);
|
||
|
||
notsupported:
|
||
if (!res)
|
||
error = NULL; /* Ignore further errors */
|
||
|
||
if (flags & G_OUTPUT_STREAM_SPLICE_CLOSE_SOURCE)
|
||
{
|
||
/* Don't care about errors in source here */
|
||
g_input_stream_close (source, cancellable, NULL);
|
||
}
|
||
|
||
if (flags & G_OUTPUT_STREAM_SPLICE_CLOSE_TARGET)
|
||
{
|
||
/* But write errors on close are bad! */
|
||
if (!g_output_stream_internal_close (stream, cancellable, error))
|
||
res = FALSE;
|
||
}
|
||
|
||
if (res)
|
||
return bytes_copied;
|
||
|
||
return -1;
|
||
}
|
||
|
||
/* Must always be called inside
|
||
* g_output_stream_set_pending()/g_output_stream_clear_pending(). */
|
||
static gboolean
|
||
g_output_stream_internal_close (GOutputStream *stream,
|
||
GCancellable *cancellable,
|
||
GError **error)
|
||
{
|
||
GOutputStreamClass *class;
|
||
gboolean res;
|
||
|
||
if (stream->priv->closed)
|
||
return TRUE;
|
||
|
||
class = G_OUTPUT_STREAM_GET_CLASS (stream);
|
||
|
||
stream->priv->closing = TRUE;
|
||
|
||
if (cancellable)
|
||
g_cancellable_push_current (cancellable);
|
||
|
||
if (class->flush)
|
||
res = class->flush (stream, cancellable, error);
|
||
else
|
||
res = TRUE;
|
||
|
||
if (!res)
|
||
{
|
||
/* flushing caused the error that we want to return,
|
||
* but we still want to close the underlying stream if possible
|
||
*/
|
||
if (class->close_fn)
|
||
class->close_fn (stream, cancellable, NULL);
|
||
}
|
||
else
|
||
{
|
||
res = TRUE;
|
||
if (class->close_fn)
|
||
res = class->close_fn (stream, cancellable, error);
|
||
}
|
||
|
||
if (cancellable)
|
||
g_cancellable_pop_current (cancellable);
|
||
|
||
stream->priv->closing = FALSE;
|
||
stream->priv->closed = TRUE;
|
||
|
||
return res;
|
||
}
|
||
|
||
/**
|
||
* g_output_stream_close:
|
||
* @stream: A #GOutputStream.
|
||
* @cancellable: (nullable): optional cancellable object
|
||
* @error: location to store the error occurring, or %NULL to ignore
|
||
*
|
||
* Closes the stream, releasing resources related to it.
|
||
*
|
||
* Once the stream is closed, all other operations will return %G_IO_ERROR_CLOSED.
|
||
* Closing a stream multiple times will not return an error.
|
||
*
|
||
* Closing a stream will automatically flush any outstanding buffers in the
|
||
* stream.
|
||
*
|
||
* Streams will be automatically closed when the last reference
|
||
* is dropped, but you might want to call this function to make sure
|
||
* resources are released as early as possible.
|
||
*
|
||
* Some streams might keep the backing store of the stream (e.g. a file descriptor)
|
||
* open after the stream is closed. See the documentation for the individual
|
||
* stream for details.
|
||
*
|
||
* On failure the first error that happened will be reported, but the close
|
||
* operation will finish as much as possible. A stream that failed to
|
||
* close will still return %G_IO_ERROR_CLOSED for all operations. Still, it
|
||
* is important to check and report the error to the user, otherwise
|
||
* there might be a loss of data as all data might not be written.
|
||
*
|
||
* If @cancellable is not %NULL, then the operation can be cancelled by
|
||
* triggering the cancellable object from another thread. If the operation
|
||
* was cancelled, the error %G_IO_ERROR_CANCELLED will be returned.
|
||
* Cancelling a close will still leave the stream closed, but there some streams
|
||
* can use a faster close that doesn't block to e.g. check errors. On
|
||
* cancellation (as with any error) there is no guarantee that all written
|
||
* data will reach the target.
|
||
*
|
||
* Returns: %TRUE on success, %FALSE on failure
|
||
**/
|
||
gboolean
|
||
g_output_stream_close (GOutputStream *stream,
|
||
GCancellable *cancellable,
|
||
GError **error)
|
||
{
|
||
gboolean res;
|
||
|
||
g_return_val_if_fail (G_IS_OUTPUT_STREAM (stream), FALSE);
|
||
|
||
if (stream->priv->closed)
|
||
return TRUE;
|
||
|
||
if (!g_output_stream_set_pending (stream, error))
|
||
return FALSE;
|
||
|
||
res = g_output_stream_internal_close (stream, cancellable, error);
|
||
|
||
g_output_stream_clear_pending (stream);
|
||
|
||
return res;
|
||
}
|
||
|
||
static void
|
||
async_ready_write_callback_wrapper (GObject *source_object,
|
||
GAsyncResult *res,
|
||
gpointer user_data)
|
||
{
|
||
GOutputStream *stream = G_OUTPUT_STREAM (source_object);
|
||
GOutputStreamClass *class;
|
||
GTask *task = user_data;
|
||
gssize nwrote;
|
||
GError *error = NULL;
|
||
|
||
g_output_stream_clear_pending (stream);
|
||
|
||
if (g_async_result_legacy_propagate_error (res, &error))
|
||
nwrote = -1;
|
||
else
|
||
{
|
||
class = G_OUTPUT_STREAM_GET_CLASS (stream);
|
||
nwrote = class->write_finish (stream, res, &error);
|
||
}
|
||
|
||
if (nwrote >= 0)
|
||
g_task_return_int (task, nwrote);
|
||
else
|
||
g_task_return_error (task, error);
|
||
g_object_unref (task);
|
||
}
|
||
|
||
/**
|
||
* g_output_stream_write_async:
|
||
* @stream: A #GOutputStream.
|
||
* @buffer: (array length=count) (element-type guint8): the buffer containing the data to write.
|
||
* @count: the number of bytes to write
|
||
* @io_priority: the io priority of the request.
|
||
* @cancellable: (nullable): optional #GCancellable object, %NULL to ignore.
|
||
* @callback: (scope async): callback to call when the request is satisfied
|
||
* @user_data: (closure): the data to pass to callback function
|
||
*
|
||
* Request an asynchronous write of @count bytes from @buffer into
|
||
* the stream. When the operation is finished @callback will be called.
|
||
* You can then call g_output_stream_write_finish() to get the result of the
|
||
* operation.
|
||
*
|
||
* During an async request no other sync and async calls are allowed,
|
||
* and will result in %G_IO_ERROR_PENDING errors.
|
||
*
|
||
* A value of @count larger than %G_MAXSSIZE will cause a
|
||
* %G_IO_ERROR_INVALID_ARGUMENT error.
|
||
*
|
||
* On success, the number of bytes written will be passed to the
|
||
* @callback. It is not an error if this is not the same as the
|
||
* requested size, as it can happen e.g. on a partial I/O error,
|
||
* but generally we try to write as many bytes as requested.
|
||
*
|
||
* You are guaranteed that this method will never fail with
|
||
* %G_IO_ERROR_WOULD_BLOCK - if @stream can't accept more data, the
|
||
* method will just wait until this changes.
|
||
*
|
||
* Any outstanding I/O request with higher priority (lower numerical
|
||
* value) will be executed before an outstanding request with lower
|
||
* priority. Default priority is %G_PRIORITY_DEFAULT.
|
||
*
|
||
* The asynchronous methods have a default fallback that uses threads
|
||
* to implement asynchronicity, so they are optional for inheriting
|
||
* classes. However, if you override one you must override all.
|
||
*
|
||
* For the synchronous, blocking version of this function, see
|
||
* g_output_stream_write().
|
||
*
|
||
* Note that no copy of @buffer will be made, so it must stay valid
|
||
* until @callback is called. See g_output_stream_write_bytes_async()
|
||
* for a #GBytes version that will automatically hold a reference to
|
||
* the contents (without copying) for the duration of the call.
|
||
*/
|
||
void
|
||
g_output_stream_write_async (GOutputStream *stream,
|
||
const void *buffer,
|
||
gsize count,
|
||
int io_priority,
|
||
GCancellable *cancellable,
|
||
GAsyncReadyCallback callback,
|
||
gpointer user_data)
|
||
{
|
||
GOutputStreamClass *class;
|
||
GError *error = NULL;
|
||
GTask *task;
|
||
|
||
g_return_if_fail (G_IS_OUTPUT_STREAM (stream));
|
||
g_return_if_fail (buffer != NULL);
|
||
|
||
task = g_task_new (stream, cancellable, callback, user_data);
|
||
g_task_set_source_tag (task, g_output_stream_write_async);
|
||
g_task_set_priority (task, io_priority);
|
||
|
||
if (count == 0)
|
||
{
|
||
g_task_return_int (task, 0);
|
||
g_object_unref (task);
|
||
return;
|
||
}
|
||
|
||
if (((gssize) count) < 0)
|
||
{
|
||
g_task_return_new_error (task, G_IO_ERROR, G_IO_ERROR_INVALID_ARGUMENT,
|
||
_("Too large count value passed to %s"),
|
||
G_STRFUNC);
|
||
g_object_unref (task);
|
||
return;
|
||
}
|
||
|
||
if (!g_output_stream_set_pending (stream, &error))
|
||
{
|
||
g_task_return_error (task, error);
|
||
g_object_unref (task);
|
||
return;
|
||
}
|
||
|
||
class = G_OUTPUT_STREAM_GET_CLASS (stream);
|
||
|
||
class->write_async (stream, buffer, count, io_priority, cancellable,
|
||
async_ready_write_callback_wrapper, task);
|
||
}
|
||
|
||
/**
|
||
* g_output_stream_write_finish:
|
||
* @stream: a #GOutputStream.
|
||
* @result: a #GAsyncResult.
|
||
* @error: a #GError location to store the error occurring, or %NULL to
|
||
* ignore.
|
||
*
|
||
* Finishes a stream write operation.
|
||
*
|
||
* Returns: a #gssize containing the number of bytes written to the stream.
|
||
**/
|
||
gssize
|
||
g_output_stream_write_finish (GOutputStream *stream,
|
||
GAsyncResult *result,
|
||
GError **error)
|
||
{
|
||
g_return_val_if_fail (G_IS_OUTPUT_STREAM (stream), FALSE);
|
||
g_return_val_if_fail (g_task_is_valid (result, stream), FALSE);
|
||
g_return_val_if_fail (g_async_result_is_tagged (result, g_output_stream_write_async), FALSE);
|
||
|
||
/* @result is always the GTask created by g_output_stream_write_async();
|
||
* we called class->write_finish() from async_ready_write_callback_wrapper.
|
||
*/
|
||
return g_task_propagate_int (G_TASK (result), error);
|
||
}
|
||
|
||
typedef struct
|
||
{
|
||
const guint8 *buffer;
|
||
gsize to_write;
|
||
gsize bytes_written;
|
||
} AsyncWriteAll;
|
||
|
||
static void
|
||
free_async_write_all (gpointer data)
|
||
{
|
||
g_slice_free (AsyncWriteAll, data);
|
||
}
|
||
|
||
static void
|
||
write_all_callback (GObject *stream,
|
||
GAsyncResult *result,
|
||
gpointer user_data)
|
||
{
|
||
GTask *task = user_data;
|
||
AsyncWriteAll *data = g_task_get_task_data (task);
|
||
|
||
if (result)
|
||
{
|
||
GError *error = NULL;
|
||
gssize nwritten;
|
||
|
||
nwritten = g_output_stream_write_finish (G_OUTPUT_STREAM (stream), result, &error);
|
||
|
||
if (nwritten == -1)
|
||
{
|
||
g_task_return_error (task, error);
|
||
g_object_unref (task);
|
||
return;
|
||
}
|
||
|
||
g_assert_cmpint (nwritten, <=, data->to_write);
|
||
g_warn_if_fail (nwritten > 0);
|
||
|
||
data->to_write -= nwritten;
|
||
data->bytes_written += nwritten;
|
||
}
|
||
|
||
if (data->to_write == 0)
|
||
{
|
||
g_task_return_boolean (task, TRUE);
|
||
g_object_unref (task);
|
||
}
|
||
else
|
||
g_output_stream_write_async (G_OUTPUT_STREAM (stream),
|
||
data->buffer + data->bytes_written,
|
||
data->to_write,
|
||
g_task_get_priority (task),
|
||
g_task_get_cancellable (task),
|
||
write_all_callback, task);
|
||
}
|
||
|
||
static void
|
||
write_all_async_thread (GTask *task,
|
||
gpointer source_object,
|
||
gpointer task_data,
|
||
GCancellable *cancellable)
|
||
{
|
||
GOutputStream *stream = source_object;
|
||
AsyncWriteAll *data = task_data;
|
||
GError *error = NULL;
|
||
|
||
if (g_output_stream_write_all (stream, data->buffer, data->to_write, &data->bytes_written,
|
||
g_task_get_cancellable (task), &error))
|
||
g_task_return_boolean (task, TRUE);
|
||
else
|
||
g_task_return_error (task, error);
|
||
}
|
||
|
||
/**
|
||
* g_output_stream_write_all_async:
|
||
* @stream: A #GOutputStream
|
||
* @buffer: (array length=count) (element-type guint8): the buffer containing the data to write
|
||
* @count: the number of bytes to write
|
||
* @io_priority: the io priority of the request
|
||
* @cancellable: (nullable): optional #GCancellable object, %NULL to ignore
|
||
* @callback: (scope async): callback to call when the request is satisfied
|
||
* @user_data: (closure): the data to pass to callback function
|
||
*
|
||
* Request an asynchronous write of @count bytes from @buffer into
|
||
* the stream. When the operation is finished @callback will be called.
|
||
* You can then call g_output_stream_write_all_finish() to get the result of the
|
||
* operation.
|
||
*
|
||
* This is the asynchronous version of g_output_stream_write_all().
|
||
*
|
||
* Call g_output_stream_write_all_finish() to collect the result.
|
||
*
|
||
* Any outstanding I/O request with higher priority (lower numerical
|
||
* value) will be executed before an outstanding request with lower
|
||
* priority. Default priority is %G_PRIORITY_DEFAULT.
|
||
*
|
||
* Note that no copy of @buffer will be made, so it must stay valid
|
||
* until @callback is called.
|
||
*
|
||
* Since: 2.44
|
||
*/
|
||
void
|
||
g_output_stream_write_all_async (GOutputStream *stream,
|
||
const void *buffer,
|
||
gsize count,
|
||
int io_priority,
|
||
GCancellable *cancellable,
|
||
GAsyncReadyCallback callback,
|
||
gpointer user_data)
|
||
{
|
||
AsyncWriteAll *data;
|
||
GTask *task;
|
||
|
||
g_return_if_fail (G_IS_OUTPUT_STREAM (stream));
|
||
g_return_if_fail (buffer != NULL || count == 0);
|
||
|
||
task = g_task_new (stream, cancellable, callback, user_data);
|
||
data = g_slice_new0 (AsyncWriteAll);
|
||
data->buffer = buffer;
|
||
data->to_write = count;
|
||
|
||
g_task_set_source_tag (task, g_output_stream_write_all_async);
|
||
g_task_set_task_data (task, data, free_async_write_all);
|
||
g_task_set_priority (task, io_priority);
|
||
|
||
/* If async writes are going to be handled via the threadpool anyway
|
||
* then we may as well do it with a single dispatch instead of
|
||
* bouncing in and out.
|
||
*/
|
||
if (g_output_stream_async_write_is_via_threads (stream))
|
||
{
|
||
g_task_run_in_thread (task, write_all_async_thread);
|
||
g_object_unref (task);
|
||
}
|
||
else
|
||
write_all_callback (G_OBJECT (stream), NULL, task);
|
||
}
|
||
|
||
/**
|
||
* g_output_stream_write_all_finish:
|
||
* @stream: a #GOutputStream
|
||
* @result: a #GAsyncResult
|
||
* @bytes_written: (out) (optional): location to store the number of bytes that was written to the stream
|
||
* @error: a #GError location to store the error occurring, or %NULL to ignore.
|
||
*
|
||
* Finishes an asynchronous stream write operation started with
|
||
* g_output_stream_write_all_async().
|
||
*
|
||
* As a special exception to the normal conventions for functions that
|
||
* use #GError, if this function returns %FALSE (and sets @error) then
|
||
* @bytes_written will be set to the number of bytes that were
|
||
* successfully written before the error was encountered. This
|
||
* functionality is only available from C. If you need it from another
|
||
* language then you must write your own loop around
|
||
* g_output_stream_write_async().
|
||
*
|
||
* Returns: %TRUE on success, %FALSE if there was an error
|
||
*
|
||
* Since: 2.44
|
||
**/
|
||
gboolean
|
||
g_output_stream_write_all_finish (GOutputStream *stream,
|
||
GAsyncResult *result,
|
||
gsize *bytes_written,
|
||
GError **error)
|
||
{
|
||
GTask *task;
|
||
|
||
g_return_val_if_fail (G_IS_OUTPUT_STREAM (stream), FALSE);
|
||
g_return_val_if_fail (g_task_is_valid (result, stream), FALSE);
|
||
|
||
task = G_TASK (result);
|
||
|
||
if (bytes_written)
|
||
{
|
||
AsyncWriteAll *data = (AsyncWriteAll *)g_task_get_task_data (task);
|
||
|
||
*bytes_written = data->bytes_written;
|
||
}
|
||
|
||
return g_task_propagate_boolean (task, error);
|
||
}
|
||
|
||
/**
|
||
* g_output_stream_writev_async:
|
||
* @stream: A #GOutputStream.
|
||
* @vectors: (array length=n_vectors): the buffer containing the #GOutputVectors to write.
|
||
* @n_vectors: the number of vectors to write
|
||
* @io_priority: the I/O priority of the request.
|
||
* @cancellable: (nullable): optional #GCancellable object, %NULL to ignore.
|
||
* @callback: (scope async): callback to call when the request is satisfied
|
||
* @user_data: (closure): the data to pass to callback function
|
||
*
|
||
* Request an asynchronous write of the bytes contained in @n_vectors @vectors into
|
||
* the stream. When the operation is finished @callback will be called.
|
||
* You can then call g_output_stream_writev_finish() to get the result of the
|
||
* operation.
|
||
*
|
||
* During an async request no other sync and async calls are allowed,
|
||
* and will result in %G_IO_ERROR_PENDING errors.
|
||
*
|
||
* On success, the number of bytes written will be passed to the
|
||
* @callback. It is not an error if this is not the same as the
|
||
* requested size, as it can happen e.g. on a partial I/O error,
|
||
* but generally we try to write as many bytes as requested.
|
||
*
|
||
* You are guaranteed that this method will never fail with
|
||
* %G_IO_ERROR_WOULD_BLOCK — if @stream can't accept more data, the
|
||
* method will just wait until this changes.
|
||
*
|
||
* Any outstanding I/O request with higher priority (lower numerical
|
||
* value) will be executed before an outstanding request with lower
|
||
* priority. Default priority is %G_PRIORITY_DEFAULT.
|
||
*
|
||
* The asynchronous methods have a default fallback that uses threads
|
||
* to implement asynchronicity, so they are optional for inheriting
|
||
* classes. However, if you override one you must override all.
|
||
*
|
||
* For the synchronous, blocking version of this function, see
|
||
* g_output_stream_writev().
|
||
*
|
||
* Note that no copy of @vectors will be made, so it must stay valid
|
||
* until @callback is called.
|
||
*
|
||
* Since: 2.60
|
||
*/
|
||
void
|
||
g_output_stream_writev_async (GOutputStream *stream,
|
||
const GOutputVector *vectors,
|
||
gsize n_vectors,
|
||
int io_priority,
|
||
GCancellable *cancellable,
|
||
GAsyncReadyCallback callback,
|
||
gpointer user_data)
|
||
{
|
||
GOutputStreamClass *class;
|
||
|
||
g_return_if_fail (G_IS_OUTPUT_STREAM (stream));
|
||
g_return_if_fail (vectors != NULL || n_vectors == 0);
|
||
g_return_if_fail (cancellable == NULL || G_IS_CANCELLABLE (cancellable));
|
||
|
||
class = G_OUTPUT_STREAM_GET_CLASS (stream);
|
||
g_return_if_fail (class->writev_async != NULL);
|
||
|
||
class->writev_async (stream, vectors, n_vectors, io_priority, cancellable,
|
||
callback, user_data);
|
||
}
|
||
|
||
/**
|
||
* g_output_stream_writev_finish:
|
||
* @stream: a #GOutputStream.
|
||
* @result: a #GAsyncResult.
|
||
* @bytes_written: (out) (optional): location to store the number of bytes that were written to the stream
|
||
* @error: a #GError location to store the error occurring, or %NULL to
|
||
* ignore.
|
||
*
|
||
* Finishes a stream writev operation.
|
||
*
|
||
* Returns: %TRUE on success, %FALSE if there was an error
|
||
*
|
||
* Since: 2.60
|
||
*/
|
||
gboolean
|
||
g_output_stream_writev_finish (GOutputStream *stream,
|
||
GAsyncResult *result,
|
||
gsize *bytes_written,
|
||
GError **error)
|
||
{
|
||
GOutputStreamClass *class;
|
||
gboolean res;
|
||
gsize _bytes_written = 0;
|
||
|
||
g_return_val_if_fail (G_IS_OUTPUT_STREAM (stream), FALSE);
|
||
g_return_val_if_fail (G_IS_ASYNC_RESULT (result), FALSE);
|
||
g_return_val_if_fail (error == NULL || *error == NULL, FALSE);
|
||
|
||
class = G_OUTPUT_STREAM_GET_CLASS (stream);
|
||
g_return_val_if_fail (class->writev_finish != NULL, FALSE);
|
||
|
||
res = class->writev_finish (stream, result, &_bytes_written, error);
|
||
|
||
g_warn_if_fail (res || _bytes_written == 0);
|
||
g_warn_if_fail (res || (error == NULL || *error != NULL));
|
||
|
||
if (bytes_written)
|
||
*bytes_written = _bytes_written;
|
||
|
||
return res;
|
||
}
|
||
|
||
typedef struct
|
||
{
|
||
GOutputVector *vectors;
|
||
gsize n_vectors; /* (unowned) */
|
||
gsize bytes_written;
|
||
} AsyncWritevAll;
|
||
|
||
static void
|
||
free_async_writev_all (gpointer data)
|
||
{
|
||
g_slice_free (AsyncWritevAll, data);
|
||
}
|
||
|
||
static void
|
||
writev_all_callback (GObject *stream,
|
||
GAsyncResult *result,
|
||
gpointer user_data)
|
||
{
|
||
GTask *task = user_data;
|
||
AsyncWritevAll *data = g_task_get_task_data (task);
|
||
gint priority = g_task_get_priority (task);
|
||
GCancellable *cancellable = g_task_get_cancellable (task);
|
||
|
||
if (result)
|
||
{
|
||
GError *error = NULL;
|
||
gboolean res;
|
||
gsize n_written = 0;
|
||
|
||
res = g_output_stream_writev_finish (G_OUTPUT_STREAM (stream), result, &n_written, &error);
|
||
|
||
if (!res)
|
||
{
|
||
g_task_return_error (task, g_steal_pointer (&error));
|
||
g_object_unref (task);
|
||
return;
|
||
}
|
||
|
||
g_warn_if_fail (n_written > 0);
|
||
data->bytes_written += n_written;
|
||
|
||
/* skip vectors that have been written in full */
|
||
while (data->n_vectors > 0 && n_written >= data->vectors[0].size)
|
||
{
|
||
n_written -= data->vectors[0].size;
|
||
++data->vectors;
|
||
--data->n_vectors;
|
||
}
|
||
/* skip partially written vector data */
|
||
if (n_written > 0 && data->n_vectors > 0)
|
||
{
|
||
data->vectors[0].size -= n_written;
|
||
data->vectors[0].buffer = ((guint8 *) data->vectors[0].buffer) + n_written;
|
||
}
|
||
}
|
||
|
||
if (data->n_vectors == 0)
|
||
{
|
||
g_task_return_boolean (task, TRUE);
|
||
g_object_unref (task);
|
||
}
|
||
else
|
||
g_output_stream_writev_async (G_OUTPUT_STREAM (stream),
|
||
data->vectors,
|
||
data->n_vectors,
|
||
priority,
|
||
cancellable,
|
||
writev_all_callback, g_steal_pointer (&task));
|
||
}
|
||
|
||
static void
|
||
writev_all_async_thread (GTask *task,
|
||
gpointer source_object,
|
||
gpointer task_data,
|
||
GCancellable *cancellable)
|
||
{
|
||
GOutputStream *stream = G_OUTPUT_STREAM (source_object);
|
||
AsyncWritevAll *data = task_data;
|
||
GError *error = NULL;
|
||
|
||
if (g_output_stream_writev_all (stream, data->vectors, data->n_vectors, &data->bytes_written,
|
||
g_task_get_cancellable (task), &error))
|
||
g_task_return_boolean (task, TRUE);
|
||
else
|
||
g_task_return_error (task, g_steal_pointer (&error));
|
||
}
|
||
|
||
/**
|
||
* g_output_stream_writev_all_async:
|
||
* @stream: A #GOutputStream
|
||
* @vectors: (array length=n_vectors): the buffer containing the #GOutputVectors to write.
|
||
* @n_vectors: the number of vectors to write
|
||
* @io_priority: the I/O priority of the request
|
||
* @cancellable: (nullable): optional #GCancellable object, %NULL to ignore
|
||
* @callback: (scope async): callback to call when the request is satisfied
|
||
* @user_data: (closure): the data to pass to callback function
|
||
*
|
||
* Request an asynchronous write of the bytes contained in the @n_vectors @vectors into
|
||
* the stream. When the operation is finished @callback will be called.
|
||
* You can then call g_output_stream_writev_all_finish() to get the result of the
|
||
* operation.
|
||
*
|
||
* This is the asynchronous version of g_output_stream_writev_all().
|
||
*
|
||
* Call g_output_stream_writev_all_finish() to collect the result.
|
||
*
|
||
* Any outstanding I/O request with higher priority (lower numerical
|
||
* value) will be executed before an outstanding request with lower
|
||
* priority. Default priority is %G_PRIORITY_DEFAULT.
|
||
*
|
||
* Note that no copy of @vectors will be made, so it must stay valid
|
||
* until @callback is called. The content of the individual elements
|
||
* of @vectors might be changed by this function.
|
||
*
|
||
* Since: 2.60
|
||
*/
|
||
void
|
||
g_output_stream_writev_all_async (GOutputStream *stream,
|
||
GOutputVector *vectors,
|
||
gsize n_vectors,
|
||
int io_priority,
|
||
GCancellable *cancellable,
|
||
GAsyncReadyCallback callback,
|
||
gpointer user_data)
|
||
{
|
||
AsyncWritevAll *data;
|
||
GTask *task;
|
||
gsize i, to_be_written = 0;
|
||
|
||
g_return_if_fail (G_IS_OUTPUT_STREAM (stream));
|
||
g_return_if_fail (vectors != NULL || n_vectors == 0);
|
||
g_return_if_fail (cancellable == NULL || G_IS_CANCELLABLE (cancellable));
|
||
|
||
task = g_task_new (stream, cancellable, callback, user_data);
|
||
data = g_slice_new0 (AsyncWritevAll);
|
||
data->vectors = vectors;
|
||
data->n_vectors = n_vectors;
|
||
|
||
g_task_set_source_tag (task, g_output_stream_writev_all_async);
|
||
g_task_set_task_data (task, data, free_async_writev_all);
|
||
g_task_set_priority (task, io_priority);
|
||
|
||
/* We can't write more than G_MAXSIZE bytes overall, otherwise we
|
||
* would overflow the bytes_written counter */
|
||
for (i = 0; i < n_vectors; i++)
|
||
{
|
||
if (to_be_written > G_MAXSIZE - vectors[i].size)
|
||
{
|
||
g_task_return_new_error (task, G_IO_ERROR, G_IO_ERROR_INVALID_ARGUMENT,
|
||
_("Sum of vectors passed to %s too large"),
|
||
G_STRFUNC);
|
||
g_object_unref (task);
|
||
return;
|
||
}
|
||
to_be_written += vectors[i].size;
|
||
}
|
||
|
||
/* If async writes are going to be handled via the threadpool anyway
|
||
* then we may as well do it with a single dispatch instead of
|
||
* bouncing in and out.
|
||
*/
|
||
if (g_output_stream_async_writev_is_via_threads (stream))
|
||
{
|
||
g_task_run_in_thread (task, writev_all_async_thread);
|
||
g_object_unref (task);
|
||
}
|
||
else
|
||
writev_all_callback (G_OBJECT (stream), NULL, g_steal_pointer (&task));
|
||
}
|
||
|
||
/**
|
||
* g_output_stream_writev_all_finish:
|
||
* @stream: a #GOutputStream
|
||
* @result: a #GAsyncResult
|
||
* @bytes_written: (out) (optional): location to store the number of bytes that were written to the stream
|
||
* @error: a #GError location to store the error occurring, or %NULL to ignore.
|
||
*
|
||
* Finishes an asynchronous stream write operation started with
|
||
* g_output_stream_writev_all_async().
|
||
*
|
||
* As a special exception to the normal conventions for functions that
|
||
* use #GError, if this function returns %FALSE (and sets @error) then
|
||
* @bytes_written will be set to the number of bytes that were
|
||
* successfully written before the error was encountered. This
|
||
* functionality is only available from C. If you need it from another
|
||
* language then you must write your own loop around
|
||
* g_output_stream_writev_async().
|
||
*
|
||
* Returns: %TRUE on success, %FALSE if there was an error
|
||
*
|
||
* Since: 2.60
|
||
*/
|
||
gboolean
|
||
g_output_stream_writev_all_finish (GOutputStream *stream,
|
||
GAsyncResult *result,
|
||
gsize *bytes_written,
|
||
GError **error)
|
||
{
|
||
GTask *task;
|
||
|
||
g_return_val_if_fail (G_IS_OUTPUT_STREAM (stream), FALSE);
|
||
g_return_val_if_fail (g_task_is_valid (result, stream), FALSE);
|
||
g_return_val_if_fail (error == NULL || *error == NULL, FALSE);
|
||
|
||
task = G_TASK (result);
|
||
|
||
if (bytes_written)
|
||
{
|
||
AsyncWritevAll *data = (AsyncWritevAll *)g_task_get_task_data (task);
|
||
|
||
*bytes_written = data->bytes_written;
|
||
}
|
||
|
||
return g_task_propagate_boolean (task, error);
|
||
}
|
||
|
||
static void
|
||
write_bytes_callback (GObject *stream,
|
||
GAsyncResult *result,
|
||
gpointer user_data)
|
||
{
|
||
GTask *task = user_data;
|
||
GError *error = NULL;
|
||
gssize nwrote;
|
||
|
||
nwrote = g_output_stream_write_finish (G_OUTPUT_STREAM (stream),
|
||
result, &error);
|
||
if (nwrote == -1)
|
||
g_task_return_error (task, error);
|
||
else
|
||
g_task_return_int (task, nwrote);
|
||
g_object_unref (task);
|
||
}
|
||
|
||
/**
|
||
* g_output_stream_write_bytes_async:
|
||
* @stream: A #GOutputStream.
|
||
* @bytes: The bytes to write
|
||
* @io_priority: the io priority of the request.
|
||
* @cancellable: (nullable): optional #GCancellable object, %NULL to ignore.
|
||
* @callback: (scope async): callback to call when the request is satisfied
|
||
* @user_data: (closure): the data to pass to callback function
|
||
*
|
||
* This function is similar to g_output_stream_write_async(), but
|
||
* takes a #GBytes as input. Due to the refcounted nature of #GBytes,
|
||
* this allows the stream to avoid taking a copy of the data.
|
||
*
|
||
* However, note that this function may still perform partial writes,
|
||
* just like g_output_stream_write_async(). If that occurs, to continue
|
||
* writing, you will need to create a new #GBytes containing just the
|
||
* remaining bytes, using g_bytes_new_from_bytes(). Passing the same
|
||
* #GBytes instance multiple times potentially can result in duplicated
|
||
* data in the output stream.
|
||
*
|
||
* For the synchronous, blocking version of this function, see
|
||
* g_output_stream_write_bytes().
|
||
**/
|
||
void
|
||
g_output_stream_write_bytes_async (GOutputStream *stream,
|
||
GBytes *bytes,
|
||
int io_priority,
|
||
GCancellable *cancellable,
|
||
GAsyncReadyCallback callback,
|
||
gpointer user_data)
|
||
{
|
||
GTask *task;
|
||
gsize size;
|
||
gconstpointer data;
|
||
|
||
data = g_bytes_get_data (bytes, &size);
|
||
|
||
task = g_task_new (stream, cancellable, callback, user_data);
|
||
g_task_set_source_tag (task, g_output_stream_write_bytes_async);
|
||
g_task_set_task_data (task, g_bytes_ref (bytes),
|
||
(GDestroyNotify) g_bytes_unref);
|
||
|
||
g_output_stream_write_async (stream,
|
||
data, size,
|
||
io_priority,
|
||
cancellable,
|
||
write_bytes_callback,
|
||
task);
|
||
}
|
||
|
||
/**
|
||
* g_output_stream_write_bytes_finish:
|
||
* @stream: a #GOutputStream.
|
||
* @result: a #GAsyncResult.
|
||
* @error: a #GError location to store the error occurring, or %NULL to
|
||
* ignore.
|
||
*
|
||
* Finishes a stream write-from-#GBytes operation.
|
||
*
|
||
* Returns: a #gssize containing the number of bytes written to the stream.
|
||
**/
|
||
gssize
|
||
g_output_stream_write_bytes_finish (GOutputStream *stream,
|
||
GAsyncResult *result,
|
||
GError **error)
|
||
{
|
||
g_return_val_if_fail (G_IS_OUTPUT_STREAM (stream), -1);
|
||
g_return_val_if_fail (g_task_is_valid (result, stream), -1);
|
||
|
||
return g_task_propagate_int (G_TASK (result), error);
|
||
}
|
||
|
||
static void
|
||
async_ready_splice_callback_wrapper (GObject *source_object,
|
||
GAsyncResult *res,
|
||
gpointer _data)
|
||
{
|
||
GOutputStream *stream = G_OUTPUT_STREAM (source_object);
|
||
GOutputStreamClass *class;
|
||
GTask *task = _data;
|
||
gssize nspliced;
|
||
GError *error = NULL;
|
||
|
||
g_output_stream_clear_pending (stream);
|
||
|
||
if (g_async_result_legacy_propagate_error (res, &error))
|
||
nspliced = -1;
|
||
else
|
||
{
|
||
class = G_OUTPUT_STREAM_GET_CLASS (stream);
|
||
nspliced = class->splice_finish (stream, res, &error);
|
||
}
|
||
|
||
if (nspliced >= 0)
|
||
g_task_return_int (task, nspliced);
|
||
else
|
||
g_task_return_error (task, error);
|
||
g_object_unref (task);
|
||
}
|
||
|
||
/**
|
||
* g_output_stream_splice_async:
|
||
* @stream: a #GOutputStream.
|
||
* @source: a #GInputStream.
|
||
* @flags: a set of #GOutputStreamSpliceFlags.
|
||
* @io_priority: the io priority of the request.
|
||
* @cancellable: (nullable): optional #GCancellable object, %NULL to ignore.
|
||
* @callback: (scope async): a #GAsyncReadyCallback.
|
||
* @user_data: (closure): user data passed to @callback.
|
||
*
|
||
* Splices a stream asynchronously.
|
||
* When the operation is finished @callback will be called.
|
||
* You can then call g_output_stream_splice_finish() to get the
|
||
* result of the operation.
|
||
*
|
||
* For the synchronous, blocking version of this function, see
|
||
* g_output_stream_splice().
|
||
**/
|
||
void
|
||
g_output_stream_splice_async (GOutputStream *stream,
|
||
GInputStream *source,
|
||
GOutputStreamSpliceFlags flags,
|
||
int io_priority,
|
||
GCancellable *cancellable,
|
||
GAsyncReadyCallback callback,
|
||
gpointer user_data)
|
||
{
|
||
GOutputStreamClass *class;
|
||
GTask *task;
|
||
GError *error = NULL;
|
||
|
||
g_return_if_fail (G_IS_OUTPUT_STREAM (stream));
|
||
g_return_if_fail (G_IS_INPUT_STREAM (source));
|
||
|
||
task = g_task_new (stream, cancellable, callback, user_data);
|
||
g_task_set_source_tag (task, g_output_stream_splice_async);
|
||
g_task_set_priority (task, io_priority);
|
||
g_task_set_task_data (task, g_object_ref (source), g_object_unref);
|
||
|
||
if (g_input_stream_is_closed (source))
|
||
{
|
||
g_task_return_new_error (task,
|
||
G_IO_ERROR, G_IO_ERROR_CLOSED,
|
||
_("Source stream is already closed"));
|
||
g_object_unref (task);
|
||
return;
|
||
}
|
||
|
||
if (!g_output_stream_set_pending (stream, &error))
|
||
{
|
||
g_task_return_error (task, error);
|
||
g_object_unref (task);
|
||
return;
|
||
}
|
||
|
||
class = G_OUTPUT_STREAM_GET_CLASS (stream);
|
||
|
||
class->splice_async (stream, source, flags, io_priority, cancellable,
|
||
async_ready_splice_callback_wrapper, task);
|
||
}
|
||
|
||
/**
|
||
* g_output_stream_splice_finish:
|
||
* @stream: a #GOutputStream.
|
||
* @result: a #GAsyncResult.
|
||
* @error: a #GError location to store the error occurring, or %NULL to
|
||
* ignore.
|
||
*
|
||
* Finishes an asynchronous stream splice operation.
|
||
*
|
||
* Returns: a #gssize of the number of bytes spliced. Note that if the
|
||
* number of bytes spliced is greater than %G_MAXSSIZE, then that
|
||
* will be returned, and there is no way to determine the actual
|
||
* number of bytes spliced.
|
||
**/
|
||
gssize
|
||
g_output_stream_splice_finish (GOutputStream *stream,
|
||
GAsyncResult *result,
|
||
GError **error)
|
||
{
|
||
g_return_val_if_fail (G_IS_OUTPUT_STREAM (stream), FALSE);
|
||
g_return_val_if_fail (g_task_is_valid (result, stream), FALSE);
|
||
g_return_val_if_fail (g_async_result_is_tagged (result, g_output_stream_splice_async), FALSE);
|
||
|
||
/* @result is always the GTask created by g_output_stream_splice_async();
|
||
* we called class->splice_finish() from async_ready_splice_callback_wrapper.
|
||
*/
|
||
return g_task_propagate_int (G_TASK (result), error);
|
||
}
|
||
|
||
static void
|
||
async_ready_flush_callback_wrapper (GObject *source_object,
|
||
GAsyncResult *res,
|
||
gpointer user_data)
|
||
{
|
||
GOutputStream *stream = G_OUTPUT_STREAM (source_object);
|
||
GOutputStreamClass *class;
|
||
GTask *task = user_data;
|
||
gboolean flushed;
|
||
GError *error = NULL;
|
||
|
||
g_output_stream_clear_pending (stream);
|
||
|
||
if (g_async_result_legacy_propagate_error (res, &error))
|
||
flushed = FALSE;
|
||
else
|
||
{
|
||
class = G_OUTPUT_STREAM_GET_CLASS (stream);
|
||
flushed = class->flush_finish (stream, res, &error);
|
||
}
|
||
|
||
if (flushed)
|
||
g_task_return_boolean (task, TRUE);
|
||
else
|
||
g_task_return_error (task, error);
|
||
g_object_unref (task);
|
||
}
|
||
|
||
/**
|
||
* g_output_stream_flush_async:
|
||
* @stream: a #GOutputStream.
|
||
* @io_priority: the io priority of the request.
|
||
* @cancellable: (nullable): optional #GCancellable object, %NULL to ignore.
|
||
* @callback: (scope async): a #GAsyncReadyCallback to call when the request is satisfied
|
||
* @user_data: (closure): the data to pass to callback function
|
||
*
|
||
* Forces an asynchronous write of all user-space buffered data for
|
||
* the given @stream.
|
||
* For behaviour details see g_output_stream_flush().
|
||
*
|
||
* When the operation is finished @callback will be
|
||
* called. You can then call g_output_stream_flush_finish() to get the
|
||
* result of the operation.
|
||
**/
|
||
void
|
||
g_output_stream_flush_async (GOutputStream *stream,
|
||
int io_priority,
|
||
GCancellable *cancellable,
|
||
GAsyncReadyCallback callback,
|
||
gpointer user_data)
|
||
{
|
||
GOutputStreamClass *class;
|
||
GTask *task;
|
||
GError *error = NULL;
|
||
|
||
g_return_if_fail (G_IS_OUTPUT_STREAM (stream));
|
||
|
||
task = g_task_new (stream, cancellable, callback, user_data);
|
||
g_task_set_source_tag (task, g_output_stream_flush_async);
|
||
g_task_set_priority (task, io_priority);
|
||
|
||
if (!g_output_stream_set_pending (stream, &error))
|
||
{
|
||
g_task_return_error (task, error);
|
||
g_object_unref (task);
|
||
return;
|
||
}
|
||
|
||
class = G_OUTPUT_STREAM_GET_CLASS (stream);
|
||
|
||
if (class->flush_async == NULL)
|
||
{
|
||
g_output_stream_clear_pending (stream);
|
||
g_task_return_boolean (task, TRUE);
|
||
g_object_unref (task);
|
||
return;
|
||
}
|
||
|
||
class->flush_async (stream, io_priority, cancellable,
|
||
async_ready_flush_callback_wrapper, task);
|
||
}
|
||
|
||
/**
|
||
* g_output_stream_flush_finish:
|
||
* @stream: a #GOutputStream.
|
||
* @result: a GAsyncResult.
|
||
* @error: a #GError location to store the error occurring, or %NULL to
|
||
* ignore.
|
||
*
|
||
* Finishes flushing an output stream.
|
||
*
|
||
* Returns: %TRUE if flush operation succeeded, %FALSE otherwise.
|
||
**/
|
||
gboolean
|
||
g_output_stream_flush_finish (GOutputStream *stream,
|
||
GAsyncResult *result,
|
||
GError **error)
|
||
{
|
||
g_return_val_if_fail (G_IS_OUTPUT_STREAM (stream), FALSE);
|
||
g_return_val_if_fail (g_task_is_valid (result, stream), FALSE);
|
||
g_return_val_if_fail (g_async_result_is_tagged (result, g_output_stream_flush_async), FALSE);
|
||
|
||
/* @result is always the GTask created by g_output_stream_flush_async();
|
||
* we called class->flush_finish() from async_ready_flush_callback_wrapper.
|
||
*/
|
||
return g_task_propagate_boolean (G_TASK (result), error);
|
||
}
|
||
|
||
|
||
static void
|
||
async_ready_close_callback_wrapper (GObject *source_object,
|
||
GAsyncResult *res,
|
||
gpointer user_data)
|
||
{
|
||
GOutputStream *stream = G_OUTPUT_STREAM (source_object);
|
||
GOutputStreamClass *class;
|
||
GTask *task = user_data;
|
||
GError *error = g_task_get_task_data (task);
|
||
|
||
stream->priv->closing = FALSE;
|
||
stream->priv->closed = TRUE;
|
||
|
||
if (!error && !g_async_result_legacy_propagate_error (res, &error))
|
||
{
|
||
class = G_OUTPUT_STREAM_GET_CLASS (stream);
|
||
|
||
class->close_finish (stream, res,
|
||
error ? NULL : &error);
|
||
}
|
||
|
||
if (error != NULL)
|
||
g_task_return_error (task, error);
|
||
else
|
||
g_task_return_boolean (task, TRUE);
|
||
g_object_unref (task);
|
||
}
|
||
|
||
static void
|
||
async_ready_close_flushed_callback_wrapper (GObject *source_object,
|
||
GAsyncResult *res,
|
||
gpointer user_data)
|
||
{
|
||
GOutputStream *stream = G_OUTPUT_STREAM (source_object);
|
||
GOutputStreamClass *class;
|
||
GTask *task = user_data;
|
||
GError *error = NULL;
|
||
|
||
class = G_OUTPUT_STREAM_GET_CLASS (stream);
|
||
|
||
if (!g_async_result_legacy_propagate_error (res, &error))
|
||
{
|
||
class->flush_finish (stream, res, &error);
|
||
}
|
||
|
||
/* propagate the possible error */
|
||
if (error)
|
||
g_task_set_task_data (task, error, NULL);
|
||
|
||
/* we still close, even if there was a flush error */
|
||
class->close_async (stream,
|
||
g_task_get_priority (task),
|
||
g_task_get_cancellable (task),
|
||
async_ready_close_callback_wrapper, task);
|
||
}
|
||
|
||
static void
|
||
real_close_async_cb (GObject *source_object,
|
||
GAsyncResult *res,
|
||
gpointer user_data)
|
||
{
|
||
GOutputStream *stream = G_OUTPUT_STREAM (source_object);
|
||
GTask *task = user_data;
|
||
GError *error = NULL;
|
||
gboolean ret;
|
||
|
||
g_output_stream_clear_pending (stream);
|
||
|
||
ret = g_output_stream_internal_close_finish (stream, res, &error);
|
||
|
||
if (error != NULL)
|
||
g_task_return_error (task, error);
|
||
else
|
||
g_task_return_boolean (task, ret);
|
||
|
||
g_object_unref (task);
|
||
}
|
||
|
||
/**
|
||
* g_output_stream_close_async:
|
||
* @stream: A #GOutputStream.
|
||
* @io_priority: the io priority of the request.
|
||
* @cancellable: (nullable): optional cancellable object
|
||
* @callback: (scope async): callback to call when the request is satisfied
|
||
* @user_data: (closure): the data to pass to callback function
|
||
*
|
||
* Requests an asynchronous close of the stream, releasing resources
|
||
* related to it. When the operation is finished @callback will be
|
||
* called. You can then call g_output_stream_close_finish() to get
|
||
* the result of the operation.
|
||
*
|
||
* For behaviour details see g_output_stream_close().
|
||
*
|
||
* The asynchronous methods have a default fallback that uses threads
|
||
* to implement asynchronicity, so they are optional for inheriting
|
||
* classes. However, if you override one you must override all.
|
||
**/
|
||
void
|
||
g_output_stream_close_async (GOutputStream *stream,
|
||
int io_priority,
|
||
GCancellable *cancellable,
|
||
GAsyncReadyCallback callback,
|
||
gpointer user_data)
|
||
{
|
||
GTask *task;
|
||
GError *error = NULL;
|
||
|
||
g_return_if_fail (G_IS_OUTPUT_STREAM (stream));
|
||
|
||
task = g_task_new (stream, cancellable, callback, user_data);
|
||
g_task_set_source_tag (task, g_output_stream_close_async);
|
||
g_task_set_priority (task, io_priority);
|
||
|
||
if (!g_output_stream_set_pending (stream, &error))
|
||
{
|
||
g_task_return_error (task, error);
|
||
g_object_unref (task);
|
||
return;
|
||
}
|
||
|
||
g_output_stream_internal_close_async (stream, io_priority, cancellable,
|
||
real_close_async_cb, task);
|
||
}
|
||
|
||
/* Must always be called inside
|
||
* g_output_stream_set_pending()/g_output_stream_clear_pending().
|
||
*/
|
||
void
|
||
g_output_stream_internal_close_async (GOutputStream *stream,
|
||
int io_priority,
|
||
GCancellable *cancellable,
|
||
GAsyncReadyCallback callback,
|
||
gpointer user_data)
|
||
{
|
||
GOutputStreamClass *class;
|
||
GTask *task;
|
||
|
||
task = g_task_new (stream, cancellable, callback, user_data);
|
||
g_task_set_source_tag (task, g_output_stream_internal_close_async);
|
||
g_task_set_priority (task, io_priority);
|
||
|
||
if (stream->priv->closed)
|
||
{
|
||
g_task_return_boolean (task, TRUE);
|
||
g_object_unref (task);
|
||
return;
|
||
}
|
||
|
||
class = G_OUTPUT_STREAM_GET_CLASS (stream);
|
||
stream->priv->closing = TRUE;
|
||
|
||
/* Call close_async directly if there is no need to flush, or if the flush
|
||
can be done sync (in the output stream async close thread) */
|
||
if (class->flush_async == NULL ||
|
||
(class->flush_async == g_output_stream_real_flush_async &&
|
||
(class->flush == NULL || class->close_async == g_output_stream_real_close_async)))
|
||
{
|
||
class->close_async (stream, io_priority, cancellable,
|
||
async_ready_close_callback_wrapper, task);
|
||
}
|
||
else
|
||
{
|
||
/* First do an async flush, then do the async close in the callback
|
||
wrapper (see async_ready_close_flushed_callback_wrapper) */
|
||
class->flush_async (stream, io_priority, cancellable,
|
||
async_ready_close_flushed_callback_wrapper, task);
|
||
}
|
||
}
|
||
|
||
static gboolean
|
||
g_output_stream_internal_close_finish (GOutputStream *stream,
|
||
GAsyncResult *result,
|
||
GError **error)
|
||
{
|
||
g_return_val_if_fail (G_IS_OUTPUT_STREAM (stream), FALSE);
|
||
g_return_val_if_fail (g_task_is_valid (result, stream), FALSE);
|
||
g_return_val_if_fail (g_async_result_is_tagged (result, g_output_stream_internal_close_async), FALSE);
|
||
|
||
return g_task_propagate_boolean (G_TASK (result), error);
|
||
}
|
||
|
||
/**
|
||
* g_output_stream_close_finish:
|
||
* @stream: a #GOutputStream.
|
||
* @result: a #GAsyncResult.
|
||
* @error: a #GError location to store the error occurring, or %NULL to
|
||
* ignore.
|
||
*
|
||
* Closes an output stream.
|
||
*
|
||
* Returns: %TRUE if stream was successfully closed, %FALSE otherwise.
|
||
**/
|
||
gboolean
|
||
g_output_stream_close_finish (GOutputStream *stream,
|
||
GAsyncResult *result,
|
||
GError **error)
|
||
{
|
||
g_return_val_if_fail (G_IS_OUTPUT_STREAM (stream), FALSE);
|
||
g_return_val_if_fail (g_task_is_valid (result, stream), FALSE);
|
||
g_return_val_if_fail (g_async_result_is_tagged (result, g_output_stream_close_async), FALSE);
|
||
|
||
/* @result is always the GTask created by g_output_stream_close_async();
|
||
* we called class->close_finish() from async_ready_close_callback_wrapper.
|
||
*/
|
||
return g_task_propagate_boolean (G_TASK (result), error);
|
||
}
|
||
|
||
/**
|
||
* g_output_stream_is_closed:
|
||
* @stream: a #GOutputStream.
|
||
*
|
||
* Checks if an output stream has already been closed.
|
||
*
|
||
* Returns: %TRUE if @stream is closed. %FALSE otherwise.
|
||
**/
|
||
gboolean
|
||
g_output_stream_is_closed (GOutputStream *stream)
|
||
{
|
||
g_return_val_if_fail (G_IS_OUTPUT_STREAM (stream), TRUE);
|
||
|
||
return stream->priv->closed;
|
||
}
|
||
|
||
/**
|
||
* g_output_stream_is_closing:
|
||
* @stream: a #GOutputStream.
|
||
*
|
||
* Checks if an output stream is being closed. This can be
|
||
* used inside e.g. a flush implementation to see if the
|
||
* flush (or other i/o operation) is called from within
|
||
* the closing operation.
|
||
*
|
||
* Returns: %TRUE if @stream is being closed. %FALSE otherwise.
|
||
*
|
||
* Since: 2.24
|
||
**/
|
||
gboolean
|
||
g_output_stream_is_closing (GOutputStream *stream)
|
||
{
|
||
g_return_val_if_fail (G_IS_OUTPUT_STREAM (stream), TRUE);
|
||
|
||
return stream->priv->closing;
|
||
}
|
||
|
||
/**
|
||
* g_output_stream_has_pending:
|
||
* @stream: a #GOutputStream.
|
||
*
|
||
* Checks if an output stream has pending actions.
|
||
*
|
||
* Returns: %TRUE if @stream has pending actions.
|
||
**/
|
||
gboolean
|
||
g_output_stream_has_pending (GOutputStream *stream)
|
||
{
|
||
g_return_val_if_fail (G_IS_OUTPUT_STREAM (stream), FALSE);
|
||
|
||
return stream->priv->pending;
|
||
}
|
||
|
||
/**
|
||
* g_output_stream_set_pending:
|
||
* @stream: a #GOutputStream.
|
||
* @error: a #GError location to store the error occurring, or %NULL to
|
||
* ignore.
|
||
*
|
||
* Sets @stream to have actions pending. If the pending flag is
|
||
* already set or @stream is closed, it will return %FALSE and set
|
||
* @error.
|
||
*
|
||
* Returns: %TRUE if pending was previously unset and is now set.
|
||
**/
|
||
gboolean
|
||
g_output_stream_set_pending (GOutputStream *stream,
|
||
GError **error)
|
||
{
|
||
g_return_val_if_fail (G_IS_OUTPUT_STREAM (stream), FALSE);
|
||
|
||
if (stream->priv->closed)
|
||
{
|
||
g_set_error_literal (error, G_IO_ERROR, G_IO_ERROR_CLOSED,
|
||
_("Stream is already closed"));
|
||
return FALSE;
|
||
}
|
||
|
||
if (stream->priv->pending)
|
||
{
|
||
g_set_error_literal (error, G_IO_ERROR, G_IO_ERROR_PENDING,
|
||
/* Translators: This is an error you get if there is
|
||
* already an operation running against this stream when
|
||
* you try to start one */
|
||
_("Stream has outstanding operation"));
|
||
return FALSE;
|
||
}
|
||
|
||
stream->priv->pending = TRUE;
|
||
return TRUE;
|
||
}
|
||
|
||
/**
|
||
* g_output_stream_clear_pending:
|
||
* @stream: output stream
|
||
*
|
||
* Clears the pending flag on @stream.
|
||
**/
|
||
void
|
||
g_output_stream_clear_pending (GOutputStream *stream)
|
||
{
|
||
g_return_if_fail (G_IS_OUTPUT_STREAM (stream));
|
||
|
||
stream->priv->pending = FALSE;
|
||
}
|
||
|
||
/*< internal >
|
||
* g_output_stream_async_write_is_via_threads:
|
||
* @stream: a #GOutputStream.
|
||
*
|
||
* Checks if an output stream's write_async function uses threads.
|
||
*
|
||
* Returns: %TRUE if @stream's write_async function uses threads.
|
||
**/
|
||
gboolean
|
||
g_output_stream_async_write_is_via_threads (GOutputStream *stream)
|
||
{
|
||
GOutputStreamClass *class;
|
||
|
||
g_return_val_if_fail (G_IS_OUTPUT_STREAM (stream), FALSE);
|
||
|
||
class = G_OUTPUT_STREAM_GET_CLASS (stream);
|
||
|
||
return (class->write_async == g_output_stream_real_write_async &&
|
||
!(G_IS_POLLABLE_OUTPUT_STREAM (stream) &&
|
||
g_pollable_output_stream_can_poll (G_POLLABLE_OUTPUT_STREAM (stream))));
|
||
}
|
||
|
||
/*< internal >
|
||
* g_output_stream_async_writev_is_via_threads:
|
||
* @stream: a #GOutputStream.
|
||
*
|
||
* Checks if an output stream's writev_async function uses threads.
|
||
*
|
||
* Returns: %TRUE if @stream's writev_async function uses threads.
|
||
**/
|
||
gboolean
|
||
g_output_stream_async_writev_is_via_threads (GOutputStream *stream)
|
||
{
|
||
GOutputStreamClass *class;
|
||
|
||
g_return_val_if_fail (G_IS_OUTPUT_STREAM (stream), FALSE);
|
||
|
||
class = G_OUTPUT_STREAM_GET_CLASS (stream);
|
||
|
||
return (class->writev_async == g_output_stream_real_writev_async &&
|
||
!(G_IS_POLLABLE_OUTPUT_STREAM (stream) &&
|
||
g_pollable_output_stream_can_poll (G_POLLABLE_OUTPUT_STREAM (stream))));
|
||
}
|
||
|
||
/*< internal >
|
||
* g_output_stream_async_close_is_via_threads:
|
||
* @stream: output stream
|
||
*
|
||
* Checks if an output stream's close_async function uses threads.
|
||
*
|
||
* Returns: %TRUE if @stream's close_async function uses threads.
|
||
**/
|
||
gboolean
|
||
g_output_stream_async_close_is_via_threads (GOutputStream *stream)
|
||
{
|
||
GOutputStreamClass *class;
|
||
|
||
g_return_val_if_fail (G_IS_OUTPUT_STREAM (stream), FALSE);
|
||
|
||
class = G_OUTPUT_STREAM_GET_CLASS (stream);
|
||
|
||
return class->close_async == g_output_stream_real_close_async;
|
||
}
|
||
|
||
/********************************************
|
||
* Default implementation of sync ops *
|
||
********************************************/
|
||
static gboolean
|
||
g_output_stream_real_writev (GOutputStream *stream,
|
||
const GOutputVector *vectors,
|
||
gsize n_vectors,
|
||
gsize *bytes_written,
|
||
GCancellable *cancellable,
|
||
GError **error)
|
||
{
|
||
GOutputStreamClass *class;
|
||
gsize _bytes_written = 0;
|
||
gsize i;
|
||
GError *err = NULL;
|
||
|
||
class = G_OUTPUT_STREAM_GET_CLASS (stream);
|
||
|
||
if (bytes_written)
|
||
*bytes_written = 0;
|
||
|
||
for (i = 0; i < n_vectors; i++)
|
||
{
|
||
gssize res = 0;
|
||
|
||
/* Would we overflow here? In that case simply return and let the caller
|
||
* handle this like a short write */
|
||
if (_bytes_written > G_MAXSIZE - vectors[i].size)
|
||
break;
|
||
|
||
res = class->write_fn (stream, vectors[i].buffer, vectors[i].size, cancellable, &err);
|
||
|
||
if (res == -1)
|
||
{
|
||
/* If we already wrote something we handle this like a short write
|
||
* and assume that on the next call the same error happens again, or
|
||
* everything finishes successfully without data loss then
|
||
*/
|
||
if (_bytes_written > 0)
|
||
{
|
||
if (bytes_written)
|
||
*bytes_written = _bytes_written;
|
||
|
||
g_clear_error (&err);
|
||
return TRUE;
|
||
}
|
||
|
||
g_propagate_error (error, err);
|
||
return FALSE;
|
||
}
|
||
|
||
_bytes_written += res;
|
||
/* if we had a short write break the loop here */
|
||
if ((gsize) res < vectors[i].size)
|
||
break;
|
||
}
|
||
|
||
if (bytes_written)
|
||
*bytes_written = _bytes_written;
|
||
|
||
return TRUE;
|
||
}
|
||
|
||
/********************************************
|
||
* Default implementation of async ops *
|
||
********************************************/
|
||
|
||
typedef struct {
|
||
const void *buffer;
|
||
gsize count_requested;
|
||
gssize count_written;
|
||
} WriteData;
|
||
|
||
static void
|
||
free_write_data (WriteData *op)
|
||
{
|
||
g_slice_free (WriteData, op);
|
||
}
|
||
|
||
static void
|
||
write_async_thread (GTask *task,
|
||
gpointer source_object,
|
||
gpointer task_data,
|
||
GCancellable *cancellable)
|
||
{
|
||
GOutputStream *stream = source_object;
|
||
WriteData *op = task_data;
|
||
GOutputStreamClass *class;
|
||
GError *error = NULL;
|
||
gssize count_written;
|
||
|
||
class = G_OUTPUT_STREAM_GET_CLASS (stream);
|
||
count_written = class->write_fn (stream, op->buffer, op->count_requested,
|
||
cancellable, &error);
|
||
if (count_written == -1)
|
||
g_task_return_error (task, error);
|
||
else
|
||
g_task_return_int (task, count_written);
|
||
}
|
||
|
||
static void write_async_pollable (GPollableOutputStream *stream,
|
||
GTask *task);
|
||
|
||
static gboolean
|
||
write_async_pollable_ready (GPollableOutputStream *stream,
|
||
gpointer user_data)
|
||
{
|
||
GTask *task = user_data;
|
||
|
||
write_async_pollable (stream, task);
|
||
return FALSE;
|
||
}
|
||
|
||
static void
|
||
write_async_pollable (GPollableOutputStream *stream,
|
||
GTask *task)
|
||
{
|
||
GError *error = NULL;
|
||
WriteData *op = g_task_get_task_data (task);
|
||
gssize count_written;
|
||
|
||
if (g_task_return_error_if_cancelled (task))
|
||
return;
|
||
|
||
count_written = G_POLLABLE_OUTPUT_STREAM_GET_INTERFACE (stream)->
|
||
write_nonblocking (stream, op->buffer, op->count_requested, &error);
|
||
|
||
if (g_error_matches (error, G_IO_ERROR, G_IO_ERROR_WOULD_BLOCK))
|
||
{
|
||
GSource *source;
|
||
|
||
g_error_free (error);
|
||
|
||
source = g_pollable_output_stream_create_source (stream,
|
||
g_task_get_cancellable (task));
|
||
g_task_attach_source (task, source,
|
||
(GSourceFunc) write_async_pollable_ready);
|
||
g_source_unref (source);
|
||
return;
|
||
}
|
||
|
||
if (count_written == -1)
|
||
g_task_return_error (task, error);
|
||
else
|
||
g_task_return_int (task, count_written);
|
||
}
|
||
|
||
static void
|
||
g_output_stream_real_write_async (GOutputStream *stream,
|
||
const void *buffer,
|
||
gsize count,
|
||
int io_priority,
|
||
GCancellable *cancellable,
|
||
GAsyncReadyCallback callback,
|
||
gpointer user_data)
|
||
{
|
||
GTask *task;
|
||
WriteData *op;
|
||
|
||
op = g_slice_new0 (WriteData);
|
||
task = g_task_new (stream, cancellable, callback, user_data);
|
||
g_task_set_check_cancellable (task, FALSE);
|
||
g_task_set_task_data (task, op, (GDestroyNotify) free_write_data);
|
||
op->buffer = buffer;
|
||
op->count_requested = count;
|
||
|
||
if (!g_output_stream_async_write_is_via_threads (stream))
|
||
write_async_pollable (G_POLLABLE_OUTPUT_STREAM (stream), task);
|
||
else
|
||
g_task_run_in_thread (task, write_async_thread);
|
||
g_object_unref (task);
|
||
}
|
||
|
||
static gssize
|
||
g_output_stream_real_write_finish (GOutputStream *stream,
|
||
GAsyncResult *result,
|
||
GError **error)
|
||
{
|
||
g_return_val_if_fail (g_task_is_valid (result, stream), FALSE);
|
||
|
||
return g_task_propagate_int (G_TASK (result), error);
|
||
}
|
||
|
||
typedef struct {
|
||
const GOutputVector *vectors;
|
||
gsize n_vectors; /* (unowned) */
|
||
gsize bytes_written;
|
||
} WritevData;
|
||
|
||
static void
|
||
free_writev_data (WritevData *op)
|
||
{
|
||
g_slice_free (WritevData, op);
|
||
}
|
||
|
||
static void
|
||
writev_async_thread (GTask *task,
|
||
gpointer source_object,
|
||
gpointer task_data,
|
||
GCancellable *cancellable)
|
||
{
|
||
GOutputStream *stream = source_object;
|
||
WritevData *op = task_data;
|
||
GOutputStreamClass *class;
|
||
GError *error = NULL;
|
||
gboolean res;
|
||
|
||
class = G_OUTPUT_STREAM_GET_CLASS (stream);
|
||
res = class->writev_fn (stream, op->vectors, op->n_vectors,
|
||
&op->bytes_written, cancellable, &error);
|
||
|
||
g_warn_if_fail (res || op->bytes_written == 0);
|
||
g_warn_if_fail (res || error != NULL);
|
||
|
||
if (!res)
|
||
g_task_return_error (task, g_steal_pointer (&error));
|
||
else
|
||
g_task_return_boolean (task, TRUE);
|
||
}
|
||
|
||
static void writev_async_pollable (GPollableOutputStream *stream,
|
||
GTask *task);
|
||
|
||
static gboolean
|
||
writev_async_pollable_ready (GPollableOutputStream *stream,
|
||
gpointer user_data)
|
||
{
|
||
GTask *task = user_data;
|
||
|
||
writev_async_pollable (stream, task);
|
||
return G_SOURCE_REMOVE;
|
||
}
|
||
|
||
static void
|
||
writev_async_pollable (GPollableOutputStream *stream,
|
||
GTask *task)
|
||
{
|
||
GError *error = NULL;
|
||
WritevData *op = g_task_get_task_data (task);
|
||
GPollableReturn res;
|
||
gsize bytes_written = 0;
|
||
|
||
if (g_task_return_error_if_cancelled (task))
|
||
return;
|
||
|
||
res = G_POLLABLE_OUTPUT_STREAM_GET_INTERFACE (stream)->
|
||
writev_nonblocking (stream, op->vectors, op->n_vectors, &bytes_written, &error);
|
||
|
||
switch (res)
|
||
{
|
||
case G_POLLABLE_RETURN_WOULD_BLOCK:
|
||
{
|
||
GSource *source;
|
||
|
||
g_warn_if_fail (error == NULL);
|
||
g_warn_if_fail (bytes_written == 0);
|
||
|
||
source = g_pollable_output_stream_create_source (stream,
|
||
g_task_get_cancellable (task));
|
||
g_task_attach_source (task, source,
|
||
(GSourceFunc) writev_async_pollable_ready);
|
||
g_source_unref (source);
|
||
}
|
||
break;
|
||
case G_POLLABLE_RETURN_OK:
|
||
g_warn_if_fail (error == NULL);
|
||
op->bytes_written = bytes_written;
|
||
g_task_return_boolean (task, TRUE);
|
||
break;
|
||
case G_POLLABLE_RETURN_FAILED:
|
||
g_warn_if_fail (bytes_written == 0);
|
||
g_warn_if_fail (error != NULL);
|
||
g_task_return_error (task, g_steal_pointer (&error));
|
||
break;
|
||
default:
|
||
g_assert_not_reached ();
|
||
}
|
||
}
|
||
|
||
static void
|
||
g_output_stream_real_writev_async (GOutputStream *stream,
|
||
const GOutputVector *vectors,
|
||
gsize n_vectors,
|
||
int io_priority,
|
||
GCancellable *cancellable,
|
||
GAsyncReadyCallback callback,
|
||
gpointer user_data)
|
||
{
|
||
GTask *task;
|
||
WritevData *op;
|
||
GError *error = NULL;
|
||
|
||
op = g_slice_new0 (WritevData);
|
||
task = g_task_new (stream, cancellable, callback, user_data);
|
||
op->vectors = vectors;
|
||
op->n_vectors = n_vectors;
|
||
|
||
g_task_set_check_cancellable (task, FALSE);
|
||
g_task_set_source_tag (task, g_output_stream_writev_async);
|
||
g_task_set_priority (task, io_priority);
|
||
g_task_set_task_data (task, op, (GDestroyNotify) free_writev_data);
|
||
|
||
if (n_vectors == 0)
|
||
{
|
||
g_task_return_boolean (task, TRUE);
|
||
g_object_unref (task);
|
||
return;
|
||
}
|
||
|
||
if (!g_output_stream_set_pending (stream, &error))
|
||
{
|
||
g_task_return_error (task, g_steal_pointer (&error));
|
||
g_object_unref (task);
|
||
return;
|
||
}
|
||
|
||
if (!g_output_stream_async_writev_is_via_threads (stream))
|
||
writev_async_pollable (G_POLLABLE_OUTPUT_STREAM (stream), task);
|
||
else
|
||
g_task_run_in_thread (task, writev_async_thread);
|
||
|
||
g_object_unref (task);
|
||
}
|
||
|
||
static gboolean
|
||
g_output_stream_real_writev_finish (GOutputStream *stream,
|
||
GAsyncResult *result,
|
||
gsize *bytes_written,
|
||
GError **error)
|
||
{
|
||
GTask *task;
|
||
|
||
g_return_val_if_fail (g_task_is_valid (result, stream), FALSE);
|
||
g_return_val_if_fail (g_async_result_is_tagged (result, g_output_stream_writev_async), FALSE);
|
||
|
||
g_output_stream_clear_pending (stream);
|
||
|
||
task = G_TASK (result);
|
||
|
||
if (bytes_written)
|
||
{
|
||
WritevData *op = g_task_get_task_data (task);
|
||
|
||
*bytes_written = op->bytes_written;
|
||
}
|
||
|
||
return g_task_propagate_boolean (task, error);
|
||
}
|
||
|
||
typedef struct {
|
||
GInputStream *source;
|
||
GOutputStreamSpliceFlags flags;
|
||
guint istream_closed : 1;
|
||
guint ostream_closed : 1;
|
||
gssize n_read;
|
||
gssize n_written;
|
||
gsize bytes_copied;
|
||
GError *error;
|
||
guint8 *buffer;
|
||
} SpliceData;
|
||
|
||
static void
|
||
free_splice_data (SpliceData *op)
|
||
{
|
||
g_clear_pointer (&op->buffer, g_free);
|
||
g_object_unref (op->source);
|
||
g_clear_error (&op->error);
|
||
g_free (op);
|
||
}
|
||
|
||
static void
|
||
real_splice_async_complete_cb (GTask *task)
|
||
{
|
||
SpliceData *op = g_task_get_task_data (task);
|
||
|
||
if (op->flags & G_OUTPUT_STREAM_SPLICE_CLOSE_SOURCE &&
|
||
!op->istream_closed)
|
||
return;
|
||
|
||
if (op->flags & G_OUTPUT_STREAM_SPLICE_CLOSE_TARGET &&
|
||
!op->ostream_closed)
|
||
return;
|
||
|
||
if (op->error != NULL)
|
||
{
|
||
g_task_return_error (task, op->error);
|
||
op->error = NULL;
|
||
}
|
||
else
|
||
{
|
||
g_task_return_int (task, op->bytes_copied);
|
||
}
|
||
|
||
g_object_unref (task);
|
||
}
|
||
|
||
static void
|
||
real_splice_async_close_input_cb (GObject *source,
|
||
GAsyncResult *res,
|
||
gpointer user_data)
|
||
{
|
||
GTask *task = user_data;
|
||
SpliceData *op = g_task_get_task_data (task);
|
||
|
||
g_input_stream_close_finish (G_INPUT_STREAM (source), res, NULL);
|
||
op->istream_closed = TRUE;
|
||
|
||
real_splice_async_complete_cb (task);
|
||
}
|
||
|
||
static void
|
||
real_splice_async_close_output_cb (GObject *source,
|
||
GAsyncResult *res,
|
||
gpointer user_data)
|
||
{
|
||
GTask *task = G_TASK (user_data);
|
||
SpliceData *op = g_task_get_task_data (task);
|
||
GError **error = (op->error == NULL) ? &op->error : NULL;
|
||
|
||
g_output_stream_internal_close_finish (G_OUTPUT_STREAM (source), res, error);
|
||
op->ostream_closed = TRUE;
|
||
|
||
real_splice_async_complete_cb (task);
|
||
}
|
||
|
||
static void
|
||
real_splice_async_complete (GTask *task)
|
||
{
|
||
SpliceData *op = g_task_get_task_data (task);
|
||
gboolean done = TRUE;
|
||
|
||
if (op->flags & G_OUTPUT_STREAM_SPLICE_CLOSE_SOURCE)
|
||
{
|
||
done = FALSE;
|
||
g_input_stream_close_async (op->source, g_task_get_priority (task),
|
||
g_task_get_cancellable (task),
|
||
real_splice_async_close_input_cb, task);
|
||
}
|
||
|
||
if (op->flags & G_OUTPUT_STREAM_SPLICE_CLOSE_TARGET)
|
||
{
|
||
done = FALSE;
|
||
g_output_stream_internal_close_async (g_task_get_source_object (task),
|
||
g_task_get_priority (task),
|
||
g_task_get_cancellable (task),
|
||
real_splice_async_close_output_cb,
|
||
task);
|
||
}
|
||
|
||
if (done)
|
||
real_splice_async_complete_cb (task);
|
||
}
|
||
|
||
static void real_splice_async_read_cb (GObject *source,
|
||
GAsyncResult *res,
|
||
gpointer user_data);
|
||
|
||
static void
|
||
real_splice_async_write_cb (GObject *source,
|
||
GAsyncResult *res,
|
||
gpointer user_data)
|
||
{
|
||
GOutputStreamClass *class;
|
||
GTask *task = G_TASK (user_data);
|
||
SpliceData *op = g_task_get_task_data (task);
|
||
gssize ret;
|
||
|
||
class = G_OUTPUT_STREAM_GET_CLASS (g_task_get_source_object (task));
|
||
|
||
ret = class->write_finish (G_OUTPUT_STREAM (source), res, &op->error);
|
||
|
||
if (ret == -1)
|
||
{
|
||
real_splice_async_complete (task);
|
||
return;
|
||
}
|
||
|
||
op->n_written += ret;
|
||
op->bytes_copied += ret;
|
||
if (op->bytes_copied > G_MAXSSIZE)
|
||
op->bytes_copied = G_MAXSSIZE;
|
||
|
||
if (op->n_written < op->n_read)
|
||
{
|
||
class->write_async (g_task_get_source_object (task),
|
||
op->buffer + op->n_written,
|
||
op->n_read - op->n_written,
|
||
g_task_get_priority (task),
|
||
g_task_get_cancellable (task),
|
||
real_splice_async_write_cb, task);
|
||
return;
|
||
}
|
||
|
||
g_input_stream_read_async (op->source, op->buffer, 8192,
|
||
g_task_get_priority (task),
|
||
g_task_get_cancellable (task),
|
||
real_splice_async_read_cb, task);
|
||
}
|
||
|
||
static void
|
||
real_splice_async_read_cb (GObject *source,
|
||
GAsyncResult *res,
|
||
gpointer user_data)
|
||
{
|
||
GOutputStreamClass *class;
|
||
GTask *task = G_TASK (user_data);
|
||
SpliceData *op = g_task_get_task_data (task);
|
||
gssize ret;
|
||
|
||
class = G_OUTPUT_STREAM_GET_CLASS (g_task_get_source_object (task));
|
||
|
||
ret = g_input_stream_read_finish (op->source, res, &op->error);
|
||
if (ret == -1 || ret == 0)
|
||
{
|
||
real_splice_async_complete (task);
|
||
return;
|
||
}
|
||
|
||
op->n_read = ret;
|
||
op->n_written = 0;
|
||
|
||
class->write_async (g_task_get_source_object (task), op->buffer,
|
||
op->n_read, g_task_get_priority (task),
|
||
g_task_get_cancellable (task),
|
||
real_splice_async_write_cb, task);
|
||
}
|
||
|
||
static void
|
||
splice_async_thread (GTask *task,
|
||
gpointer source_object,
|
||
gpointer task_data,
|
||
GCancellable *cancellable)
|
||
{
|
||
GOutputStream *stream = source_object;
|
||
SpliceData *op = task_data;
|
||
GOutputStreamClass *class;
|
||
GError *error = NULL;
|
||
gssize bytes_copied;
|
||
|
||
class = G_OUTPUT_STREAM_GET_CLASS (stream);
|
||
|
||
bytes_copied = class->splice (stream,
|
||
op->source,
|
||
op->flags,
|
||
cancellable,
|
||
&error);
|
||
if (bytes_copied == -1)
|
||
g_task_return_error (task, error);
|
||
else
|
||
g_task_return_int (task, bytes_copied);
|
||
}
|
||
|
||
static void
|
||
g_output_stream_real_splice_async (GOutputStream *stream,
|
||
GInputStream *source,
|
||
GOutputStreamSpliceFlags flags,
|
||
int io_priority,
|
||
GCancellable *cancellable,
|
||
GAsyncReadyCallback callback,
|
||
gpointer user_data)
|
||
{
|
||
GTask *task;
|
||
SpliceData *op;
|
||
|
||
op = g_new0 (SpliceData, 1);
|
||
task = g_task_new (stream, cancellable, callback, user_data);
|
||
g_task_set_task_data (task, op, (GDestroyNotify)free_splice_data);
|
||
op->flags = flags;
|
||
op->source = g_object_ref (source);
|
||
|
||
if (g_input_stream_async_read_is_via_threads (source) &&
|
||
g_output_stream_async_write_is_via_threads (stream))
|
||
{
|
||
g_task_run_in_thread (task, splice_async_thread);
|
||
g_object_unref (task);
|
||
}
|
||
else
|
||
{
|
||
op->buffer = g_malloc (8192);
|
||
g_input_stream_read_async (op->source, op->buffer, 8192,
|
||
g_task_get_priority (task),
|
||
g_task_get_cancellable (task),
|
||
real_splice_async_read_cb, task);
|
||
}
|
||
}
|
||
|
||
static gssize
|
||
g_output_stream_real_splice_finish (GOutputStream *stream,
|
||
GAsyncResult *result,
|
||
GError **error)
|
||
{
|
||
g_return_val_if_fail (g_task_is_valid (result, stream), FALSE);
|
||
|
||
return g_task_propagate_int (G_TASK (result), error);
|
||
}
|
||
|
||
|
||
static void
|
||
flush_async_thread (GTask *task,
|
||
gpointer source_object,
|
||
gpointer task_data,
|
||
GCancellable *cancellable)
|
||
{
|
||
GOutputStream *stream = source_object;
|
||
GOutputStreamClass *class;
|
||
gboolean result;
|
||
GError *error = NULL;
|
||
|
||
class = G_OUTPUT_STREAM_GET_CLASS (stream);
|
||
result = TRUE;
|
||
if (class->flush)
|
||
result = class->flush (stream, cancellable, &error);
|
||
|
||
if (result)
|
||
g_task_return_boolean (task, TRUE);
|
||
else
|
||
g_task_return_error (task, error);
|
||
}
|
||
|
||
static void
|
||
g_output_stream_real_flush_async (GOutputStream *stream,
|
||
int io_priority,
|
||
GCancellable *cancellable,
|
||
GAsyncReadyCallback callback,
|
||
gpointer user_data)
|
||
{
|
||
GTask *task;
|
||
|
||
task = g_task_new (stream, cancellable, callback, user_data);
|
||
g_task_set_priority (task, io_priority);
|
||
g_task_run_in_thread (task, flush_async_thread);
|
||
g_object_unref (task);
|
||
}
|
||
|
||
static gboolean
|
||
g_output_stream_real_flush_finish (GOutputStream *stream,
|
||
GAsyncResult *result,
|
||
GError **error)
|
||
{
|
||
g_return_val_if_fail (g_task_is_valid (result, stream), FALSE);
|
||
|
||
return g_task_propagate_boolean (G_TASK (result), error);
|
||
}
|
||
|
||
static void
|
||
close_async_thread (GTask *task,
|
||
gpointer source_object,
|
||
gpointer task_data,
|
||
GCancellable *cancellable)
|
||
{
|
||
GOutputStream *stream = source_object;
|
||
GOutputStreamClass *class;
|
||
GError *error = NULL;
|
||
gboolean result = TRUE;
|
||
|
||
class = G_OUTPUT_STREAM_GET_CLASS (stream);
|
||
|
||
/* Do a flush here if there is a flush function, and we did not have to do
|
||
* an async flush before (see g_output_stream_close_async)
|
||
*/
|
||
if (class->flush != NULL &&
|
||
(class->flush_async == NULL ||
|
||
class->flush_async == g_output_stream_real_flush_async))
|
||
{
|
||
result = class->flush (stream, cancellable, &error);
|
||
}
|
||
|
||
/* Auto handling of cancellation disabled, and ignore
|
||
cancellation, since we want to close things anyway, although
|
||
possibly in a quick-n-dirty way. At least we never want to leak
|
||
open handles */
|
||
|
||
if (class->close_fn)
|
||
{
|
||
/* Make sure to close, even if the flush failed (see sync close) */
|
||
if (!result)
|
||
class->close_fn (stream, cancellable, NULL);
|
||
else
|
||
result = class->close_fn (stream, cancellable, &error);
|
||
}
|
||
|
||
if (result)
|
||
g_task_return_boolean (task, TRUE);
|
||
else
|
||
g_task_return_error (task, error);
|
||
}
|
||
|
||
static void
|
||
g_output_stream_real_close_async (GOutputStream *stream,
|
||
int io_priority,
|
||
GCancellable *cancellable,
|
||
GAsyncReadyCallback callback,
|
||
gpointer user_data)
|
||
{
|
||
GTask *task;
|
||
|
||
task = g_task_new (stream, cancellable, callback, user_data);
|
||
g_task_set_priority (task, io_priority);
|
||
g_task_run_in_thread (task, close_async_thread);
|
||
g_object_unref (task);
|
||
}
|
||
|
||
static gboolean
|
||
g_output_stream_real_close_finish (GOutputStream *stream,
|
||
GAsyncResult *result,
|
||
GError **error)
|
||
{
|
||
g_return_val_if_fail (g_task_is_valid (result, stream), FALSE);
|
||
|
||
return g_task_propagate_boolean (G_TASK (result), error);
|
||
}
|