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glib/gio/gfilterinputstream.c
Alexander Larsson 4fbbe190b7 Remove default implementation of async filter steam ops 
Not only is the default implementation broken (it causes infinite recursion
as seen in bug #603982), but its also worthless. If we just fall back on the
default stream operations we automatically get async version based on
the sync filter stream operations, which is what we want.
2009-12-07 22:14:10 +01:00

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/* GIO - GLib Input, Output and Streaming Library
*
* Copyright (C) 2006-2007 Red Hat, Inc.
*
* 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 of the License, or (at your option) any later version.
*
* 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
* Public License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place, Suite 330,
* Boston, MA 02111-1307, USA.
*
* Author: Christian Kellner <gicmo@gnome.org>
*/
#include "config.h"
#include "gfilterinputstream.h"
#include "ginputstream.h"
#include "gsimpleasyncresult.h"
#include "glibintl.h"
#include "gioalias.h"
/**
* SECTION:gfilterinputstream
* @short_description: Filter Input Stream
* @include: gio/gio.h
*
**/
enum {
PROP_0,
PROP_BASE_STREAM,
PROP_CLOSE_BASE
};
static void g_filter_input_stream_set_property (GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec);
static void g_filter_input_stream_get_property (GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec);
static void g_filter_input_stream_finalize (GObject *object);
static gssize g_filter_input_stream_read (GInputStream *stream,
void *buffer,
gsize count,
GCancellable *cancellable,
GError **error);
static gssize g_filter_input_stream_skip (GInputStream *stream,
gsize count,
GCancellable *cancellable,
GError **error);
static gboolean g_filter_input_stream_close (GInputStream *stream,
GCancellable *cancellable,
GError **error);
G_DEFINE_TYPE (GFilterInputStream, g_filter_input_stream, G_TYPE_INPUT_STREAM)
#define GET_PRIVATE(inst) G_TYPE_INSTANCE_GET_PRIVATE (inst, \
G_TYPE_FILTER_INPUT_STREAM, GFilterInputStreamPrivate)
typedef struct
{
gboolean close_base;
GAsyncReadyCallback outstanding_callback;
gpointer outstanding_user_data;
} GFilterInputStreamPrivate;
static void
g_filter_input_stream_class_init (GFilterInputStreamClass *klass)
{
GObjectClass *object_class;
GInputStreamClass *istream_class;
object_class = G_OBJECT_CLASS (klass);
object_class->get_property = g_filter_input_stream_get_property;
object_class->set_property = g_filter_input_stream_set_property;
object_class->finalize = g_filter_input_stream_finalize;
istream_class = G_INPUT_STREAM_CLASS (klass);
istream_class->read_fn = g_filter_input_stream_read;
istream_class->skip = g_filter_input_stream_skip;
istream_class->close_fn = g_filter_input_stream_close;
g_type_class_add_private (klass, sizeof (GFilterInputStreamPrivate));
g_object_class_install_property (object_class,
PROP_BASE_STREAM,
g_param_spec_object ("base-stream",
P_("The Filter Base Stream"),
P_("The underlying base stream on which the io ops will be done."),
G_TYPE_INPUT_STREAM,
G_PARAM_READWRITE | G_PARAM_CONSTRUCT_ONLY |
G_PARAM_STATIC_NAME|G_PARAM_STATIC_NICK|G_PARAM_STATIC_BLURB));
g_object_class_install_property (object_class,
PROP_CLOSE_BASE,
g_param_spec_boolean ("close-base-stream",
P_("Close Base Stream"),
P_("If the base stream should be closed when the filter stream is closed."),
TRUE, G_PARAM_READWRITE | G_PARAM_CONSTRUCT_ONLY |
G_PARAM_STATIC_NAME|G_PARAM_STATIC_NICK|G_PARAM_STATIC_BLURB));
}
static void
g_filter_input_stream_set_property (GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec)
{
GFilterInputStream *filter_stream;
GObject *obj;
filter_stream = G_FILTER_INPUT_STREAM (object);
switch (prop_id)
{
case PROP_BASE_STREAM:
obj = g_value_dup_object (value);
filter_stream->base_stream = G_INPUT_STREAM (obj);
break;
case PROP_CLOSE_BASE:
g_filter_input_stream_set_close_base_stream (filter_stream,
g_value_get_boolean (value));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
g_filter_input_stream_get_property (GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec)
{
GFilterInputStream *filter_stream;
filter_stream = G_FILTER_INPUT_STREAM (object);
switch (prop_id)
{
case PROP_BASE_STREAM:
g_value_set_object (value, filter_stream->base_stream);
break;
case PROP_CLOSE_BASE:
g_value_set_boolean (value, GET_PRIVATE (filter_stream)->close_base);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
g_filter_input_stream_finalize (GObject *object)
{
GFilterInputStream *stream;
stream = G_FILTER_INPUT_STREAM (object);
g_object_unref (stream->base_stream);
G_OBJECT_CLASS (g_filter_input_stream_parent_class)->finalize (object);
}
static void
g_filter_input_stream_init (GFilterInputStream *stream)
{
}
/**
* g_filter_input_stream_get_base_stream:
* @stream: a #GFilterInputStream.
*
* Gets the base stream for the filter stream.
*
* Returns: a #GInputStream.
**/
GInputStream *
g_filter_input_stream_get_base_stream (GFilterInputStream *stream)
{
g_return_val_if_fail (G_IS_FILTER_INPUT_STREAM (stream), NULL);
return stream->base_stream;
}
/**
* g_filter_input_stream_get_close_base_stream:
* @stream: a #GFilterInputStream.
*
* Returns whether the base stream will be closed when @stream is
* closed.
*
* Return value: %TRUE if the base stream will be closed.
**/
gboolean
g_filter_input_stream_get_close_base_stream (GFilterInputStream *stream)
{
g_return_val_if_fail (G_IS_FILTER_INPUT_STREAM (stream), FALSE);
return GET_PRIVATE (stream)->close_base;
}
/**
* g_filter_input_stream_set_close_base_stream:
* @stream: a #GFilterInputStream.
* @close_base: %TRUE to close the base stream.
*
* Sets whether the base stream will be closed when @stream is closed.
**/
void
g_filter_input_stream_set_close_base_stream (GFilterInputStream *stream,
gboolean close_base)
{
GFilterInputStreamPrivate *priv;
g_return_if_fail (G_IS_FILTER_INPUT_STREAM (stream));
close_base = !!close_base;
priv = GET_PRIVATE (stream);
if (priv->close_base != close_base)
{
priv->close_base = close_base;
g_object_notify (G_OBJECT (stream), "close-base-stream");
}
}
static gssize
g_filter_input_stream_read (GInputStream *stream,
void *buffer,
gsize count,
GCancellable *cancellable,
GError **error)
{
GFilterInputStream *filter_stream;
GInputStream *base_stream;
gssize nread;
filter_stream = G_FILTER_INPUT_STREAM (stream);
base_stream = filter_stream->base_stream;
nread = g_input_stream_read (base_stream,
buffer,
count,
cancellable,
error);
return nread;
}
static gssize
g_filter_input_stream_skip (GInputStream *stream,
gsize count,
GCancellable *cancellable,
GError **error)
{
GFilterInputStream *filter_stream;
GInputStream *base_stream;
gssize nskipped;
filter_stream = G_FILTER_INPUT_STREAM (stream);
base_stream = filter_stream->base_stream;
nskipped = g_input_stream_skip (base_stream,
count,
cancellable,
error);
return nskipped;
}
static gboolean
g_filter_input_stream_close (GInputStream *stream,
GCancellable *cancellable,
GError **error)
{
gboolean res = TRUE;
if (GET_PRIVATE (stream)->close_base)
{
GFilterInputStream *filter_stream;
GInputStream *base_stream;
filter_stream = G_FILTER_INPUT_STREAM (stream);
base_stream = filter_stream->base_stream;
res = g_input_stream_close (base_stream,
cancellable,
error);
}
return res;
}
#define __G_FILTER_INPUT_STREAM_C__
#include "gioaliasdef.c"
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