glib/gio/gsocketinputstream.c

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/* GIO - GLib Input, Output and Streaming Library
*
* Copyright © 2008 Christian Kellner, Samuel Cormier-Iijima
* © 2009 codethink
*
* 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.
*
* Authors: Christian Kellner <gicmo@gnome.org>
* Samuel Cormier-Iijima <sciyoshi@gmail.com>
* Ryan Lortie <desrt@desrt.ca>
*/
#include "config.h"
#include "gsocketinputstream.h"
#include "glibintl.h"
#include <gio/gsimpleasyncresult.h>
#include <gio/gcancellable.h>
#define g_socket_input_stream_get_type _g_socket_input_stream_get_type
G_DEFINE_TYPE (GSocketInputStream, g_socket_input_stream, G_TYPE_INPUT_STREAM);
enum
{
PROP_0,
PROP_SOCKET
};
struct _GSocketInputStreamPrivate
{
GSocket *socket;
/* pending operation metadata */
GSimpleAsyncResult *result;
GCancellable *cancellable;
gboolean from_mainloop;
gpointer buffer;
gsize count;
};
static void
g_socket_input_stream_get_property (GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec)
{
GSocketInputStream *stream = G_SOCKET_INPUT_STREAM (object);
switch (prop_id)
{
case PROP_SOCKET:
g_value_set_object (value, stream->priv->socket);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
}
}
static void
g_socket_input_stream_set_property (GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec)
{
GSocketInputStream *stream = G_SOCKET_INPUT_STREAM (object);
switch (prop_id)
{
case PROP_SOCKET:
stream->priv->socket = g_value_dup_object (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
}
}
static void
g_socket_input_stream_finalize (GObject *object)
{
GSocketInputStream *stream = G_SOCKET_INPUT_STREAM (object);
if (stream->priv->socket)
g_object_unref (stream->priv->socket);
if (G_OBJECT_CLASS (g_socket_input_stream_parent_class)->finalize)
(*G_OBJECT_CLASS (g_socket_input_stream_parent_class)->finalize) (object);
}
static gssize
g_socket_input_stream_read (GInputStream *stream,
void *buffer,
gsize count,
GCancellable *cancellable,
GError **error)
{
GSocketInputStream *input_stream = G_SOCKET_INPUT_STREAM (stream);
if (!g_socket_condition_wait (input_stream->priv->socket,
G_IO_IN, cancellable, error))
return -1;
return g_socket_receive (input_stream->priv->socket, buffer, count, error);
}
static gboolean
g_socket_input_stream_read_ready (GSocket *socket,
GIOCondition condition,
GSocketInputStream *stream)
{
GSimpleAsyncResult *simple;
GError *error = NULL;
simple = stream->priv->result;
stream->priv->result = NULL;
if (!g_cancellable_set_error_if_cancelled (stream->priv->cancellable,
&error))
{
gssize result;
result = g_socket_receive (stream->priv->socket,
stream->priv->buffer,
stream->priv->count,
&error);
if (result >= 0)
g_simple_async_result_set_op_res_gssize (simple, result);
}
if (error)
{
g_simple_async_result_set_from_error (simple, error);
g_error_free (error);
}
if (stream->priv->cancellable)
g_object_unref (stream->priv->cancellable);
if (stream->priv->from_mainloop)
g_simple_async_result_complete (simple);
else
g_simple_async_result_complete_in_idle (simple);
g_object_unref (simple);
return FALSE;
}
static void
g_socket_input_stream_read_async (GInputStream *stream,
void *buffer,
gsize count,
gint io_priority,
GCancellable *cancellable,
GAsyncReadyCallback callback,
gpointer user_data)
{
GSocketInputStream *input_stream = G_SOCKET_INPUT_STREAM (stream);
g_assert (input_stream->priv->result == NULL);
input_stream->priv->result =
g_simple_async_result_new (G_OBJECT (stream), callback, user_data,
g_socket_input_stream_read_async);
if (cancellable)
g_object_ref (cancellable);
input_stream->priv->cancellable = cancellable;
input_stream->priv->buffer = buffer;
input_stream->priv->count = count;
if (!g_socket_condition_check (input_stream->priv->socket, G_IO_IN))
{
GSource *source;
input_stream->priv->from_mainloop = TRUE;
source = g_socket_create_source (input_stream->priv->socket,
G_IO_IN | G_IO_HUP | G_IO_ERR,
cancellable);
g_source_set_callback (source,
(GSourceFunc) g_socket_input_stream_read_ready,
g_object_ref (input_stream), g_object_unref);
g_source_attach (source, NULL);
g_source_unref (source);
}
else
{
input_stream->priv->from_mainloop = FALSE;
g_socket_input_stream_read_ready (input_stream->priv->socket, G_IO_IN, input_stream);
}
}
static gssize
g_socket_input_stream_read_finish (GInputStream *stream,
GAsyncResult *result,
GError **error)
{
GSimpleAsyncResult *simple;
gssize count;
g_return_val_if_fail (G_IS_SOCKET_INPUT_STREAM (stream), -1);
simple = G_SIMPLE_ASYNC_RESULT (result);
g_warn_if_fail (g_simple_async_result_get_source_tag (simple) == g_socket_input_stream_read_async);
count = g_simple_async_result_get_op_res_gssize (simple);
return count;
}
static void
g_socket_input_stream_class_init (GSocketInputStreamClass *klass)
{
GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
GInputStreamClass *ginputstream_class = G_INPUT_STREAM_CLASS (klass);
g_type_class_add_private (klass, sizeof (GSocketInputStreamPrivate));
gobject_class->finalize = g_socket_input_stream_finalize;
gobject_class->get_property = g_socket_input_stream_get_property;
gobject_class->set_property = g_socket_input_stream_set_property;
ginputstream_class->read_fn = g_socket_input_stream_read;
ginputstream_class->read_async = g_socket_input_stream_read_async;
ginputstream_class->read_finish = g_socket_input_stream_read_finish;
g_object_class_install_property (gobject_class, PROP_SOCKET,
g_param_spec_object ("socket",
P_("socket"),
P_("The socket that this stream wraps"),
G_TYPE_SOCKET, G_PARAM_CONSTRUCT_ONLY |
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
}
static void
g_socket_input_stream_init (GSocketInputStream *stream)
{
stream->priv = G_TYPE_INSTANCE_GET_PRIVATE (stream, G_TYPE_SOCKET_INPUT_STREAM, GSocketInputStreamPrivate);
}
GSocketInputStream *
_g_socket_input_stream_new (GSocket *socket)
{
return G_SOCKET_INPUT_STREAM (g_object_new (G_TYPE_SOCKET_INPUT_STREAM, "socket", socket, NULL));
}