gio/gsocketoutputstream.c

   1 /*  GIO - GLib Input, Output and Streaming Library
   2  *
   3  * Copyright © 2008 Christian Kellner, Samuel Cormier-Iijima
   4  *           © 2009 codethink
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General
  17  * Public License along with this library; if not, write to the
  18  * Free Software Foundation, Inc., 59 Temple Place, Suite 330,
  19  * Boston, MA 02111-1307, USA.
  20  *
  21  * Authors: Christian Kellner <gicmo@gnome.org>
  22  *          Samuel Cormier-Iijima <sciyoshi@gmail.com>
  23  *          Ryan Lortie <desrt@desrt.ca>
  24  */
  25
  26 #include "config.h"
  27 #include "goutputstream.h"
  28 #include "gsocketoutputstream.h"
  29 #include "gsocket.h"
  30
  31 #include <gio/gsimpleasyncresult.h>
  32 #include <gio/gcancellable.h>
  33 #include <gio/gioerror.h>
  34 #include "glibintl.h"
  35
  36 #include "gioalias.h"
  37
  38 #define g_socket_output_stream_get_type _g_socket_output_stream_get_type
  39 G_DEFINE_TYPE (GSocketOutputStream, g_socket_output_stream, G_TYPE_OUTPUT_STREAM);
  40
  41 enum
  42 {
  43   PROP_0,
  44   PROP_SOCKET
  45 };
  46
  47 struct _GSocketOutputStreamPrivate
  48 {
  49   GSocket *socket;
  50
  51   /* pending operation metadata */
  52   GSimpleAsyncResult *result;
  53   GCancellable *cancellable;
  54   gconstpointer buffer;
  55   gsize count;
  56 };
  57
  58 static void
  59 g_socket_output_stream_get_property (GObject    *object,
  60                                      guint       prop_id,
  61                                      GValue     *value,
  62                                      GParamSpec *pspec)
  63 {
  64   GSocketOutputStream *stream = G_SOCKET_OUTPUT_STREAM (object);
  65
  66   switch (prop_id)
  67     {
  68       case PROP_SOCKET:
  69         g_value_set_object (value, stream->priv->socket);
  70         break;
  71
  72       default:
  73         G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
  74     }
  75 }
  76
  77 static void
  78 g_socket_output_stream_set_property (GObject      *object,
  79                                      guint         prop_id,
  80                                      const GValue *value,
  81                                      GParamSpec   *pspec)
  82 {
  83   GSocketOutputStream *stream = G_SOCKET_OUTPUT_STREAM (object);
  84
  85   switch (prop_id)
  86     {
  87       case PROP_SOCKET:
  88         stream->priv->socket = g_value_dup_object (value);
  89         break;
  90
  91       default:
  92         G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
  93     }
  94 }
  95
  96 static void
  97 g_socket_output_stream_finalize (GObject *object)
  98 {
  99   GSocketOutputStream *stream = G_SOCKET_OUTPUT_STREAM (object);
 100
 101   if (stream->priv->socket)
 102     g_object_unref (stream->priv->socket);
 103
 104   if (G_OBJECT_CLASS (g_socket_output_stream_parent_class)->finalize)
 105     (*G_OBJECT_CLASS (g_socket_output_stream_parent_class)->finalize) (object);
 106 }
 107
 108 static gssize
 109 g_socket_output_stream_write (GOutputStream  *stream,
 110                               const void     *buffer,
 111                               gsize           count,
 112                               GCancellable   *cancellable,
 113                               GError        **error)
 114 {
 115   GSocketOutputStream *onput_stream = G_SOCKET_OUTPUT_STREAM (stream);
 116
 117   return g_socket_send (onput_stream->priv->socket, buffer, count,
 118                         cancellable, error);
 119 }
 120
 121 static gboolean
 122 g_socket_output_stream_write_ready (GSocket *socket,
 123                                     GIOCondition condition,
 124                                     GSocketOutputStream *stream)
 125 {
 126   GSimpleAsyncResult *simple;
 127   GError *error = NULL;
 128   gssize result;
 129
 130   result = g_socket_send (stream->priv->socket,
 131                           stream->priv->buffer,
 132                           stream->priv->count,
 133                           stream->priv->cancellable,
 134                           &error);
 135
 136   if (g_error_matches (error, G_IO_ERROR, G_IO_ERROR_WOULD_BLOCK))
 137     return TRUE;
 138
 139   simple = stream->priv->result;
 140   stream->priv->result = NULL;
 141
 142   if (result >= 0)
 143     g_simple_async_result_set_op_res_gssize (simple, result);
 144
 145   if (error)
 146     {
 147       g_simple_async_result_set_from_error (simple, error);
 148       g_error_free (error);
 149     }
 150
 151   if (stream->priv->cancellable)
 152     g_object_unref (stream->priv->cancellable);
 153
 154   g_simple_async_result_complete (simple);
 155   g_object_unref (simple);
 156
 157   return FALSE;
 158 }
 159
 160 static void
 161 g_socket_output_stream_write_async (GOutputStream        *stream,
 162                                     const void           *buffer,
 163                                     gsize                 count,
 164                                     gint                  io_priority,
 165                                     GCancellable         *cancellable,
 166                                     GAsyncReadyCallback   callback,
 167                                     gpointer              user_data)
 168 {
 169   GSocketOutputStream *output_stream = G_SOCKET_OUTPUT_STREAM (stream);
 170   GSource *source;
 171
 172   g_assert (output_stream->priv->result == NULL);
 173
 174   output_stream->priv->result =
 175     g_simple_async_result_new (G_OBJECT (stream), callback, user_data,
 176                                g_socket_output_stream_write_async);
 177   if (cancellable)
 178     g_object_ref (cancellable);
 179   output_stream->priv->cancellable = cancellable;
 180   output_stream->priv->buffer = buffer;
 181   output_stream->priv->count = count;
 182
 183   source = g_socket_create_source (output_stream->priv->socket,
 184                                    G_IO_OUT | G_IO_HUP | G_IO_ERR,
 185                                    cancellable);
 186   g_source_set_callback (source,
 187                          (GSourceFunc) g_socket_output_stream_write_ready,
 188                          g_object_ref (output_stream), g_object_unref);
 189   g_source_attach (source, g_main_context_get_thread_default ());
 190   g_source_unref (source);
 191 }
 192
 193 static gssize
 194 g_socket_output_stream_write_finish (GOutputStream  *stream,
 195                                      GAsyncResult   *result,
 196                                      GError        **error)
 197 {
 198   GSimpleAsyncResult *simple;
 199   gssize count;
 200
 201   g_return_val_if_fail (G_IS_SOCKET_OUTPUT_STREAM (stream), -1);
 202
 203   simple = G_SIMPLE_ASYNC_RESULT (result);
 204
 205   g_warn_if_fail (g_simple_async_result_get_source_tag (simple) == g_socket_output_stream_write_async);
 206
 207   count = g_simple_async_result_get_op_res_gssize (simple);
 208
 209   return count;
 210 }
 211
 212 static void
 213 g_socket_output_stream_class_init (GSocketOutputStreamClass *klass)
 214 {
 215   GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
 216   GOutputStreamClass *goutputstream_class = G_OUTPUT_STREAM_CLASS (klass);
 217
 218   g_type_class_add_private (klass, sizeof (GSocketOutputStreamPrivate));
 219
 220   gobject_class->finalize = g_socket_output_stream_finalize;
 221   gobject_class->get_property = g_socket_output_stream_get_property;
 222   gobject_class->set_property = g_socket_output_stream_set_property;
 223
 224   goutputstream_class->write_fn = g_socket_output_stream_write;
 225   goutputstream_class->write_async = g_socket_output_stream_write_async;
 226   goutputstream_class->write_finish = g_socket_output_stream_write_finish;
 227
 228   g_object_class_install_property (gobject_class, PROP_SOCKET,
 229                                    g_param_spec_object ("socket",
 230                                                         P_("socket"),
 231                                                         P_("The socket that this stream wraps"),
 232                                                         G_TYPE_SOCKET, G_PARAM_CONSTRUCT_ONLY |
 233                                                         G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
 234 }
 235
 236 static void
 237 g_socket_output_stream_init (GSocketOutputStream *stream)
 238 {
 239   stream->priv = G_TYPE_INSTANCE_GET_PRIVATE (stream, G_TYPE_SOCKET_OUTPUT_STREAM, GSocketOutputStreamPrivate);
 240 }
 241
 242 GSocketOutputStream *
 243 _g_socket_output_stream_new (GSocket *socket)
 244 {
 245   return G_SOCKET_OUTPUT_STREAM (g_object_new (G_TYPE_SOCKET_OUTPUT_STREAM, "socket", socket, NULL));
 246 }
 247
 248 #define __G_SOCKET_OUTPUT_STREAM_C__
 249 #include "gioaliasdef.c"