gio/gfiledescriptorbased.c

   1 /* GIO - GLib Input, Output and Streaming Library
   2  *
   3  * Copyright (C) 2010 Christian Kellner
   4  *
   5  * This library is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU Lesser General Public
   7  * License as published by the Free Software Foundation; either
   8  * version 2 of the License, or (at your option) any later version.
   9  *
  10  * This library is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * Lesser General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU Lesser General
  16  * Public License along with this library; if not, see <http://www.gnu.org/licenses/>.
  17  *
  18  * Author: Christian Kellner <gicmo@gnome.org>
  19  */
  20
  21 #include "config.h"
  22 #include "gfiledescriptorbased.h"
  23 #include "glibintl.h"
  24
  25
  26 /**
  27  * SECTION:gfiledescriptorbased
  28  * @short_description: Interface for file descriptor based IO
  29  * @include: gio/gfiledescriptorbased.h
  30  * @see_also: #GInputStream, #GOutputStream
  31  *
  32  * #GFileDescriptorBased is implemented by streams (implementations of
  33  * #GInputStream or #GOutputStream) that are based on file descriptors.
  34  *
  35  * Note that `<gio/gfiledescriptorbased.h>` belongs to the UNIX-specific
  36  * GIO interfaces, thus you have to use the `gio-unix-2.0.pc` pkg-config
  37  * file when using it.
  38  *
  39  * Since: 2.24
  40  *
  41  **/
  42
  43 typedef GFileDescriptorBasedIface GFileDescriptorBasedInterface;
  44 G_DEFINE_INTERFACE (GFileDescriptorBased, g_file_descriptor_based, G_TYPE_OBJECT)
  45
  46 static void
  47 g_file_descriptor_based_default_init (GFileDescriptorBasedInterface *iface)
  48 {
  49 }
  50
  51 /**
  52  * g_file_descriptor_based_get_fd:
  53  * @fd_based: a #GFileDescriptorBased.
  54  *
  55  * Gets the underlying file descriptor.
  56  *
  57  * Returns: The file descriptor
  58  *
  59  * Since: 2.24
  60  **/
  61 int
  62 g_file_descriptor_based_get_fd (GFileDescriptorBased *fd_based)
  63 {
  64   GFileDescriptorBasedIface *iface;
  65
  66   g_return_val_if_fail (G_IS_FILE_DESCRIPTOR_BASED (fd_based), 0);
  67
  68   iface = G_FILE_DESCRIPTOR_BASED_GET_IFACE (fd_based);
  69
  70   return (* iface->get_fd) (fd_based);
  71 }