1 /* GLIB - Library of useful routines for C programming
2 * Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
4 * giochannel.c: IO Channel abstraction
5 * Copyright 1998 Owen Taylor
7 * This library is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Library General Public
9 * License as published by the Free Software Foundation; either
10 * version 2 of the License, or (at your option) any later version.
12 * This library is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Library General Public License for more details.
17 * You should have received a copy of the GNU Library General Public
18 * License along with this library; if not, write to the
19 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
20 * Boston, MA 02111-1307, USA.
24 * Modified by the GLib Team and others 1997-1999. See the AUTHORS
25 * file for a list of people on the GLib Team. See the ChangeLog
26 * files for a list of changes. These files are distributed with
27 * GLib at ftp://ftp.gtk.org/pub/gtk/.
42 g_io_channel_init (GIOChannel *channel)
44 channel->channel_flags = 0;
45 channel->ref_count = 1;
50 g_io_channel_ref (GIOChannel *channel)
52 g_return_if_fail (channel != NULL);
58 g_io_channel_unref (GIOChannel *channel)
60 g_return_if_fail (channel != NULL);
63 if (channel->ref_count == 0)
64 channel->funcs->io_free (channel);
68 g_io_channel_read (GIOChannel *channel,
73 g_return_val_if_fail (channel != NULL, G_IO_ERROR_UNKNOWN);
75 return channel->funcs->io_read (channel, buf, count, bytes_read);
79 g_io_channel_write (GIOChannel *channel,
84 g_return_val_if_fail (channel != NULL, G_IO_ERROR_UNKNOWN);
86 return channel->funcs->io_write (channel, buf, count, bytes_written);
90 g_io_channel_seek (GIOChannel *channel,
94 g_return_val_if_fail (channel != NULL, G_IO_ERROR_UNKNOWN);
96 return channel->funcs->io_seek (channel, offset, type);
100 g_io_channel_close (GIOChannel *channel)
102 g_return_if_fail (channel != NULL);
104 channel->funcs->io_close (channel);
108 g_io_add_watch_full (GIOChannel *channel,
110 GIOCondition condition,
113 GDestroyNotify notify)
115 g_return_val_if_fail (channel != NULL, 0);
117 return channel->funcs->io_add_watch (channel, priority, condition,
118 func, user_data, notify);
122 g_io_add_watch (GIOChannel *channel,
123 GIOCondition condition,
127 return g_io_add_watch_full (channel, 0, condition, func, user_data, NULL);