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.
35 g_io_channel_init (GIOChannel *channel)
37 channel->channel_flags = 0;
38 channel->ref_count = 1;
43 g_io_channel_ref (GIOChannel *channel)
45 g_return_if_fail (channel != NULL);
51 g_io_channel_unref (GIOChannel *channel)
53 g_return_if_fail (channel != NULL);
56 if (channel->ref_count == 0)
57 channel->funcs->io_free (channel);
61 g_io_channel_read (GIOChannel *channel,
66 g_return_val_if_fail (channel != NULL, G_IO_ERROR_UNKNOWN);
68 return channel->funcs->io_read (channel, buf, count, bytes_read);
72 g_io_channel_write (GIOChannel *channel,
77 g_return_val_if_fail (channel != NULL, G_IO_ERROR_UNKNOWN);
79 return channel->funcs->io_write (channel, buf, count, bytes_written);
83 g_io_channel_seek (GIOChannel *channel,
87 g_return_val_if_fail (channel != NULL, G_IO_ERROR_UNKNOWN);
89 return channel->funcs->io_seek (channel, offset, type);
93 g_io_channel_close (GIOChannel *channel)
95 g_return_if_fail (channel != NULL);
97 channel->funcs->io_close (channel);
101 g_io_add_watch_full (GIOChannel *channel,
103 GIOCondition condition,
106 GDestroyNotify notify)
108 g_return_val_if_fail (channel != NULL, 0);
110 return channel->funcs->io_add_watch (channel, priority, condition,
111 func, user_data, notify);
115 g_io_add_watch (GIOChannel *channel,
116 GIOCondition condition,
120 return g_io_add_watch_full (channel, 0, condition, func, user_data, NULL);