| /* GLIB - Library of useful routines for C programming |
| * Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald |
| * |
| * giochannel.c: IO Channel abstraction |
| * Copyright 1998 Owen Taylor |
| * |
| * This library is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU Library 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 |
| * Library General Public License for more details. |
| * |
| * You should have received a copy of the GNU Library 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. |
| */ |
| |
| #include "glib.h" |
| #include <unistd.h> |
| |
| typedef struct _GIOChannelPrivate GIOChannelPrivate; |
| |
| struct _GIOChannelPrivate { |
| GIOChannel channel; |
| GIOFuncs *funcs; |
| guint ref_count; |
| gboolean closed; |
| }; |
| |
| GIOChannel * |
| g_io_channel_new (GIOFuncs *funcs, |
| gpointer channel_data) |
| { |
| GIOChannelPrivate *result; |
| GIOChannel *channel; |
| |
| g_return_val_if_fail (funcs != NULL, NULL); |
| |
| result = g_new (GIOChannelPrivate, 1); |
| channel = (GIOChannel *)result; |
| |
| result->funcs = funcs; |
| result->ref_count = 1; |
| result->closed = FALSE; |
| |
| channel->channel_data = channel_data; |
| return channel; |
| } |
| |
| |
| void |
| g_io_channel_ref (GIOChannel *channel) |
| { |
| GIOChannelPrivate *private; |
| g_return_if_fail (channel != NULL); |
| |
| private = (GIOChannelPrivate *)channel; |
| |
| private->ref_count++; |
| } |
| |
| void |
| g_io_channel_unref (GIOChannel *channel) |
| { |
| GIOChannelPrivate *private; |
| g_return_if_fail (channel != NULL); |
| |
| private = (GIOChannelPrivate *)channel; |
| |
| private->ref_count--; |
| if (private->ref_count == 0) |
| { |
| /* We don't want to close the channel here, because |
| * the channel may just be wrapping a file or socket |
| * that the app is independently manipulating. |
| */ |
| private->funcs->io_free (channel); |
| g_free (private); |
| } |
| } |
| |
| GIOError |
| g_io_channel_read (GIOChannel *channel, |
| gchar *buf, |
| guint count, |
| guint *bytes_read) |
| { |
| GIOChannelPrivate *private = (GIOChannelPrivate *)channel; |
| |
| g_return_val_if_fail (channel != NULL, G_IO_ERROR_UNKNOWN); |
| g_return_val_if_fail (!private->closed, G_IO_ERROR_UNKNOWN); |
| |
| return private->funcs->io_read (channel, buf, count, bytes_read); |
| } |
| |
| GIOError |
| g_io_channel_write (GIOChannel *channel, |
| gchar *buf, |
| guint count, |
| guint *bytes_written) |
| { |
| GIOChannelPrivate *private = (GIOChannelPrivate *)channel; |
| |
| g_return_val_if_fail (channel != NULL, G_IO_ERROR_UNKNOWN); |
| g_return_val_if_fail (!private->closed, G_IO_ERROR_UNKNOWN); |
| |
| return private->funcs->io_write (channel, buf, count, bytes_written); |
| } |
| |
| GIOError |
| g_io_channel_seek (GIOChannel *channel, |
| gint offset, |
| GSeekType type) |
| { |
| GIOChannelPrivate *private = (GIOChannelPrivate *)channel; |
| |
| g_return_val_if_fail (channel != NULL, G_IO_ERROR_UNKNOWN); |
| g_return_val_if_fail (!private->closed, G_IO_ERROR_UNKNOWN); |
| |
| return private->funcs->io_seek (channel, offset, type); |
| } |
| |
| void |
| g_io_channel_close (GIOChannel *channel) |
| { |
| GIOChannelPrivate *private = (GIOChannelPrivate *)channel; |
| |
| g_return_if_fail (channel != NULL); |
| g_return_if_fail (!private->closed); |
| |
| private->closed = TRUE; |
| private->funcs->io_close (channel); |
| } |
| |
| guint |
| g_io_add_watch_full (GIOChannel *channel, |
| gint priority, |
| GIOCondition condition, |
| GIOFunc func, |
| gpointer user_data, |
| GDestroyNotify notify) |
| { |
| GIOChannelPrivate *private = (GIOChannelPrivate *)channel; |
| |
| g_return_val_if_fail (channel != NULL, 0); |
| g_return_val_if_fail (!private->closed, 0); |
| |
| return private->funcs->io_add_watch (channel, priority, condition, |
| func, user_data, notify); |
| } |
| |
| guint |
| g_io_add_watch (GIOChannel *channel, |
| GIOCondition condition, |
| GIOFunc func, |
| gpointer user_data) |
| { |
| return g_io_add_watch_full (channel, 0, condition, func, user_data, NULL); |
| } |