1 /* GIO - GLib Input, Output and Streaming Library
3 * Copyright (C) 2006-2007 Red Hat, Inc.
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.
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.
15 * You should have received a copy of the GNU Lesser General
16 * Public License along with this library; if not, write to the
17 * Free Software Foundation, Inc., 59 Temple Place, Suite 330,
18 * Boston, MA 02111-1307, USA.
20 * Author: Alexander Larsson <alexl@redhat.com>
25 #include "gasynchelper.h"
30 * SECTION:gasynchelper
31 * @short_description: Asynchronous Helper Functions
33 * @see_also: #GAsyncReady
35 * Provides helper functions for asynchronous operations.
39 /*************************************************************************
41 ************************************************************************/
47 GCancellable *cancellable;
52 fd_source_prepare (GSource *source,
55 FDSource *fd_source = (FDSource *)source;
58 return g_cancellable_is_cancelled (fd_source->cancellable);
62 fd_source_check (GSource *source)
64 FDSource *fd_source = (FDSource *)source;
67 g_cancellable_is_cancelled (fd_source->cancellable) ||
68 fd_source->pollfd.revents != 0;
72 fd_source_dispatch (GSource *source,
77 GFDSourceFunc func = (GFDSourceFunc)callback;
78 FDSource *fd_source = (FDSource *)source;
80 g_warn_if_fail (func != NULL);
82 return (*func) (user_data, fd_source->pollfd.revents, fd_source->pollfd.fd);
86 fd_source_finalize (GSource *source)
88 FDSource *fd_source = (FDSource *)source;
90 if (fd_source->cancelled_tag)
91 g_cancellable_disconnect (fd_source->cancellable,
92 fd_source->cancelled_tag);
94 if (fd_source->cancellable)
95 g_object_unref (fd_source->cancellable);
98 static GSourceFuncs fd_source_funcs = {
105 /* Might be called on another thread */
107 fd_source_cancelled_cb (GCancellable *cancellable,
110 /* Wake up the mainloop in case we're waiting on async calls with FDSource */
111 g_main_context_wakeup (NULL);
115 _g_fd_source_new (int fd,
117 GCancellable *cancellable)
122 source = g_source_new (&fd_source_funcs, sizeof (FDSource));
123 fd_source = (FDSource *)source;
126 fd_source->cancellable = g_object_ref (cancellable);
128 fd_source->pollfd.fd = fd;
129 fd_source->pollfd.events = events;
130 g_source_add_poll (source, &fd_source->pollfd);
133 fd_source->cancelled_tag =
134 g_cancellable_connect (cancellable,
135 (GCallback)fd_source_cancelled_cb,