1/* GIO - GLib Input, Output and Streaming Library
2 *
3 * Copyright (C) 2006-2007 Red Hat, Inc.
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 2.1 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: Alexander Larsson <alexl@redhat.com>
19 */
20
21#ifndef __G_CANCELLABLE_H__
22#define __G_CANCELLABLE_H__
23
24#if !defined (__GIO_GIO_H_INSIDE__) && !defined (GIO_COMPILATION)
25#error "Only <gio/gio.h> can be included directly."
26#endif
27
28#include <gio/giotypes.h>
29
30G_BEGIN_DECLS
31
32#define G_TYPE_CANCELLABLE (g_cancellable_get_type ())
33#define G_CANCELLABLE(o) (G_TYPE_CHECK_INSTANCE_CAST ((o), G_TYPE_CANCELLABLE, GCancellable))
34#define G_CANCELLABLE_CLASS(k) (G_TYPE_CHECK_CLASS_CAST((k), G_TYPE_CANCELLABLE, GCancellableClass))
35#define G_IS_CANCELLABLE(o) (G_TYPE_CHECK_INSTANCE_TYPE ((o), G_TYPE_CANCELLABLE))
36#define G_IS_CANCELLABLE_CLASS(k) (G_TYPE_CHECK_CLASS_TYPE ((k), G_TYPE_CANCELLABLE))
37#define G_CANCELLABLE_GET_CLASS(o) (G_TYPE_INSTANCE_GET_CLASS ((o), G_TYPE_CANCELLABLE, GCancellableClass))
38
39/**
40 * GCancellable:
41 *
42 * Allows actions to be cancelled.
43 */
44typedef struct _GCancellableClass GCancellableClass;
45typedef struct _GCancellablePrivate GCancellablePrivate;
46
47struct _GCancellable
48{
49 GObject parent_instance;
50
51 /*< private >*/
52 GCancellablePrivate *priv;
53};
54
55struct _GCancellableClass
56{
57 GObjectClass parent_class;
58
59 void (* cancelled) (GCancellable *cancellable);
60
61 /*< private >*/
62 /* Padding for future expansion */
63 void (*_g_reserved1) (void);
64 void (*_g_reserved2) (void);
65 void (*_g_reserved3) (void);
66 void (*_g_reserved4) (void);
67 void (*_g_reserved5) (void);
68};
69
70GLIB_AVAILABLE_IN_ALL
71GType g_cancellable_get_type (void) G_GNUC_CONST;
72
73GLIB_AVAILABLE_IN_ALL
74GCancellable *g_cancellable_new (void);
75
76/* These are only safe to call inside a cancellable op */
77GLIB_AVAILABLE_IN_ALL
78gboolean g_cancellable_is_cancelled (GCancellable *cancellable);
79GLIB_AVAILABLE_IN_ALL
80gboolean g_cancellable_set_error_if_cancelled (GCancellable *cancellable,
81 GError **error);
82
83GLIB_AVAILABLE_IN_ALL
84int g_cancellable_get_fd (GCancellable *cancellable);
85GLIB_AVAILABLE_IN_ALL
86gboolean g_cancellable_make_pollfd (GCancellable *cancellable,
87 GPollFD *pollfd);
88GLIB_AVAILABLE_IN_ALL
89void g_cancellable_release_fd (GCancellable *cancellable);
90
91GLIB_AVAILABLE_IN_ALL
92GSource * g_cancellable_source_new (GCancellable *cancellable);
93
94GLIB_AVAILABLE_IN_ALL
95GCancellable *g_cancellable_get_current (void);
96GLIB_AVAILABLE_IN_ALL
97void g_cancellable_push_current (GCancellable *cancellable);
98GLIB_AVAILABLE_IN_ALL
99void g_cancellable_pop_current (GCancellable *cancellable);
100GLIB_AVAILABLE_IN_ALL
101void g_cancellable_reset (GCancellable *cancellable);
102GLIB_AVAILABLE_IN_ALL
103gulong g_cancellable_connect (GCancellable *cancellable,
104 GCallback callback,
105 gpointer data,
106 GDestroyNotify data_destroy_func);
107GLIB_AVAILABLE_IN_ALL
108void g_cancellable_disconnect (GCancellable *cancellable,
109 gulong handler_id);
110
111
112/* This is safe to call from another thread */
113GLIB_AVAILABLE_IN_ALL
114void g_cancellable_cancel (GCancellable *cancellable);
115
116G_END_DECLS
117
118#endif /* __G_CANCELLABLE_H__ */
119

source code of gtk/subprojects/glib/gio/gcancellable.h