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1 office 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 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  
30 G_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 */
44 typedef struct _GCancellableClass GCancellableClass;
45 typedef struct _GCancellablePrivate GCancellablePrivate;
46  
47 struct _GCancellable
48 {
49 GObject parent_instance;
50  
51 /*< private >*/
52 GCancellablePrivate *priv;
53 };
54  
55 struct _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  
70 GLIB_AVAILABLE_IN_ALL
71 GType g_cancellable_get_type (void) G_GNUC_CONST;
72  
73 GLIB_AVAILABLE_IN_ALL
74 GCancellable *g_cancellable_new (void);
75  
76 /* These are only safe to call inside a cancellable op */
77 GLIB_AVAILABLE_IN_ALL
78 gboolean g_cancellable_is_cancelled (GCancellable *cancellable);
79 GLIB_AVAILABLE_IN_ALL
80 gboolean g_cancellable_set_error_if_cancelled (GCancellable *cancellable,
81 GError **error);
82  
83 GLIB_AVAILABLE_IN_ALL
84 int g_cancellable_get_fd (GCancellable *cancellable);
85 GLIB_AVAILABLE_IN_ALL
86 gboolean g_cancellable_make_pollfd (GCancellable *cancellable,
87 GPollFD *pollfd);
88 GLIB_AVAILABLE_IN_ALL
89 void g_cancellable_release_fd (GCancellable *cancellable);
90  
91 GLIB_AVAILABLE_IN_ALL
92 GSource * g_cancellable_source_new (GCancellable *cancellable);
93  
94 GLIB_AVAILABLE_IN_ALL
95 GCancellable *g_cancellable_get_current (void);
96 GLIB_AVAILABLE_IN_ALL
97 void g_cancellable_push_current (GCancellable *cancellable);
98 GLIB_AVAILABLE_IN_ALL
99 void g_cancellable_pop_current (GCancellable *cancellable);
100 GLIB_AVAILABLE_IN_ALL
101 void g_cancellable_reset (GCancellable *cancellable);
102 GLIB_AVAILABLE_IN_ALL
103 gulong g_cancellable_connect (GCancellable *cancellable,
104 GCallback callback,
105 gpointer data,
106 GDestroyNotify data_destroy_func);
107 GLIB_AVAILABLE_IN_ALL
108 void g_cancellable_disconnect (GCancellable *cancellable,
109 gulong handler_id);
110  
111  
112 /* This is safe to call from another thread */
113 GLIB_AVAILABLE_IN_ALL
114 void g_cancellable_cancel (GCancellable *cancellable);
115  
116 G_END_DECLS
117  
118 #endif /* __G_CANCELLABLE_H__ */