1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
|
/* GIO - GLib Input, Output and Streaming Library
*
* Copyright (C) 2006-2007 Red Hat, Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser 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.
*
* Author: Alexander Larsson <alexl@redhat.com>
*/
#include "config.h"
#include "gasynchelper.h"
/*< private >
* SECTION:gasynchelper
* @short_description: Asynchronous Helper Functions
* @include: gio/gio.h
* @see_also: #GAsyncReady
*
* Provides helper functions for asynchronous operations.
*
**/
/*************************************************************************
* fd source *
************************************************************************/
typedef struct
{
GSource source;
GPollFD pollfd;
} FDSource;
static gboolean
fd_source_prepare (GSource *source,
gint *timeout)
{
*timeout = -1;
return FALSE;
}
static gboolean
fd_source_check (GSource *source)
{
FDSource *fd_source = (FDSource *)source;
return fd_source->pollfd.revents != 0;
}
static gboolean
fd_source_dispatch (GSource *source,
GSourceFunc callback,
gpointer user_data)
{
GFDSourceFunc func = (GFDSourceFunc)callback;
FDSource *fd_source = (FDSource *)source;
g_warn_if_fail (func != NULL);
return (*func) (fd_source->pollfd.fd, fd_source->pollfd.revents, user_data);
}
static void
fd_source_finalize (GSource *source)
{
}
static gboolean
fd_source_closure_callback (int fd,
GIOCondition condition,
gpointer data)
{
GClosure *closure = data;
GValue params[2] = { G_VALUE_INIT, G_VALUE_INIT };
GValue result_value = G_VALUE_INIT;
gboolean result;
g_value_init (&result_value, G_TYPE_BOOLEAN);
g_value_init (¶ms[0], G_TYPE_INT);
g_value_set_int (¶ms[0], fd);
g_value_init (¶ms[1], G_TYPE_IO_CONDITION);
g_value_set_flags (¶ms[1], condition);
g_closure_invoke (closure, &result_value, 2, params, NULL);
result = g_value_get_boolean (&result_value);
g_value_unset (&result_value);
g_value_unset (¶ms[0]);
g_value_unset (¶ms[1]);
return result;
}
static void
fd_source_closure_marshal (GClosure *closure,
GValue *return_value,
guint n_param_values,
const GValue *param_values,
gpointer invocation_hint,
gpointer marshal_data)
{
GFDSourceFunc callback;
GCClosure *cc = (GCClosure*) closure;
gboolean v_return;
g_return_if_fail (return_value != NULL);
g_return_if_fail (n_param_values == 0);
callback = (GFDSourceFunc) (marshal_data ? marshal_data : cc->callback);
v_return = callback (g_value_get_int (param_values),
g_value_get_flags (param_values + 1),
closure->data);
g_value_set_boolean (return_value, v_return);
}
static GSourceFuncs fd_source_funcs = {
fd_source_prepare,
fd_source_check,
fd_source_dispatch,
fd_source_finalize,
(GSourceFunc)fd_source_closure_callback,
(GSourceDummyMarshal)fd_source_closure_marshal,
};
GSource *
_g_fd_source_new (int fd,
gushort events,
GCancellable *cancellable)
{
GSource *source;
FDSource *fd_source;
source = g_source_new (&fd_source_funcs, sizeof (FDSource));
fd_source = (FDSource *)source;
fd_source->pollfd.fd = fd;
fd_source->pollfd.events = events;
g_source_add_poll (source, &fd_source->pollfd);
if (cancellable)
{
GSource *cancellable_source = g_cancellable_source_new (cancellable);
g_source_set_dummy_callback (cancellable_source);
g_source_add_child_source (source, cancellable_source);
g_source_unref (cancellable_source);
}
return source;
}
|
