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
|
/*
* Copyright (C) 2003-2009 The Music Player Daemon Project
* http://www.musicpd.org
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include "state_file.h"
#include "output_state.h"
#include "playlist.h"
#include "volume.h"
#include <glib.h>
#include <assert.h>
#include <string.h>
#include <errno.h>
#undef G_LOG_DOMAIN
#define G_LOG_DOMAIN "state_file"
static char *state_file_path;
/** the GLib source id for the save timer */
static guint save_state_source_id;
static void
state_file_write(void)
{
FILE *fp;
if (state_file_path == NULL)
return;
fp = fopen(state_file_path, "w");
if (G_UNLIKELY(!fp)) {
g_warning("failed to create %s: %s",
state_file_path, strerror(errno));
return;
}
save_sw_volume_state(fp);
saveAudioDevicesState(fp);
savePlaylistState(fp);
while(fclose(fp) && errno == EINTR) /* nothing */;
}
static void
state_file_read(void)
{
FILE *fp;
assert(state_file_path != NULL);
g_debug("Saving state file");
fp = fopen(state_file_path, "r");
if (G_UNLIKELY(!fp)) {
g_warning("failed to open %s: %s",
state_file_path, strerror(errno));
return;
}
read_sw_volume_state(fp);
rewind(fp);
readAudioDevicesState(fp);
rewind(fp);
readPlaylistState(fp);
while(fclose(fp) && errno == EINTR) /* nothing */;
}
/**
* This function is called every 5 minutes by the GLib main loop, and
* saves the state file.
*/
static gboolean
timer_save_state_file(G_GNUC_UNUSED gpointer data)
{
state_file_write();
return true;
}
void
state_file_init(const char *path)
{
assert(state_file_path == NULL);
if (path == NULL)
return;
state_file_path = g_strdup(path);
state_file_read();
save_state_source_id = g_timeout_add(5 * 60 * 1000,
timer_save_state_file, NULL);
}
void
state_file_finish(void)
{
if (save_state_source_id != 0)
g_source_remove(save_state_source_id);
if (state_file_path != NULL)
state_file_write();
g_free(state_file_path);
}
|
