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
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
|
/*
* Copyright (C) 2003-2013 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 "config.h"
#include "UpdateGlue.hxx"
#include "UpdateQueue.hxx"
#include "UpdateWalk.hxx"
#include "UpdateRemove.hxx"
#include "Mapper.hxx"
#include "DatabaseSimple.hxx"
#include "Idle.hxx"
#include "GlobalEvents.hxx"
extern "C" {
#include "stats.h"
}
#include "Main.hxx"
#include "Partition.hxx"
#include "mpd_error.h"
#include <glib.h>
#include <assert.h>
#undef G_LOG_DOMAIN
#define G_LOG_DOMAIN "update"
static enum update_progress {
UPDATE_PROGRESS_IDLE = 0,
UPDATE_PROGRESS_RUNNING = 1,
UPDATE_PROGRESS_DONE = 2
} progress;
static bool modified;
static GThread *update_thr;
static const unsigned update_task_id_max = 1 << 15;
static unsigned update_task_id;
/* XXX this flag is passed to update_task() */
static bool discard;
unsigned
isUpdatingDB(void)
{
return (progress != UPDATE_PROGRESS_IDLE) ? update_task_id : 0;
}
static void * update_task(void *_path)
{
const char *path = (const char *)_path;
if (path != NULL && *path != 0)
g_debug("starting: %s", path);
else
g_debug("starting");
modified = update_walk(path, discard);
if (modified || !db_exists()) {
GError *error = NULL;
if (!db_save(&error)) {
g_warning("Failed to save database: %s",
error->message);
g_error_free(error);
}
}
if (path != NULL && *path != 0)
g_debug("finished: %s", path);
else
g_debug("finished");
g_free(_path);
progress = UPDATE_PROGRESS_DONE;
GlobalEvents::Emit(GlobalEvents::UPDATE);
return NULL;
}
static void
spawn_update_task(const char *path)
{
GError *e = NULL;
assert(g_thread_self() == main_task);
progress = UPDATE_PROGRESS_RUNNING;
modified = false;
update_thr = g_thread_create(update_task, g_strdup(path), TRUE, &e);
if (update_thr == NULL)
MPD_ERROR("Failed to spawn update task: %s", e->message);
if (++update_task_id > update_task_id_max)
update_task_id = 1;
g_debug("spawned thread for update job id %i", update_task_id);
}
unsigned
update_enqueue(const char *path, bool _discard)
{
assert(g_thread_self() == main_task);
if (!db_is_simple() || !mapper_has_music_directory())
return 0;
if (progress != UPDATE_PROGRESS_IDLE) {
unsigned next_task_id =
update_queue_push(path, discard, update_task_id);
if (next_task_id == 0)
return 0;
return next_task_id > update_task_id_max ? 1 : next_task_id;
}
discard = _discard;
spawn_update_task(path);
idle_add(IDLE_UPDATE);
return update_task_id;
}
/**
* Called in the main thread after the database update is finished.
*/
static void update_finished_event(void)
{
char *path;
assert(progress == UPDATE_PROGRESS_DONE);
g_thread_join(update_thr);
idle_add(IDLE_UPDATE);
if (modified) {
/* send "idle" events */
global_partition->playlist.FullIncrementVersions();
idle_add(IDLE_DATABASE);
}
path = update_queue_shift(&discard);
if (path != NULL) {
/* schedule the next path */
spawn_update_task(path);
g_free(path);
} else {
progress = UPDATE_PROGRESS_IDLE;
stats_update();
}
}
void update_global_init(void)
{
GlobalEvents::Register(GlobalEvents::UPDATE, update_finished_event);
update_remove_global_init();
update_walk_global_init();
}
void update_global_finish(void)
{
update_walk_global_finish();
}
|
