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
186
187
188
189
190
191
192
193
194
195
196
197
198
199
|
/*
DeaDBeeF - ultimate music player for GNU/Linux systems with X11
Copyright (C) 2009-2011 Alexey Yakovenko <waker@users.sourceforge.net>
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, see <http://www.gnu.org/licenses/>.
*/
#include <stdio.h>
#include <string.h>
#include <assert.h>
#include <stdlib.h>
#include "messagepump.h"
#include "threading.h"
#include "playlist.h"
typedef struct message_s {
uint32_t id;
uintptr_t ctx;
uint32_t p1;
uint32_t p2;
struct message_s *next;
} message_t;
enum { MAX_MESSAGES = 100 };
static message_t pool[MAX_MESSAGES];
static message_t *mfree;
static message_t *mqueue;
static message_t *mqtail;
static uintptr_t mutex;
static uintptr_t cond;
static void
messagepump_reset (void);
int
messagepump_init (void) {
messagepump_reset ();
mutex = mutex_create ();
cond = cond_create ();
return 0;
}
void
messagepump_free () {
mutex_lock (mutex);
messagepump_reset ();
mutex_unlock (mutex);
mutex_free (mutex);
cond_free (cond);
}
static void
messagepump_reset (void) {
mqueue = NULL;
mfree = NULL;
mqtail = NULL;
memset (pool, 0, sizeof (pool));
for (int i = 0; i < MAX_MESSAGES; i++) {
pool[i].next = mfree;
mfree = &pool[i];
}
}
int
messagepump_push (uint32_t id, uintptr_t ctx, uint32_t p1, uint32_t p2) {
if (!mfree) {
fprintf (stderr, "WARNING: message queue is full! message ignored (%d %p %d %d)\n", id, (void*)ctx, p1, p2);
return -1;
}
mutex_lock (mutex);
message_t *msg = mfree;
mfree = mfree->next;
if (mqtail) {
mqtail->next = msg;
}
mqtail = msg;
if (!mqueue) {
mqueue = msg;
}
msg->next = NULL;
msg->id = id;
msg->ctx = ctx;
msg->p1 = p1;
msg->p2 = p2;
mutex_unlock (mutex);
cond_signal (cond);
return 0;
}
void
messagepump_wait (void) {
cond_wait (cond, mutex);
mutex_unlock (mutex);
}
int
messagepump_pop (uint32_t *id, uintptr_t *ctx, uint32_t *p1, uint32_t *p2) {
mutex_lock (mutex);
if (!mqueue) {
mutex_unlock (mutex);
return -1;
}
*id = mqueue->id;
*ctx = mqueue->ctx;
*p1 = mqueue->p1;
*p2 = mqueue->p2;
message_t *next = mqueue->next;
mqueue->next = mfree;
mfree = mqueue;
mqueue = next;
if (!mqueue) {
mqtail = NULL;
}
mutex_unlock (mutex);
return 0;
}
int
messagepump_hasmessages (void) {
return mqueue ? 1 : 0;
}
ddb_event_t *
messagepump_event_alloc (uint32_t id) {
int sz = 0;
ddb_event_t *ev;
switch (id) {
case DB_EV_SONGCHANGED:
sz = sizeof (ddb_event_trackchange_t);
break;
case DB_EV_SONGSTARTED:
case DB_EV_SONGFINISHED:
case DB_EV_TRACKINFOCHANGED:
sz = sizeof (ddb_event_track_t);
break;
case DB_EV_SEEKED:
sz = sizeof (ddb_event_playpos_t);
break;
}
assert (("Invalid event %d to use with messagepump_event_alloc, use sendmessage instead\n", id));
ev = malloc (sz);
memset (ev, 0, sz);
ev->event = id;
ev->size = sz;
return ev;
}
void
messagepump_event_free (ddb_event_t *ev) {
switch (ev->event) {
case DB_EV_SONGCHANGED:
{
ddb_event_trackchange_t *tc = (ddb_event_trackchange_t*)ev;
if (tc->from) {
pl_item_unref ((playItem_t *)tc->from);
}
if (tc->to) {
pl_item_unref ((playItem_t *)tc->to);
}
}
break;
case DB_EV_SONGSTARTED:
case DB_EV_SONGFINISHED:
case DB_EV_TRACKINFOCHANGED:
{
ddb_event_track_t *tc = (ddb_event_track_t*)ev;
if (tc->track) {
pl_item_unref ((playItem_t *)tc->track);
}
}
break;
case DB_EV_SEEKED:
{
ddb_event_playpos_t *tc = (ddb_event_playpos_t*)ev;
if (tc->track) {
pl_item_unref ((playItem_t *)tc->track);
}
}
break;
}
free (ev);
}
int
messagepump_push_event (ddb_event_t *ev, uint32_t p1, uint32_t p2) {
return messagepump_push (ev->event, (uintptr_t)ev, p1, p2);
}
|
