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
|
/* $Id$ */
/***
This file is part of PulseAudio.
PulseAudio 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.
PulseAudio 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 Lesser General Public License
along with PulseAudio; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
USA.
***/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <pulsecore/thread.h>
#include <pulsecore/mutex.h>
#include <pulsecore/once.h>
#include <pulsecore/log.h>
#include <pulsecore/core-util.h>
#include <pulse/xmalloc.h>
static pa_mutex *mutex = NULL;
static pa_cond *cond1 = NULL, *cond2 = NULL;
static pa_tls *tls = NULL;
static int magic_number = 0;
#define THREADS_MAX 20
static void once_func(void) {
pa_log("once!");
}
static pa_once_t once = PA_ONCE_INIT;
static void thread_func(void *data) {
pa_tls_set(tls, data);
pa_log("thread_func() for %s starting...", (char*) pa_tls_get(tls));
pa_mutex_lock(mutex);
for (;;) {
int k, n;
pa_log("%s waiting ...", (char*) pa_tls_get(tls));
for (;;) {
if (magic_number < 0)
goto quit;
if (magic_number != 0)
break;
pa_cond_wait(cond1, mutex);
}
k = magic_number;
magic_number = 0;
pa_mutex_unlock(mutex);
pa_once(&once, once_func);
pa_cond_signal(cond2, 0);
pa_log("%s got number %i", (char*) pa_tls_get(tls), k);
/* Spin! */
for (n = 0; n < k; n++)
pa_thread_yield();
pa_mutex_lock(mutex);
}
quit:
pa_mutex_unlock(mutex);
pa_log("thread_func() for %s done...", (char*) pa_tls_get(tls));
}
int main(int argc, char *argv[]) {
int i, k;
pa_thread* t[THREADS_MAX];
assert(pa_thread_is_running(pa_thread_self()));
mutex = pa_mutex_new(0);
cond1 = pa_cond_new();
cond2 = pa_cond_new();
tls = pa_tls_new(pa_xfree);
for (i = 0; i < THREADS_MAX; i++) {
t[i] = pa_thread_new(thread_func, pa_sprintf_malloc("Thread #%i", i+1));
assert(t[i]);
}
pa_mutex_lock(mutex);
pa_log("loop-init");
for (k = 0; k < 100; k++) {
assert(magic_number == 0);
magic_number = (int) rand() % 0x10000;
pa_log("iteration %i (%i)", k, magic_number);
pa_cond_signal(cond1, 0);
pa_cond_wait(cond2, mutex);
}
pa_log("loop-exit");
magic_number = -1;
pa_cond_signal(cond1, 1);
pa_mutex_unlock(mutex);
for (i = 0; i < THREADS_MAX; i++)
pa_thread_free(t[i]);
pa_mutex_free(mutex);
pa_cond_free(cond1);
pa_cond_free(cond2);
pa_tls_free(tls);
return 0;
}
|
