src/tests/thread-test.c

   1 /* $Id$ */
   2
   3 /***
   4   This file is part of PulseAudio.
   5
   6   PulseAudio is free software; you can redistribute it and/or modify
   7   it under the terms of the GNU Lesser General Public License as published
   8   by the Free Software Foundation; either version 2 of the License,
   9   or (at your option) any later version.
  10
  11   PulseAudio is distributed in the hope that it will be useful, but
  12   WITHOUT ANY WARRANTY; without even the implied warranty of
  13   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  14   General Public License for more details.
  15
  16   You should have received a copy of the GNU Lesser General Public License
  17   along with PulseAudio; if not, write to the Free Software
  18   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
  19   USA.
  20 ***/
  21
  22 #ifdef HAVE_CONFIG_H
  23 #include <config.h>
  24 #endif
  25
  26 #include <pulsecore/thread.h>
  27 #include <pulsecore/mutex.h>
  28 #include <pulsecore/once.h>
  29 #include <pulsecore/log.h>
  30 #include <pulsecore/core-util.h>
  31 #include <pulse/xmalloc.h>
  32
  33 static pa_mutex *mutex = NULL;
  34 static pa_cond *cond1 = NULL, *cond2 = NULL;
  35 static pa_tls *tls = NULL;
  36
  37 static int magic_number = 0;
  38
  39 #define THREADS_MAX 20
  40
  41 static void once_func(void) {
  42     pa_log("once!");
  43 }
  44
  45 static pa_once once = PA_ONCE_INIT;
  46
  47 static void thread_func(void *data) {
  48     pa_tls_set(tls, data);
  49
  50     pa_log("thread_func() for %s starting...", (char*) pa_tls_get(tls));
  51
  52     pa_mutex_lock(mutex);
  53
  54     for (;;) {
  55         int k, n;
  56
  57         pa_log("%s waiting ...", (char*) pa_tls_get(tls));
  58
  59         for (;;) {
  60
  61             if (magic_number < 0)
  62                 goto quit;
  63
  64             if (magic_number != 0)
  65                 break;
  66
  67             pa_cond_wait(cond1, mutex);
  68         }
  69
  70         k = magic_number;
  71         magic_number = 0;
  72
  73         pa_mutex_unlock(mutex);
  74
  75         pa_run_once(&once, once_func);
  76
  77         pa_cond_signal(cond2, 0);
  78
  79         pa_log("%s got number %i", (char*) pa_tls_get(tls), k);
  80
  81         /* Spin! */
  82         for (n = 0; n < k; n++)
  83             pa_thread_yield();
  84
  85         pa_mutex_lock(mutex);
  86     }
  87
  88 quit:
  89
  90     pa_mutex_unlock(mutex);
  91
  92     pa_log("thread_func() for %s done...", (char*) pa_tls_get(tls));
  93 }
  94
  95 int main(int argc, char *argv[]) {
  96     int i, k;
  97     pa_thread* t[THREADS_MAX];
  98
  99     assert(pa_thread_is_running(pa_thread_self()));
 100
 101     mutex = pa_mutex_new(FALSE, FALSE);
 102     cond1 = pa_cond_new();
 103     cond2 = pa_cond_new();
 104     tls = pa_tls_new(pa_xfree);
 105
 106     for (i = 0; i < THREADS_MAX; i++) {
 107         t[i] = pa_thread_new(thread_func, pa_sprintf_malloc("Thread #%i", i+1));
 108         assert(t[i]);
 109     }
 110
 111     pa_mutex_lock(mutex);
 112
 113     pa_log("loop-init");
 114
 115     for (k = 0; k < 100; k++) {
 116         assert(magic_number == 0);
 117
 118
 119         magic_number = (int) rand() % 0x10000;
 120
 121         pa_log("iteration %i (%i)", k, magic_number);
 122
 123         pa_cond_signal(cond1, 0);
 124
 125         pa_cond_wait(cond2, mutex);
 126     }
 127
 128     pa_log("loop-exit");
 129
 130     magic_number = -1;
 131     pa_cond_signal(cond1, 1);
 132
 133     pa_mutex_unlock(mutex);
 134
 135     for (i = 0; i < THREADS_MAX; i++)
 136         pa_thread_free(t[i]);
 137
 138     pa_mutex_free(mutex);
 139     pa_cond_free(cond1);
 140     pa_cond_free(cond2);
 141     pa_tls_free(tls);
 142
 143     return 0;
 144 }