src/tests/thread-test.c

   1 /***
   2   This file is part of PulseAudio.
   3
   4   PulseAudio is free software; you can redistribute it and/or modify
   5   it under the terms of the GNU Lesser General Public License as published
   6   by the Free Software Foundation; either version 2.1 of the License,
   7   or (at your option) any later version.
   8
   9   PulseAudio is distributed in the hope that it will be useful, but
  10   WITHOUT ANY WARRANTY; without even the implied warranty of
  11   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  12   General Public License for more details.
  13
  14   You should have received a copy of the GNU Lesser General Public License
  15   along with PulseAudio; if not, write to the Free Software
  16   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
  17   USA.
  18 ***/
  19
  20 #ifdef HAVE_CONFIG_H
  21 #include <config.h>
  22 #endif
  23
  24 #include <pulsecore/thread.h>
  25 #include <pulsecore/mutex.h>
  26 #include <pulsecore/once.h>
  27 #include <pulsecore/log.h>
  28 #include <pulsecore/core-util.h>
  29 #include <pulse/xmalloc.h>
  30
  31 static pa_mutex *mutex = NULL;
  32 static pa_cond *cond1 = NULL, *cond2 = NULL;
  33 static pa_tls *tls = NULL;
  34
  35 static int magic_number = 0;
  36
  37 #define THREADS_MAX 20
  38
  39 static void once_func(void) {
  40     pa_log("once!");
  41 }
  42
  43 static pa_once once = PA_ONCE_INIT;
  44
  45 static void thread_func(void *data) {
  46     pa_tls_set(tls, data);
  47
  48     pa_log("thread_func() for %s starting...", (char*) pa_tls_get(tls));
  49
  50     pa_mutex_lock(mutex);
  51
  52     for (;;) {
  53         int k, n;
  54
  55         pa_log("%s waiting ...", (char*) pa_tls_get(tls));
  56
  57         for (;;) {
  58
  59             if (magic_number < 0)
  60                 goto quit;
  61
  62             if (magic_number != 0)
  63                 break;
  64
  65             pa_cond_wait(cond1, mutex);
  66         }
  67
  68         k = magic_number;
  69         magic_number = 0;
  70
  71         pa_mutex_unlock(mutex);
  72
  73         pa_run_once(&once, once_func);
  74
  75         pa_cond_signal(cond2, 0);
  76
  77         pa_log("%s got number %i", (char*) pa_tls_get(tls), k);
  78
  79         /* Spin! */
  80         for (n = 0; n < k; n++)
  81             pa_thread_yield();
  82
  83         pa_mutex_lock(mutex);
  84     }
  85
  86 quit:
  87
  88     pa_mutex_unlock(mutex);
  89
  90     pa_log("thread_func() for %s done...", (char*) pa_tls_get(tls));
  91 }
  92
  93 int main(int argc, char *argv[]) {
  94     int i, k;
  95     pa_thread* t[THREADS_MAX];
  96
  97     assert(pa_thread_is_running(pa_thread_self()));
  98
  99     mutex = pa_mutex_new(FALSE, FALSE);
 100     cond1 = pa_cond_new();
 101     cond2 = pa_cond_new();
 102     tls = pa_tls_new(pa_xfree);
 103
 104     for (i = 0; i < THREADS_MAX; i++) {
 105         t[i] = pa_thread_new(thread_func, pa_sprintf_malloc("Thread #%i", i+1));
 106         assert(t[i]);
 107     }
 108
 109     pa_mutex_lock(mutex);
 110
 111     pa_log("loop-init");
 112
 113     for (k = 0; k < 100; k++) {
 114         assert(magic_number == 0);
 115
 116
 117         magic_number = (int) rand() % 0x10000;
 118
 119         pa_log("iteration %i (%i)", k, magic_number);
 120
 121         pa_cond_signal(cond1, 0);
 122
 123         pa_cond_wait(cond2, mutex);
 124     }
 125
 126     pa_log("loop-exit");
 127
 128     magic_number = -1;
 129     pa_cond_signal(cond1, 1);
 130
 131     pa_mutex_unlock(mutex);
 132
 133     for (i = 0; i < THREADS_MAX; i++)
 134         pa_thread_free(t[i]);
 135
 136     pa_mutex_free(mutex);
 137     pa_cond_free(cond1);
 138     pa_cond_free(cond2);
 139     pa_tls_free(tls);
 140
 141     return 0;
 142 }