code.delx.au - pulseaudio/blob - 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 <sched.h>
  27
  28 #include <pulsecore/thread.h>
  29 #include <pulsecore/mutex.h>
  30 #include <pulsecore/log.h>
  31 #include <pulsecore/core-util.h>
  32 #include <pulse/xmalloc.h>
  33
  34 static pa_mutex *mutex = NULL;
  35 static pa_cond *cond1 = NULL, *cond2 = NULL;
  36 static pa_tls *tls = NULL;
  37
  38 static int magic_number = 0;
  39
  40 #define THREADS_MAX 20
  41
  42 static void thread_func(void *data) {
  43     pa_tls_set(tls, data);
  44
  45     pa_log("thread_func() for %s starting...", (char*) pa_tls_get(tls));
  46
  47     pa_mutex_lock(mutex);
  48
  49     for (;;) {
  50         int k, n;
  51
  52         pa_log("%s waiting ...", (char*) pa_tls_get(tls));
  53
  54         for (;;) {
  55
  56             if (magic_number < 0)
  57                 goto quit;
  58
  59             if (magic_number != 0)
  60                 break;
  61
  62             pa_cond_wait(cond1, mutex);
  63         }
  64
  65         k = magic_number;
  66         magic_number = 0;
  67
  68         pa_mutex_unlock(mutex);
  69
  70         pa_cond_signal(cond2, 0);
  71
  72         pa_log("%s got number %i", (char*) pa_tls_get(tls), k);
  73
  74         /* Spin! */
  75         for (n = 0; n < k; n++)
  76             sched_yield();
  77
  78         pa_mutex_lock(mutex);
  79     }
  80
  81 quit:
  82
  83     pa_mutex_unlock(mutex);
  84
  85     pa_log("thread_func() for %s done...", (char*) pa_tls_get(tls));
  86 }
  87
  88 int main(int argc, char *argv[]) {
  89     int i, k;
  90     pa_thread* t[THREADS_MAX];
  91
  92     mutex = pa_mutex_new(0);
  93     cond1 = pa_cond_new();
  94     cond2 = pa_cond_new();
  95     tls = pa_tls_new(pa_xfree);
  96
  97     for (i = 0; i < THREADS_MAX; i++) {
  98         t[i] = pa_thread_new(thread_func, pa_sprintf_malloc("Thread #%i", i+1));
  99         assert(t[i]);
 100     }
 101
 102     pa_mutex_lock(mutex);
 103
 104     pa_log("loop-init");
 105
 106     for (k = 0; k < 100; k++) {
 107         assert(magic_number == 0);
 108
 109
 110         magic_number = (int) rand() % 0x10000;
 111
 112         pa_log("iteration %i (%i)", k, magic_number);
 113
 114         pa_cond_signal(cond1, 0);
 115
 116         pa_cond_wait(cond2, mutex);
 117     }
 118
 119     pa_log("loop-exit");
 120
 121     magic_number = -1;
 122     pa_cond_signal(cond1, 1);
 123
 124     pa_mutex_unlock(mutex);
 125
 126     for (i = 0; i < THREADS_MAX; i++)
 127         pa_thread_free(t[i]);
 128
 129     pa_mutex_free(mutex);
 130     pa_cond_free(cond1);
 131     pa_cond_free(cond2);
 132     pa_tls_free(tls);
 133
 134     return 0;
 135 }