add a threading primitive API

git-svn-id: file:///home/lennart/svn/public/pulseaudio/trunk@1344 fefdeb5f-60dc-0310-8127-8f9354f1896f
2025-11-05 13:29:57 -05:00 · 2006-08-29 19:51:14 +00:00 · 2006-08-29 19:51:14 +00:00 · b2c341f935
commit b2c341f935
parent 5264d235d2
6 changed files with 498 additions and 3 deletions
--- a/src/tests/thread-test.c
+++ b/src/tests/thread-test.c
@ -0,0 +1,135 @@
+/* $Id$ */
+
+/***
+  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 <sched.h>
+
+#include <pulsecore/thread.h>
+#include <pulsecore/mutex.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 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_cond_signal(cond2, 0);
+        
+        pa_log("%s got number %i", (char*) pa_tls_get(tls), k);
+        
+        /* Spin! */
+        for (n = 0; n < k; n++)
+            sched_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];
+
+    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;
+}