refs #182: research st, add multiple threadds.

@@ -5,11 +5,16 @@
 
 
 #define srs_trace(msg, ...)   printf(msg, ##__VA_ARGS__);printf("\n")
 #define srs_trace(msg, ...)   printf(msg, ##__VA_ARGS__);printf("\n")
 
 
+st_mutex_t start = NULL;
 st_cond_t cond = NULL;
 st_cond_t cond = NULL;
 st_mutex_t mutex = NULL;
 st_mutex_t mutex = NULL;
 
 
-void* pfn(void* arg)
+void* master(void* arg)
 {
 {
+    // wait for main to start this thread.
+    st_mutex_lock(start);
+    st_mutex_unlock(start);
+    
     st_usleep(100 * 1000);
     st_usleep(100 * 1000);
     st_cond_signal(cond);
     st_cond_signal(cond);
     
     
@@ -24,6 +29,30 @@ void* pfn(void* arg)
     return NULL;
     return NULL;
 }
 }
 
 
+void* slave(void* arg)
+{
+    // lock mutex to control thread.
+    st_mutex_lock(mutex);
+    
+    // wait for main to start this thread.
+    st_mutex_lock(start);
+    st_mutex_unlock(start);
+    
+    // wait thread to ready.
+    st_cond_wait(cond);
+    srs_trace("1. st cond is ok");
+    
+    // release mutex to control thread
+    st_usleep(100 * 1000);
+    st_mutex_unlock(mutex);
+    
+    // wait thread to exit.
+    st_cond_wait(cond);
+    srs_trace("4. st is ok");
+    
+    return NULL;
+}
+
 int main(int argc, char** argv)
 int main(int argc, char** argv)
 {
 {
     if (st_set_eventsys(ST_EVENTSYS_ALT) < 0) {
     if (st_set_eventsys(ST_EVENTSYS_ALT) < 0) {
@@ -36,40 +65,41 @@ int main(int argc, char** argv)
         return -1;
         return -1;
     }
     }
 
 
+    if ((start = st_mutex_new()) == NULL) {
+        srs_trace("st_mutex_new start failed");
+        return -1;
+    }
+    st_mutex_lock(start);
+
     if ((cond = st_cond_new()) == NULL) {
     if ((cond = st_cond_new()) == NULL) {
-        srs_trace("st_cond_new failed");
+        srs_trace("st_cond_new cond failed");
         return -1;
         return -1;
     }
     }
     
     
     if ((mutex = st_mutex_new()) == NULL) {
     if ((mutex = st_mutex_new()) == NULL) {
-        srs_trace("st_mutex_new failed");
+        srs_trace("st_mutex_new mutex failed");
         return -1;
         return -1;
     }
     }
     
     
-    if (!st_thread_create(pfn, NULL, 0, 0)) {
+    if (!st_thread_create(master, NULL, 0, 0)) {
         srs_trace("st_thread_create failed");
         srs_trace("st_thread_create failed");
         return -1;
         return -1;
     }
     }
     
     
-    // lock mutex to control thread.
-    st_mutex_lock(mutex);
-    
-    // wait thread to ready.
-    st_cond_wait(cond);
-    srs_trace("1. st cond is ok");
-    
-    // release mutex to control thread
-    st_usleep(100 * 1000);
-    st_mutex_unlock(mutex);
+    if (!st_thread_create(slave, NULL, 0, 0)) {
+        srs_trace("st_thread_create failed");
+        return -1;
+    }
     
     
-    // wait thread to exit.
-    st_cond_wait(cond);
-    srs_trace("4. st is ok");
+    // run all threads.
+    st_mutex_unlock(start);
     
     
     // cleanup.
     // cleanup.
+    st_thread_exit(NULL);
+    
+    st_mutex_destroy(start);
     st_cond_destroy(cond);
     st_cond_destroy(cond);
     st_mutex_destroy(mutex);
     st_mutex_destroy(mutex);
-    st_thread_exit(NULL);
     
     
     return 0;
     return 0;
 }
 }