switch: update for latest libnx

src/thread/switch/SDL_syscond.c

@@ -33,10 +33,14 @@
 
 struct SDL_cond
 {
-    Mutex mutex;
     CondVar var;
 };
 
+struct SDL_mutex
+{
+    RMutex mtx;
+};
+
 /* Create a condition variable */
 SDL_cond *
 SDL_CreateCond(void)
@@ -45,8 +49,7 @@ SDL_CreateCond(void)
 
     cond = (SDL_cond *) SDL_malloc(sizeof(SDL_cond));
     if (cond) {
-        mutexInit(&cond->mutex);
-        condvarInit(&cond->var, &cond->mutex);
+        condvarInit(&cond->var);
     }
     else {
         SDL_OutOfMemory();
@@ -113,17 +116,22 @@ Thread B:
 int
 SDL_CondWaitTimeout(SDL_cond *cond, SDL_mutex *mutex, Uint32 ms)
 {
+    uint32_t mutex_state[2];
+
     if (!cond) {
         return SDL_SetError("Passed a NULL condition variable");
     }
 
-    /* Unlock the mutex, as is required by condition variable semantics */
-    SDL_UnlockMutex(mutex);
+	// backup mutex state
+    mutex_state[0] = mutex->mtx.thread_tag;
+    mutex_state[1] = mutex->mtx.counter;
+    mutex->mtx.thread_tag = 0;
+    mutex->mtx.counter = 0;
 
-    condvarWaitTimeout(&cond->var, ms * 1000000);
+    condvarWaitTimeout(&cond->var, &mutex->mtx.lock, ms * 1000000);
 
-    /* Lock the mutex, as is required by condition variable semantics */
-    SDL_LockMutex(mutex);
+    mutex->mtx.thread_tag = mutex_state[0];
+    mutex->mtx.counter = mutex_state[1];
 
     return 0;
 }