feat(os): use recursive mutex by default (#6573)

src/osal/lv_freertos.c

@@ -364,7 +364,7 @@ static void prvRunThread(void * pxArg)
 
 static void prvMutexInit(lv_mutex_t * pxMutex)
 {
-    pxMutex->xMutex = xSemaphoreCreateMutex();
+    pxMutex->xMutex = xSemaphoreCreateRecursiveMutex();
 
     /* Ensure that the FreeRTOS mutex was successfully created. */
     if(pxMutex->xMutex == NULL) {

src/osal/lv_pthread.c

@@ -64,7 +64,13 @@ lv_result_t lv_thread_delete(lv_thread_t * thread)
 
 lv_result_t lv_mutex_init(lv_mutex_t * mutex)
 {
-    int ret = pthread_mutex_init(mutex, NULL);
+    pthread_mutexattr_t attr;
+
+    pthread_mutexattr_init(&attr);
+    pthread_mutexattr_settype(&attr, PTHREAD_MUTEX_RECURSIVE);
+    int ret = pthread_mutex_init(mutex, &attr);
+    pthread_mutexattr_destroy(&attr);
+
     if(ret) {
         LV_LOG_WARN("Error: %d", ret);
         return LV_RESULT_INVALID;