pthread_cond: refine prvInitializeStaticCond() (#42)

- On v11.1 SMP, pvPortMalloc() should not be called in critical secion.
  vTaskSuspenAll() would trigger assert if in criticalsection.
- The pthread_cond APIs are not ISR safe. Use vTaskSuspendAll() to prevent
  race condition is enough.

Signed-off-by: wangfei_chen <[email protected]>
Co-authored-by: wangfei_chen <[email protected]>

Author: Saiiijchan

FreeRTOS-Plus-POSIX/source/FreeRTOS_POSIX_pthread_cond.c

@@ -61,7 +61,7 @@ static bool prvInitializeStaticCond( pthread_cond_internal_t * pxCond )
     {
         /* Cond initialization must be in a critical section to prevent two threads
          * from initializing it at the same time. */
-        taskENTER_CRITICAL();
+        vTaskSuspendAll();
 
         /* Check again that the cond is still uninitialized, i.e. it wasn't
          * initialized while this function was waiting to enter the critical
@@ -82,7 +82,7 @@ static bool prvInitializeStaticCond( pthread_cond_internal_t * pxCond )
         }
 
         /* Exit the critical section. */
-        taskEXIT_CRITICAL();
+        xTaskResumeAll();
     }
 
     return pxCond->xIsInitialized;