FreeRTOS UseInputVal

xSemaphoreHandle xMutexUseInputVal;

...

	xMutexUseInputVal = xSemaphoreCreateMutex();
	if (xMutexUseInputVal == NULL) {
		printf("Error creating xMutexUseInputVal function: %s, line %d\n",
				__FUNCTION__, __LINE__);
	}


int GetUseInputVal(void) {
	int localUseInputVal;

	if (xMutexUseInputVal != NULL) {
		/* See if we can obtain the semaphore.
		 * If the semaphore is not available wait 10 ticks to see
		 * if it becomes free.
		 */
		if (xSemaphoreTake( xMutexUseInputVal, ( portTickType ) 10 ) == pdTRUE) {
			/* We were able to obtain the semaphore and can now
			 * access the shared resource.
			 */
			localUseInputVal = UseInputVal;

			/* We have finished accessing the shared resource.
			 * Release the mutex.
			 */
			xSemaphoreGive( xMutexUseInputVal );
			return (localUseInputVal);
		} else {
			/* We could not obtain the semaphore and can therefore
			 * not access the shared resource safely.
			 */
			printf("Error with xMutexUseInputVal function: %s, line %d\n",
					__FUNCTION__, __LINE__);
			/* we skip further error handling */
		}
	}
} /* GetUseInputVal */

void SetUseInputVal(int val) {
	if (xMutexUseInputVal != NULL) {
		/* See if we can obtain the semaphore.
		 * If the semaphore is not available wait 10 ticks to see
		 * if it becomes free.
		 */
		if (xSemaphoreTake( xMutexUseInputVal, ( portTickType ) 10 ) == pdTRUE) {
			/* We were able to obtain the semaphore and can now
			 * access the shared resource.
			 */
			UseInputVal = val;

			/* We have finished accessing the shared resource.
			 * Release the mutex.
			 */
			xSemaphoreGive( xMutexUseInputVal );
		} else {
			/* We could not obtain the semaphore and can therefore
			 * not access the shared resource safely.
			 */
			printf("Error with xMutexUseInputVal function: %s, line %d\n",
					__FUNCTION__, __LINE__);
			/* we skip further error handling */
		}
	}
} /* SetUseInputVal */