Add vQueueDelete() to the MPU port.

Added volatile key word to the queue xRxLock and xTxLock members.
Ensure the portPRIVILEGED_BIT bit is set when the timer task is being created by the kernel - as it was for the idle task.  Necessary for MPU port.

Demo/CORTEX_M4_ATSAM4S_Atmel_Studio/src/ParTest.c

@@ -82,7 +82,7 @@
 /* The number of LEDs available to the user on the evaluation kit. */
 #define partestNUM_LEDS			( 3UL )
 
-/* Definitions not included in sam3s_ek.h. */
+/* Definitions not included in sam4s_ek.h. */
 #define LED2_GPIO 				( PIO_PC20_IDX )
 
 /* One of the LEDs is wired in the inverse to the others as it is also used as
@@ -121,20 +121,20 @@ void vParTestSetLED( unsigned portBASE_TYPE uxLED, signed portBASE_TYPE xValue )
 		if( xValue != pdFALSE )
 		{
 			/* Turn the LED on. */
-			portENTER_CRITICAL();
+			taskENTER_CRITICAL();
 			{
 				gpio_set_pin_low( ulLED[ uxLED ]);
 			}
-			portEXIT_CRITICAL();
+			taskEXIT_CRITICAL();
 		}
 		else
 		{
 			/* Turn the LED off. */
-			portENTER_CRITICAL();
+			taskENTER_CRITICAL();
 			{
 				gpio_set_pin_high( ulLED[ uxLED ]);
 			}
-			portEXIT_CRITICAL();
+			taskEXIT_CRITICAL();
 		}
 	}
 }
@@ -144,7 +144,11 @@ void vParTestToggleLED( unsigned portBASE_TYPE uxLED )
 {
 	if( uxLED < partestNUM_LEDS )
 	{
-		gpio_toggle_pin( ulLED[ uxLED ] );
+		taskENTER_CRITICAL();
+		{			
+			gpio_toggle_pin( ulLED[ uxLED ] );
+		}
+		taskEXIT_CRITICAL();		
 	}
 }
 							

Demo/CORTEX_M4_ATSAM4S_Atmel_Studio/src/serial.c

@@ -110,6 +110,7 @@ static xQueueHandle xCharsForTx;
 
 /*-----------------------------------------------------------*/
 
+
 /*
  * See the serial.h header file.
  */
@@ -239,6 +240,14 @@ void vSerialClose( xComPortHandle xPort )
 }
 /*-----------------------------------------------------------*/
 
+/* 
+ * It should be noted that the com test tasks (which use make use of this file) 
+ * are included to demonstrate queues being used to communicate between tasks 
+ * and interrupts, and to demonstrate a context switch being performed from 
+ * inside an interrupt service routine.  The serial driver used here is *not* 
+ * intended to represent an efficient implementation.  Real applications should 
+ * make use of the USARTS peripheral DMA channel (PDC).
+ */
 void USART1_Handler( void )
 {
 portBASE_TYPE xHigherPriorityTaskWoken = pdFALSE;

Source/portable/GCC/ARM_CM3_MPU/port.c

@@ -210,6 +210,7 @@ portBASE_TYPE MPU_xQueueGiveMutexRecursive( xQueueHandle xMutex );
 signed portBASE_TYPE MPU_xQueueAltGenericSend( xQueueHandle pxQueue, const void * const pvItemToQueue, portTickType xTicksToWait, portBASE_TYPE xCopyPosition );
 signed portBASE_TYPE MPU_xQueueAltGenericReceive( xQueueHandle pxQueue, void * const pvBuffer, portTickType xTicksToWait, portBASE_TYPE xJustPeeking );
 void MPU_vQueueAddToRegistry( xQueueHandle xQueue, signed char *pcName );
+void MPU_vQueueDelete( xQueueHandle xQueue );
 void *MPU_pvPortMalloc( size_t xSize );
 void MPU_vPortFree( void *pv );
 void MPU_vPortInitialiseBlocks( void );
@@ -1071,6 +1072,16 @@ signed portBASE_TYPE xReturn;
 #endif
 /*-----------------------------------------------------------*/
 
+void MPU_vQueueDelete( xQueueHandle xQueue )
+{
+portBASE_TYPE xRunningPrivileged = prvRaisePrivilege();
+
+	vQueueDelete( xQueue );
+	
+	portRESET_PRIVILEGE( xRunningPrivileged );
+}
+/*-----------------------------------------------------------*/
+
 void *MPU_pvPortMalloc( size_t xSize )
 {
 void *pvReturn;

Source/queue.c

@@ -85,7 +85,7 @@ task.h is included from an application file. */
  * PUBLIC LIST API documented in list.h
  *----------------------------------------------------------*/
 
-/* Constants used with the cRxLock and cTxLock structure members. */
+/* Constants used with the cRxLock and xTxLock structure members. */
 #define queueUNLOCKED					( ( signed portBASE_TYPE ) -1 )
 #define queueLOCKED_UNMODIFIED			( ( signed portBASE_TYPE ) 0 )
 
@@ -133,8 +133,8 @@ typedef struct QueueDefinition
 	unsigned portBASE_TYPE uxLength;		/*< The length of the queue defined as the number of items it will hold, not the number of bytes. */
 	unsigned portBASE_TYPE uxItemSize;		/*< The size of each items that the queue will hold. */
 
-	signed portBASE_TYPE xRxLock;			/*< Stores the number of items received from the queue (removed from the queue) while the queue was locked.  Set to queueUNLOCKED when the queue is not locked. */
+	volatile signed portBASE_TYPE xRxLock;	/*< Stores the number of items received from the queue (removed from the queue) while the queue was locked.  Set to queueUNLOCKED when the queue is not locked. */
-	signed portBASE_TYPE xTxLock;			/*< Stores the number of items transmitted to the queue (added to the queue) while the queue was locked.  Set to queueUNLOCKED when the queue is not locked. */
+	volatile signed portBASE_TYPE xTxLock;	/*< Stores the number of items transmitted to the queue (added to the queue) while the queue was locked.  Set to queueUNLOCKED when the queue is not locked. */
 	
 	#if ( configUSE_TRACE_FACILITY == 1 )
 		unsigned char ucQueueNumber;

Source/timers.c

@@ -200,12 +200,12 @@ portBASE_TYPE xReturn = pdFAIL;
 		{
 			/* Create the timer task, storing its handle in xTimerTaskHandle so
 			it can be returned by the xTimerGetTimerDaemonTaskHandle() function. */
-			xReturn = xTaskCreate( prvTimerTask, ( const signed char * ) "Tmr Svc", ( unsigned short ) configTIMER_TASK_STACK_DEPTH, NULL, ( unsigned portBASE_TYPE ) configTIMER_TASK_PRIORITY, &xTimerTaskHandle );	
+			xReturn = xTaskCreate( prvTimerTask, ( const signed char * ) "Tmr Svc", ( unsigned short ) configTIMER_TASK_STACK_DEPTH, NULL, ( ( unsigned portBASE_TYPE ) configTIMER_TASK_PRIORITY ) | portPRIVILEGE_BIT, &xTimerTaskHandle );	
 		}
 		#else
 		{
 			/* Create the timer task without storing its handle. */
-			xReturn = xTaskCreate( prvTimerTask, ( const signed char * ) "Tmr Svc", ( unsigned short ) configTIMER_TASK_STACK_DEPTH, NULL, ( unsigned portBASE_TYPE ) configTIMER_TASK_PRIORITY, NULL);
+			xReturn = xTaskCreate( prvTimerTask, ( const signed char * ) "Tmr Svc", ( unsigned short ) configTIMER_TASK_STACK_DEPTH, NULL, ( ( unsigned portBASE_TYPE ) configTIMER_TASK_PRIORITY ) | portPRIVILEGE_BIT, NULL);
 		}
 		#endif
 	}
@@ -442,7 +442,7 @@ portTickType xNextExpireTime;
 static portTickType prvSampleTimeNow( portBASE_TYPE *pxTimerListsWereSwitched )
 {
 portTickType xTimeNow;
-static portTickType xLastTime = ( portTickType ) 0U;
+PRIVILEGED_DATA static portTickType xLastTime = ( portTickType ) 0U;
 
 	xTimeNow = xTaskGetTickCount();