lucky-joe wrote on Thursday, April 05, 2007:

Hi @all,

I am using the Arm7-port with a lpc2290 uC from NXP.
I coded a message-passing framework with allocated buffers which adresses are passed with the message-queuing mechanism. But when i am calling the QueueSendFromISR during an interrupt, may be from an receive buffer indication of an uart-driver, i am not able do detect whether the buffer was sent or not because the QueueSendFromISR does not provide an error when the queue is full and the message was not sent during the ISR routine. But i dont’t free the buffer after that error my memory will get a leakage.

does anybody have an solution for that problem ?


nobody wrote on Saturday, April 07, 2007:

You could either define a function to check if the queue is full first (don’t use the standard function as this uses critical sections)

int iIsQueueFullFromISR( xQueueHandle xQueue )
   return ( pxQueue->uxMessagesWaiting == pxQueue->uxLength );

Or add another parameter to the queue send from isr function to return an error code.

lucky-joe wrote on Monday, April 09, 2007:

thanks for the proposal,

actually i use the uxQueueMessagesWaiting function to get the catually queued members and to compare it with the max number, but if you mean that i must not use this mechanism i will check your proposed way