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OSA : OS_Queue_Check

bool OS_Queue_Check (queue)
bool OS_Queue_Check_I (queue)

Check if there is any message in queue.

OS_ENABLE_QUEUE constant must be defined in OSAcfg.h.

For PIC16, message queues can be allocated only in bank0 or bank1

Call allowed:



queue Queue of messages descriptor. Variable of OST_QUEUE type.


false queue is empty
true there are some messages in queue


OST_QUEUE queue;
void Task (void)
    OST_MSG msg;
    for (;;) {
        if (OS_Queue_Check(queue)) {     // If any message present
            OS_AcceptQueue(queue, msg);  // then accept it

Old style name


See also

en/osa/ref/allservices/os_queue_check.txt · Last modified: 07.10.2010 13:57 (external edit)
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