QXSemaphore Class Reference

Counting Semaphore of the QXK preemptive kernel. More...

Detailed Description

Counting Semaphore of the QXK preemptive kernel.

Details

QP::QXSemaphore is a blocking mechanism intended primarily for signaling extended threads. The semaphore is initialized with the maximum count (see QXSemaphore::init()), which allows you to create a binary semaphore (when the maximum count is 1) and counting semaphore when the maximum count is > 1.

Usage

The following example illustrates how to instantiate and use the semaphore in your application.

QP::QXSemaphore TH_sema; // <===
. . .
void XThread2::run(QP::QXThread * const thr) {
    TH_sema.init(0U,  // count==0 (signaling semaphore)
                1U); // max_count==1 (binary semaphore)
 
    for (;;) {
        // wait on a semaphore (BLOCK indefinitely)
        TH_sema.wait();
        . . .
   }
}

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The documentation for this class was generated from the following file:

• qxk.dox