Function semaphore_wait

examples/utest/testcases/mm/semaphore.h:24–30

}

void semaphore_wait(semaphore_t *sem)
{
    int count;
    do {
        count = atomic_load(&sem->count);
    } while (count == 0 || !atomic_compare_exchange_weak(&sem->count, &count, count - 1));
}

void semaphore_signal(semaphore_t *sem)
{