Function sem_waiter

test/bthread_semaphore_unittest.cpp:25–32

const size_t SEM_COUNT = 10000;

void* sem_waiter(void* arg) {
    bthread_usleep(10 * 1000);
    auto sem = (bthread_sem_t*)arg;
    for (size_t i = 0; i < SEM_COUNT; ++i) {
        bthread_sem_wait(sem);
    }
    return NULL;
}

void* sem_poster(void* arg) {
    bthread_usleep(10 * 1000);