Function do_timedwait

test/bthread_semaphore_unittest.cpp:84–88

}

void* do_timedwait(void *arg) {
    struct timespec t = { -2, 0 };
    EXPECT_EQ(ETIMEDOUT, bthread_sem_timedwait((bthread_sem_t*)arg, &t));
    return NULL;
}

TEST(SemaphoreTest, timedwait) {
    bthread_sem_t sem;