Function locker

test/bthread_mutex_unittest.cpp:37–45

long start_time = butil::cpuwide_time_ms();
int c = 0;
void* locker(void* arg) {
    bthread_mutex_t* m = (bthread_mutex_t*)arg;
    bthread_mutex_lock(m);
    printf("[%" PRIu64 "] I'm here, %d, %" PRId64 "ms\n", 
           pthread_numeric_id(), ++c, butil::cpuwide_time_ms() - start_time);
    bthread_usleep(10000);
    bthread_mutex_unlock(m);
    return NULL;
}

TEST(MutexTest, sanity) {
    bthread_mutex_t m;