Method init_if_needed

src/bthread/mutex.cpp:160–169

}

void ContentionProfiler::init_if_needed() {
    if (!_init) {
        // Already output nanoseconds, always set cycles/second to 1000000000.
        _disk_buf.append("--- contention\ncycles/second=1000000000\n");
        if (_dedup_map.init(1024, 60) != 0) {
            LOG(WARNING) << "Fail to initialize dedup_map";
        }
        _init = true;
    }
}
    
void ContentionProfiler::dump_and_destroy(SampledContention* c) {
    init_if_needed();