Function ContentionProfilerStop

src/bthread/mutex.cpp:355–373

Stop contention profiler.

// Stop contention profiler.
void ContentionProfilerStop() {
    ContentionProfiler* ctx = NULL;
    if (g_cp) {
        std::unique_lock<pthread_mutex_t> mu(g_cp_mutex);
        if (g_cp) {
            ctx = g_cp;
            g_cp = NULL;
            mu.unlock();

            // make sure it's initialiazed in case no sample was gathered,
            // otherwise nothing will be written and succeeding pprof will fail.
            ctx->init_if_needed();
            // Deletion is safe because usages of g_cp are inside g_cp_mutex.
            delete ctx;
            return;
        }
    }
    LOG(ERROR) << "Contention profiler is not started!";
}

bool is_contention_site_valid(const bthread_contention_site_t& cs) {
    return bvar::is_sampling_range_valid(cs.sampling_range);