compiler-rt/test/tsan/bench_ten_mutexes.cpp

   1 // RUN: %clangxx_tsan %s -o %t
   2 // RUN: %run %t 2>&1 | FileCheck %s
   3
   4 // bench.h needs pthread barriers which are not available on OS X
   5 // UNSUPPORTED: darwin
   6
   7 #include "bench.h"
   8
   9 const int kMutex = 10;
  10 pthread_mutex_t mtx[kMutex];
  11
  12 void thread(int tid) {
  13   for (int i = 0; i < bench_niter; i++) {
  14     int idx = (i % kMutex);
  15     if (tid == 0)
  16       idx = kMutex - idx - 1;
  17     pthread_mutex_lock(&mtx[idx]);
  18     pthread_mutex_unlock(&mtx[idx]);
  19   }
  20 }
  21
  22 void bench() {
  23   for (int i = 0; i < kMutex; i++)
  24     pthread_mutex_init(&mtx[i], 0);
  25   start_thread_group(2, thread);
  26 }
  27
  28 // CHECK: DONE
  29