compiler-rt/test/tsan/bench_mutex.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 pthread_mutex_t mtx;
  10 pthread_cond_t cv;
  11 int x;
  12
  13 void thread(int tid) {
  14   for (int i = 0; i < bench_niter; i++) {
  15     pthread_mutex_lock(&mtx);
  16     while (x != i * 2 + tid)
  17       pthread_cond_wait(&cv, &mtx);
  18     x++;
  19     pthread_cond_signal(&cv);
  20     pthread_mutex_unlock(&mtx);
  21   }
  22 }
  23
  24 void bench() {
  25   pthread_mutex_init(&mtx, 0);
  26   pthread_cond_init(&cv, 0);
  27   start_thread_group(2, thread);
  28 }
  29
  30 // CHECK: DONE
  31