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 
thread(int tid)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 
bench()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 
32