1// RUN: %clangxx_tsan %s -o %t
2// RUN: %run %t 2>&1 | FileCheck %s
3
4#include "bench.h"
5
6const int kMutex = 10;
7pthread_mutex_t mtx[kMutex];
8
9void thread(int tid) {
10  for (int i = 0; i < bench_niter; i++) {
11    int idx = (i % kMutex);
12    if (tid == 0)
13      idx = kMutex - idx - 1;
14    pthread_mutex_lock(&mtx[idx]);
15    pthread_mutex_unlock(&mtx[idx]);
16  }
17}
18
19void bench() {
20  for (int i = 0; i < kMutex; i++)
21    pthread_mutex_init(&mtx[i], 0);
22  start_thread_group(2, thread);
23}
24
25// CHECK: DONE
26
27