llvm-project

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// RUN: %clangxx_tsan %s -o %t
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// RUN: %run %t 2>&1 | FileCheck %s
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// bench.h needs pthread barriers which are not available on OS X
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// UNSUPPORTED: darwin
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#include "bench.h"
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pthread_mutex_t mtx;
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pthread_cond_t cv;
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int x;
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void thread(int tid) {
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  for (int i = 0; i < bench_niter; i++) {
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    pthread_mutex_lock(&mtx);
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    while (x != i * 2 + tid)
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      pthread_cond_wait(&cv, &mtx);
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    x++;
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    pthread_cond_signal(&cv);
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    pthread_mutex_unlock(&mtx);
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  }
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}
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void bench() {
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  pthread_mutex_init(&mtx, 0);
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  pthread_cond_init(&cv, 0);
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  start_thread_group(2, thread);
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}
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// CHECK: DONE
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