compiler-rt/test/tsan/bench_single_writer.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 int x;
  10
  11 void thread(int tid) {
  12   if (tid == 0) {
  13     for (int i = 0; i < bench_niter; i++)
  14       __atomic_store_n(&x, 0, __ATOMIC_RELEASE);
  15   } else {
  16     for (int i = 0; i < bench_niter; i++)
  17       __atomic_load_n(&x, __ATOMIC_ACQUIRE);
  18   }
  19 }
  20
  21 void bench() {
  22   start_thread_group(bench_nthread, thread);
  23 }
  24
  25 // CHECK: DONE
  26