libcxx/test/std/thread/thread.semaphore/release.pass.cpp

   1 //===----------------------------------------------------------------------===//
   2 //
   3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   4 // See https://llvm.org/LICENSE.txt for license information.
   5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8 //
   9 // UNSUPPORTED: libcpp-has-no-threads
  10 // UNSUPPORTED: c++03, c++11
  11
  12 // This test requires the dylib support introduced in D68480,
  13 // which hasn't shipped yet.
  14 // XFAIL: with_system_cxx_lib=macosx
  15 // XFAIL: with_system_cxx_lib=macosx10.15
  16 // XFAIL: with_system_cxx_lib=macosx10.14
  17 // XFAIL: with_system_cxx_lib=macosx10.13
  18 // XFAIL: with_system_cxx_lib=macosx10.12
  19 // XFAIL: with_system_cxx_lib=macosx10.11
  20 // XFAIL: with_system_cxx_lib=macosx10.10
  21 // XFAIL: with_system_cxx_lib=macosx10.9
  22
  23 // <semaphore>
  24
  25 #include <semaphore>
  26 #include <thread>
  27
  28 #include "make_test_thread.h"
  29 #include "test_macros.h"
  30
  31 int main(int, char**)
  32 {
  33   std::counting_semaphore<> s(0);
  34
  35   s.release();
  36   s.acquire();
  37
  38   std::thread t = support::make_test_thread([&](){
  39     s.acquire();
  40   });
  41   s.release(2);
  42   t.join();
  43   s.acquire();
  44
  45   return 0;
  46 }