libcxx/test/std/thread/thread.semaphore/timed.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 #include <chrono>
  28 #include <cassert>
  29
  30 #include "make_test_thread.h"
  31 #include "test_macros.h"
  32
  33 int main(int, char**)
  34 {
  35   auto const start = std::chrono::steady_clock::now();
  36
  37   std::counting_semaphore<> s(0);
  38
  39   assert(!s.try_acquire_until(start + std::chrono::milliseconds(250)));
  40   assert(!s.try_acquire_for(std::chrono::milliseconds(250)));
  41
  42   std::thread t = support::make_test_thread([&](){
  43     std::this_thread::sleep_for(std::chrono::milliseconds(250));
  44     s.release();
  45     std::this_thread::sleep_for(std::chrono::milliseconds(250));
  46     s.release();
  47   });
  48
  49   assert(s.try_acquire_until(start + std::chrono::seconds(2)));
  50   assert(s.try_acquire_for(std::chrono::seconds(2)));
  51   t.join();
  52
  53   auto const end = std::chrono::steady_clock::now();
  54   assert(end - start < std::chrono::seconds(10));
  55
  56   return 0;
  57 }