libcxx/test/std/thread/thread.stoptoken/stoptoken/cons.copy.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: no-threads
  10 // UNSUPPORTED: c++03, c++11, c++14, c++17
  11 // XFAIL: availability-synchronization_library-missing
  12
  13 // stop_token(const stop_token&) noexcept;
  14
  15 #include <cassert>
  16 #include <stop_token>
  17 #include <type_traits>
  18
  19 #include "test_macros.h"
  20
  21 static_assert(std::is_nothrow_copy_constructible_v<std::stop_token>);
  22
  23 int main(int, char**) {
  24   {
  25     std::stop_source source;
  26     auto st = source.get_token();
  27     std::stop_token copy{st};
  28
  29     assert(st == copy);
  30
  31     assert(st.stop_possible());
  32     assert(!st.stop_requested());
  33
  34     assert(copy.stop_possible());
  35     assert(!copy.stop_requested());
  36
  37     source.request_stop();
  38     assert(st.stop_possible());
  39     assert(st.stop_requested());
  40
  41     assert(copy.stop_possible());
  42     assert(copy.stop_requested());
  43
  44   }
  45
  46   return 0;
  47 }