libcxx/test/std/thread/thread.jthread/cons.move.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: libcpp-has-no-experimental-stop_token
  11 // UNSUPPORTED: c++03, c++11, c++14, c++17
  12 // XFAIL: availability-synchronization_library-missing
  13
  14 // jthread(jthread&& x) noexcept;
  15
  16 #include <cassert>
  17 #include <stop_token>
  18 #include <thread>
  19 #include <type_traits>
  20 #include <utility>
  21
  22 #include "make_test_thread.h"
  23 #include "test_macros.h"
  24
  25 static_assert(std::is_nothrow_move_constructible_v<std::jthread>);
  26
  27 int main(int, char**) {
  28   {
  29     // x.get_id() == id() and get_id() returns the value of x.get_id() prior
  30     // to the start of construction.
  31     std::jthread j1 = support::make_test_jthread([] {});
  32     auto id1        = j1.get_id();
  33
  34     std::jthread j2(std::move(j1));
  35     assert(j1.get_id() == std::jthread::id());
  36     assert(j2.get_id() == id1);
  37   }
  38
  39   {
  40     // ssource has the value of x.ssource prior to the start of construction
  41     // and x.ssource.stop_possible() is false.
  42     std::jthread j1 = support::make_test_jthread([] {});
  43     auto ss1        = j1.get_stop_source();
  44
  45     std::jthread j2(std::move(j1));
  46     assert(ss1 == j2.get_stop_source());
  47     assert(!j1.get_stop_source().stop_possible());
  48     assert(j2.get_stop_source().stop_possible());
  49   }
  50
  51   return 0;
  52 }