| // Copyright (C) 2019-2023 Free Software Foundation, Inc. |
| // |
| // This file is part of the GNU ISO C++ Library. This library is free |
| // software; you can redistribute it and/or modify it under the |
| // terms of the GNU General Public License as published by the |
| // Free Software Foundation; either version 3, or (at your option) |
| // any later version. |
| |
| // This library is distributed in the hope that it will be useful, |
| // but WITHOUT ANY WARRANTY; without even the implied warranty of |
| // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| // GNU General Public License for more details. |
| |
| // You should have received a copy of the GNU General Public License along |
| // with this library; see the file COPYING3. If not see |
| // <http://www.gnu.org/licenses/>. |
| |
| // { dg-options "-std=gnu++2a" } |
| // { dg-add-options libatomic } |
| // { dg-do run { target c++2a } } |
| |
| #include <stop_token> |
| #include <functional> |
| #include <testsuite_hooks.h> |
| |
| void |
| test01() |
| { |
| bool called = false; |
| std::function<void()> f = [&called]{ called = true; }; |
| std::stop_source ssrc; |
| ssrc.request_stop(); |
| std::stop_token tok = ssrc.get_token(); |
| std::stop_callback cb1(tok, f); |
| VERIFY( tok.stop_possible() ); |
| VERIFY( f != nullptr ); |
| VERIFY( called == true ); |
| |
| called = false; |
| std::stop_callback cb2(std::move(tok), f); |
| // when callback is executed immediately, no change in ownership: |
| VERIFY( tok.stop_possible() ); |
| VERIFY( f != nullptr ); |
| VERIFY( called == true ); |
| |
| std::stop_token sink(std::move(tok)); // leave tok empty |
| |
| called = false; |
| std::stop_callback cb3(tok, f); |
| VERIFY( f != nullptr ); |
| VERIFY( called == false ); |
| |
| called = false; |
| std::stop_callback cb4(std::move(tok), f); |
| VERIFY( f != nullptr ); |
| VERIFY( called == false ); |
| } |
| |
| void |
| test02() |
| { |
| bool called = false; |
| std::function<void()> f0 = [&called]{ called = true; }; |
| std::function<void()> f = f0; |
| std::stop_source ssrc; |
| ssrc.request_stop(); |
| std::stop_token tok = ssrc.get_token(); |
| |
| std::stop_callback cb1(tok, std::move(f)); |
| VERIFY( tok.stop_possible() ); |
| VERIFY( f == nullptr ); |
| VERIFY( called == true ); |
| |
| called = false; |
| f = f0; |
| std::stop_callback cb2(std::move(tok), std::move(f)); |
| // when callback is executed immediately, no change in ownership: |
| VERIFY( tok.stop_possible() ); |
| VERIFY( f == nullptr ); |
| VERIFY( called == true ); |
| |
| std::stop_token sink(std::move(tok)); // leave tok empty |
| |
| called = false; |
| f = f0; |
| std::stop_callback cb3(tok, std::move(f)); |
| VERIFY( f == nullptr ); |
| VERIFY( called == false ); |
| |
| called = false; |
| f = f0; |
| std::stop_callback cb4(std::move(tok), std::move(f)); |
| VERIFY( f == nullptr ); |
| VERIFY( called == false ); |
| } |
| |
| void |
| test03() |
| { |
| bool called[4] = { }; |
| std::stop_source ssrc; |
| std::stop_token tok = ssrc.get_token(); |
| std::stop_callback cb1(tok, [&]{ called[0] = true; }); |
| VERIFY( tok.stop_possible() ); |
| VERIFY( called[0] == false ); |
| |
| std::stop_callback cb2(std::move(tok), [&]{ called[1] = true; }); |
| VERIFY( !tok.stop_possible() ); |
| VERIFY( called[1] == false ); |
| |
| std::stop_callback cb3(tok, [&]{ called[2] = true; }); |
| VERIFY( called[2] == false ); |
| |
| std::stop_callback cb4(std::move(tok), [&]{ called[3] = true; }); |
| VERIFY( called[3] == false ); |
| |
| ssrc.request_stop(); |
| VERIFY( called[0] == true ); |
| VERIFY( called[1] == true ); |
| VERIFY( called[2] == false ); |
| VERIFY( called[3] == false ); |
| } |
| |
| int main() |
| { |
| test01(); |
| test02(); |
| test03(); |
| } |