| //===----------------------------------------------------------------------===// |
| // |
| // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| // See https://llvm.org/LICENSE.txt for license information. |
| // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| // |
| //===----------------------------------------------------------------------===// |
| // |
| // UNSUPPORTED: libcpp-has-no-threads |
| // UNSUPPORTED: c++98, c++03 |
| |
| // <future> |
| |
| // class future<R> |
| |
| // template <class Rep, class Period> |
| // future_status |
| // wait_for(const chrono::duration<Rep, Period>& rel_time) const; |
| |
| #include <future> |
| #include <cassert> |
| |
| #include "test_macros.h" |
| |
| typedef std::chrono::milliseconds ms; |
| |
| void func1(std::promise<int> p) |
| { |
| std::this_thread::sleep_for(ms(500)); |
| p.set_value(3); |
| } |
| |
| int j = 0; |
| |
| void func3(std::promise<int&> p) |
| { |
| std::this_thread::sleep_for(ms(500)); |
| j = 5; |
| p.set_value(j); |
| } |
| |
| void func5(std::promise<void> p) |
| { |
| std::this_thread::sleep_for(ms(500)); |
| p.set_value(); |
| } |
| |
| int main(int, char**) |
| { |
| typedef std::chrono::high_resolution_clock Clock; |
| { |
| typedef int T; |
| std::promise<T> p; |
| std::future<T> f = p.get_future(); |
| std::thread(func1, std::move(p)).detach(); |
| assert(f.valid()); |
| assert(f.wait_for(ms(300)) == std::future_status::timeout); |
| assert(f.valid()); |
| assert(f.wait_for(ms(300)) == std::future_status::ready); |
| assert(f.valid()); |
| Clock::time_point t0 = Clock::now(); |
| f.wait(); |
| Clock::time_point t1 = Clock::now(); |
| assert(f.valid()); |
| assert(t1-t0 < ms(50)); |
| } |
| { |
| typedef int& T; |
| std::promise<T> p; |
| std::future<T> f = p.get_future(); |
| std::thread(func3, std::move(p)).detach(); |
| assert(f.valid()); |
| assert(f.wait_for(ms(300)) == std::future_status::timeout); |
| assert(f.valid()); |
| assert(f.wait_for(ms(300)) == std::future_status::ready); |
| assert(f.valid()); |
| Clock::time_point t0 = Clock::now(); |
| f.wait(); |
| Clock::time_point t1 = Clock::now(); |
| assert(f.valid()); |
| assert(t1-t0 < ms(50)); |
| } |
| { |
| typedef void T; |
| std::promise<T> p; |
| std::future<T> f = p.get_future(); |
| std::thread(func5, std::move(p)).detach(); |
| assert(f.valid()); |
| assert(f.wait_for(ms(300)) == std::future_status::timeout); |
| assert(f.valid()); |
| assert(f.wait_for(ms(300)) == std::future_status::ready); |
| assert(f.valid()); |
| Clock::time_point t0 = Clock::now(); |
| f.wait(); |
| Clock::time_point t1 = Clock::now(); |
| assert(f.valid()); |
| assert(t1-t0 < ms(50)); |
| } |
| |
| return 0; |
| } |