72 lines · 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-exception6//7//===----------------------------------------------------------------------===//8//9// UNSUPPORTED: no-threads10// UNSUPPORTED: c++0311 12// <future>13 14// class future<R>15 16// void wait() const;17 18#include <cassert>19#include <chrono>20#include <future>21#include <ratio>22 23#include "make_test_thread.h"24#include "test_macros.h"25 26void func1(std::promise<int> p)27{28 std::this_thread::sleep_for(std::chrono::milliseconds(500));29 p.set_value(3);30}31 32int j = 0;33 34void func3(std::promise<int&> p)35{36 std::this_thread::sleep_for(std::chrono::milliseconds(500));37 j = 5;38 p.set_value(j);39}40 41void func5(std::promise<void> p)42{43 std::this_thread::sleep_for(std::chrono::milliseconds(500));44 p.set_value();45}46 47template <typename T, typename F>48void test(F func) {49 typedef std::chrono::high_resolution_clock Clock;50 typedef std::chrono::duration<double, std::milli> ms;51 52 std::promise<T> p;53 std::future<T> f = p.get_future();54 support::make_test_thread(func, std::move(p)).detach();55 assert(f.valid());56 f.wait();57 assert(f.valid());58 Clock::time_point t0 = Clock::now();59 f.wait();60 Clock::time_point t1 = Clock::now();61 assert(f.valid());62 assert(t1-t0 < ms(5));63}64 65int main(int, char**)66{67 test<int>(func1);68 test<int&>(func3);69 test<void>(func5);70 return 0;71}72