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//===----------------------------------------------------------------------===//
//
// 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++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;
static const ms sleepTime(500);
static const ms waitTime(5000);
void func1(std::promise<int> p)
{
std::this_thread::sleep_for(sleepTime);
p.set_value(3);
}
int j = 0;
void func3(std::promise<int&> p)
{
std::this_thread::sleep_for(sleepTime);
j = 5;
p.set_value(j);
}
void func5(std::promise<void> p)
{
std::this_thread::sleep_for(sleepTime);
p.set_value();
}
template <typename T, typename F>
void test(F func, bool waitFirst) {
typedef std::chrono::high_resolution_clock Clock;
std::promise<T> p;
std::future<T> f = p.get_future();
Clock::time_point t1, t0 = Clock::now();
std::thread(func, std::move(p)).detach();
assert(f.valid());
assert(f.wait_for(ms(1)) == std::future_status::timeout);
assert(f.valid());
if (waitFirst) {
f.wait();
assert(f.valid());
t1 = Clock::now();
assert(f.wait_for(ms(waitTime)) == std::future_status::ready);
assert(f.valid());
} else {
assert(f.wait_for(ms(waitTime)) == std::future_status::ready);
assert(f.valid());
t1 = Clock::now();
f.wait();
assert(f.valid());
}
assert(t1 - t0 >= sleepTime);
}
int main(int, char**)
{
test<int>(func1, true);
test<int&>(func3, true);
test<void>(func5, true);
test<int>(func1, false);
test<int&>(func3, false);
test<void>(func5, false);
return 0;
}
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