4684ddb6aa
- import libcxx - reduce targets to the one when compiled as a tools Change-Id: Iabb8427f80ff8e89463559a28bcb8b4f2bdbc496
95 lines
2.7 KiB
C++
95 lines
2.7 KiB
C++
//===----------------------------------------------------------------------===//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file is dual licensed under the MIT and the University of Illinois Open
|
|
// Source Licenses. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
// <future>
|
|
|
|
// class shared_future<R>
|
|
|
|
// template <class Clock, class Duration>
|
|
// future_status
|
|
// wait_until(const chrono::time_point<Clock, Duration>& abs_time) const;
|
|
|
|
#include <future>
|
|
#include <cassert>
|
|
|
|
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()
|
|
{
|
|
typedef std::chrono::high_resolution_clock Clock;
|
|
{
|
|
typedef int T;
|
|
std::promise<T> p;
|
|
std::shared_future<T> f = p.get_future();
|
|
std::thread(func1, std::move(p)).detach();
|
|
assert(f.valid());
|
|
assert(f.wait_until(Clock::now() + ms(300)) == std::future_status::timeout);
|
|
assert(f.valid());
|
|
assert(f.wait_until(Clock::now() + 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(5));
|
|
}
|
|
{
|
|
typedef int& T;
|
|
std::promise<T> p;
|
|
std::shared_future<T> f = p.get_future();
|
|
std::thread(func3, std::move(p)).detach();
|
|
assert(f.valid());
|
|
assert(f.wait_until(Clock::now() + ms(300)) == std::future_status::timeout);
|
|
assert(f.valid());
|
|
assert(f.wait_until(Clock::now() + 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(5));
|
|
}
|
|
{
|
|
typedef void T;
|
|
std::promise<T> p;
|
|
std::shared_future<T> f = p.get_future();
|
|
std::thread(func5, std::move(p)).detach();
|
|
assert(f.valid());
|
|
assert(f.wait_until(Clock::now() + ms(300)) == std::future_status::timeout);
|
|
assert(f.valid());
|
|
assert(f.wait_until(Clock::now() + 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(5));
|
|
}
|
|
}
|