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//===----------------------------------------------------------------------===//
//
// 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>
// const R& shared_future::get();
// R& shared_future<R&>::get();
// void shared_future<void>::get();
#include <future>
#include <cassert>
void func1(std::promise<int> p)
{
std::this_thread::sleep_for(std::chrono::milliseconds(500));
p.set_value(3);
}
void func2(std::promise<int> p)
{
std::this_thread::sleep_for(std::chrono::milliseconds(500));
p.set_exception(std::make_exception_ptr(3));
}
int j = 0;
void func3(std::promise<int&> p)
{
std::this_thread::sleep_for(std::chrono::milliseconds(500));
j = 5;
p.set_value(j);
}
void func4(std::promise<int&> p)
{
std::this_thread::sleep_for(std::chrono::milliseconds(500));
p.set_exception(std::make_exception_ptr(3.5));
}
void func5(std::promise<void> p)
{
std::this_thread::sleep_for(std::chrono::milliseconds(500));
p.set_value();
}
void func6(std::promise<void> p)
{
std::this_thread::sleep_for(std::chrono::milliseconds(500));
p.set_exception(std::make_exception_ptr('c'));
}
int main()
{
{
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.get() == 3);
assert(f.valid());
}
{
std::promise<T> p;
std::shared_future<T> f = p.get_future();
std::thread(func2, std::move(p)).detach();
try
{
assert(f.valid());
assert(f.get() == 3);
assert(false);
}
catch (int i)
{
assert(i == 3);
}
assert(f.valid());
}
}
{
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.get() == 5);
assert(f.valid());
}
{
std::promise<T> p;
std::shared_future<T> f = p.get_future();
std::thread(func4, std::move(p)).detach();
try
{
assert(f.valid());
assert(f.get() == 3);
assert(false);
}
catch (double i)
{
assert(i == 3.5);
}
assert(f.valid());
}
}
{
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());
f.get();
assert(f.valid());
}
{
std::promise<T> p;
std::shared_future<T> f = p.get_future();
std::thread(func6, std::move(p)).detach();
try
{
assert(f.valid());
f.get();
assert(false);
}
catch (char i)
{
assert(i == 'c');
}
assert(f.valid());
}
}
}
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