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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.
//
//===----------------------------------------------------------------------===//
//
// UNSUPPORTED: libcpp-has-no-threads
// <future>
// class promise<R>
// void swap(promise& other);
// template <class R> void swap(promise<R>& x, promise<R>& y);
#include <future>
#include <cassert>
#include "../test_allocator.h"
int main()
{
assert(test_alloc_base::count == 0);
{
std::promise<int> p0(std::allocator_arg, test_allocator<int>());
std::promise<int> p(std::allocator_arg, test_allocator<int>());
assert(test_alloc_base::count == 2);
p.swap(p0);
assert(test_alloc_base::count == 2);
std::future<int> f = p.get_future();
assert(test_alloc_base::count == 2);
assert(f.valid());
f = p0.get_future();
assert(f.valid());
assert(test_alloc_base::count == 2);
}
assert(test_alloc_base::count == 0);
{
std::promise<int> p0(std::allocator_arg, test_allocator<int>());
std::promise<int> p(std::allocator_arg, test_allocator<int>());
assert(test_alloc_base::count == 2);
swap(p, p0);
assert(test_alloc_base::count == 2);
std::future<int> f = p.get_future();
assert(test_alloc_base::count == 2);
assert(f.valid());
f = p0.get_future();
assert(f.valid());
assert(test_alloc_base::count == 2);
}
assert(test_alloc_base::count == 0);
{
std::promise<int> p0(std::allocator_arg, test_allocator<int>());
std::promise<int> p;
assert(test_alloc_base::count == 1);
p.swap(p0);
assert(test_alloc_base::count == 1);
std::future<int> f = p.get_future();
assert(test_alloc_base::count == 1);
assert(f.valid());
f = p0.get_future();
assert(f.valid());
assert(test_alloc_base::count == 1);
}
assert(test_alloc_base::count == 0);
{
std::promise<int> p0(std::allocator_arg, test_allocator<int>());
std::promise<int> p;
assert(test_alloc_base::count == 1);
swap(p, p0);
assert(test_alloc_base::count == 1);
std::future<int> f = p.get_future();
assert(test_alloc_base::count == 1);
assert(f.valid());
f = p0.get_future();
assert(f.valid());
assert(test_alloc_base::count == 1);
}
assert(test_alloc_base::count == 0);
}
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