86 lines
2.8 KiB
C++
86 lines
2.8 KiB
C++
//===----------------------------------------------------------------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is dual licensed under the MIT and the University of Illinois Open
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// Source Licenses. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// UNSUPPORTED: libcpp-has-no-threads
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// UNSUPPORTED: c++98, c++03
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// <future>
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// class promise<R>
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// void swap(promise& other);
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// template <class R> void swap(promise<R>& x, promise<R>& y);
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#include <future>
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#include <cassert>
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#include "test_allocator.h"
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int main()
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{
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assert(test_alloc_base::alloc_count == 0);
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{
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std::promise<int> p0(std::allocator_arg, test_allocator<int>());
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std::promise<int> p(std::allocator_arg, test_allocator<int>());
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assert(test_alloc_base::alloc_count == 2);
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p.swap(p0);
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assert(test_alloc_base::alloc_count == 2);
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std::future<int> f = p.get_future();
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assert(test_alloc_base::alloc_count == 2);
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assert(f.valid());
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f = p0.get_future();
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assert(f.valid());
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assert(test_alloc_base::alloc_count == 2);
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}
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assert(test_alloc_base::alloc_count == 0);
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{
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std::promise<int> p0(std::allocator_arg, test_allocator<int>());
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std::promise<int> p(std::allocator_arg, test_allocator<int>());
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assert(test_alloc_base::alloc_count == 2);
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swap(p, p0);
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assert(test_alloc_base::alloc_count == 2);
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std::future<int> f = p.get_future();
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assert(test_alloc_base::alloc_count == 2);
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assert(f.valid());
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f = p0.get_future();
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assert(f.valid());
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assert(test_alloc_base::alloc_count == 2);
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}
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assert(test_alloc_base::alloc_count == 0);
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{
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std::promise<int> p0(std::allocator_arg, test_allocator<int>());
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std::promise<int> p;
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assert(test_alloc_base::alloc_count == 1);
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p.swap(p0);
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assert(test_alloc_base::alloc_count == 1);
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std::future<int> f = p.get_future();
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assert(test_alloc_base::alloc_count == 1);
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assert(f.valid());
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f = p0.get_future();
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assert(f.valid());
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assert(test_alloc_base::alloc_count == 1);
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}
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assert(test_alloc_base::alloc_count == 0);
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{
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std::promise<int> p0(std::allocator_arg, test_allocator<int>());
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std::promise<int> p;
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assert(test_alloc_base::alloc_count == 1);
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swap(p, p0);
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assert(test_alloc_base::alloc_count == 1);
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std::future<int> f = p.get_future();
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assert(test_alloc_base::alloc_count == 1);
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assert(f.valid());
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f = p0.get_future();
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assert(f.valid());
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assert(test_alloc_base::alloc_count == 1);
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}
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assert(test_alloc_base::alloc_count == 0);
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}
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