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88 lines
2.7 KiB
C++
88 lines
2.7 KiB
C++
//===----------------------------------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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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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// template <class Allocator>
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// promise(allocator_arg_t, const Allocator& a);
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#include <future>
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#include <cassert>
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#include "test_macros.h"
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#include "test_allocator.h"
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#include "min_allocator.h"
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int main(int, char**)
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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> p(std::allocator_arg, test_allocator<int>(42));
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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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}
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assert(test_alloc_base::alloc_count == 0);
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{
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std::promise<int&> p(std::allocator_arg, test_allocator<int>(42));
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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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}
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assert(test_alloc_base::alloc_count == 0);
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{
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std::promise<void> p(std::allocator_arg, test_allocator<void>(42));
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assert(test_alloc_base::alloc_count == 1);
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std::future<void> 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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}
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assert(test_alloc_base::alloc_count == 0);
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// Test with a minimal allocator
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{
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std::promise<int> p(std::allocator_arg, bare_allocator<void>());
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std::future<int> f = p.get_future();
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assert(f.valid());
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}
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{
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std::promise<int&> p(std::allocator_arg, bare_allocator<void>());
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std::future<int&> f = p.get_future();
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assert(f.valid());
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}
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{
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std::promise<void> p(std::allocator_arg, bare_allocator<void>());
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std::future<void> f = p.get_future();
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assert(f.valid());
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}
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// Test with a minimal allocator that returns class-type pointers
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{
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std::promise<int> p(std::allocator_arg, min_allocator<void>());
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std::future<int> f = p.get_future();
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assert(f.valid());
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}
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{
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std::promise<int&> p(std::allocator_arg, min_allocator<void>());
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std::future<int&> f = p.get_future();
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assert(f.valid());
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}
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{
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std::promise<void> p(std::allocator_arg, min_allocator<void>());
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std::future<void> f = p.get_future();
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assert(f.valid());
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}
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return 0;
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}
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