Differential D47360 Diff 219818 test/std/utilities/utility/mem.res/mem.res.monotonic.buffer/mem.res.monotonic.buffer.mem/allocate_overaligned_request.pass.cpp

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test/std/utilities/utility/mem.res/mem.res.monotonic.buffer/mem.res.monotonic.buffer.mem/allocate_overaligned_request.pass.cpp

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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: c++98, c++03

				// <memory_resource>

				// class monotonic_buffer_resource

				#include <memory_resource>
				#include <cassert>

				#include "count_new.h"

				int main()
				{
				#ifndef TEST_HAS_NO_ALIGNED_ALLOCATION

				globalMemCounter.reset();
				std::pmr::monotonic_buffer_resource mono1(1024, std::pmr::new_delete_resource());
				std::pmr::memory_resource & r1 = mono1;

				constexpr size_t big_alignment = 8 * alignof(std::max_align_t);
				static_assert(big_alignment > 4);

				void *ret = r1.allocate(2048, big_alignment);
				assert(ret != nullptr);
				assert(globalMemCounter.checkNewCalledEq(1));
				assert(globalMemCounter.last_new_size >= 2048);
				assert(globalMemCounter.last_new_align >= big_alignment);

				// Check that a single highly aligned allocation request doesn't
				// permanently "poison" the resource to allocate only super-aligned
				// blocks of memory.
				ret = r1.allocate(globalMemCounter.last_new_size, 4);
				assert(ret != nullptr);
				assert(globalMemCounter.checkNewCalledEq(2));
				assert(globalMemCounter.last_new_align >= 4);
				assert(globalMemCounter.last_new_align < big_alignment);

				#endif
				}