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

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test/std/utilities/utility/mem.res/mem.res.monotonic.buffer/mem.res.monotonic.buffer.mem/allocate_from_underaligned_buffer.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()
				{
				globalMemCounter.reset();
				{
				alignas(4) char buffer[17];
				std::pmr::monotonic_buffer_resource mono1(buffer + 1, 16, std::pmr::new_delete_resource());
				std::pmr::memory_resource & r1 = mono1;

				void *ret = r1.allocate(1, 1);
				assert(ret == buffer + 1);
				mono1.release();

				ret = r1.allocate(1, 2);
				assert(ret == buffer + 2);
				mono1.release();

				ret = r1.allocate(1, 4);
				assert(ret == buffer + 4);
				mono1.release();

				// Test a size that is just big enough to fit in the buffer,
				// but can't fit if it's aligned.
				ret = r1.allocate(16, 1);
				assert(ret == buffer + 1);
				mono1.release();

				assert(globalMemCounter.checkNewCalledEq(0));
				ret = r1.allocate(16, 2);
				assert(globalMemCounter.checkNewCalledEq(1));
				assert(globalMemCounter.last_new_size >= 16);
				// assert(globalMemCounter.last_new_align >= 2);
				mono1.release();
				assert(globalMemCounter.checkDeleteCalledEq(1));
				// assert(globalMemCounter.last_new_align == globalMemCounter.last_delete_align);
				}
				}