Differential D47360 Diff 219818 test/std/utilities/utility/mem.res/mem.res.global/new_delete_resource.pass.cpp

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test/std/utilities/utility/mem.res/mem.res.global/new_delete_resource.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>

				// memory_resource * new_delete_resource()

				#include <memory_resource>
				#include <type_traits>
				#include <cassert>

				#include "count_new.h"

				namespace ex = std::pmr;

				struct assert_on_compare : public ex::memory_resource
				{
				protected:
				virtual void * do_allocate(size_t, size_t)
				{ assert(false); }

				virtual void do_deallocate(void *, size_t, size_t)
				{ assert(false); }

				virtual bool do_is_equal(ex::memory_resource const &) const noexcept
				{ assert(false); }
				};

				void test_return()
				{
				{
				static_assert(std::is_same<
				decltype(ex::new_delete_resource()), ex::memory_resource*
				>::value, "");
				}
				// assert not null
				{
				assert(ex::new_delete_resource());
				}
				// assert same return value
				{
				assert(ex::new_delete_resource() == ex::new_delete_resource());
				}
				}

				void test_equality()
				{
				// Same object
				{
				ex::memory_resource & r1 = *ex::new_delete_resource();
				ex::memory_resource & r2 = *ex::new_delete_resource();
				// check both calls returned the same object
				assert(&r1 == &r2);
				// check for proper equality semantics
				assert(r1 == r2);
				assert(r2 == r1);
				assert(!(r1 != r2));
				assert(!(r2 != r1));
				}
				// Different types
				{
				ex::memory_resource & r1 = *ex::new_delete_resource();
				assert_on_compare c;
				ex::memory_resource & r2 = c;
				assert(r1 != r2);
				assert(!(r1 == r2));
				}
				}

				void test_allocate_deallocate()
				{
				ex::memory_resource & r1 = *ex::new_delete_resource();

				globalMemCounter.reset();

				void *ret = r1.allocate(50);
				assert(ret);
				assert(globalMemCounter.checkOutstandingNewEq(1));
				assert(globalMemCounter.checkLastNewSizeEq(50));

				r1.deallocate(ret, 1);
				assert(globalMemCounter.checkOutstandingNewEq(0));
				assert(globalMemCounter.checkDeleteCalledEq(1));

				}

				int main(int, char**)
				{
				static_assert(noexcept(ex::new_delete_resource()), "Must be noexcept");
				test_return();
				test_equality();
				test_allocate_deallocate();

				return 0;
				}