1 //===----------------------------------------------------------------------===// 2 // 3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4 // See https://llvm.org/LICENSE.txt for license information. 5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6 // 7 //===----------------------------------------------------------------------===// 8 9 // UNSUPPORTED: c++03, c++11, c++14 10 // TODO: Change to XFAIL once https://github.com/llvm/llvm-project/issues/40340 is fixed 11 // UNSUPPORTED: availability-pmr-missing 12 13 // <memory_resource> 14 15 // class monotonic_buffer_resource 16 17 #include <memory_resource> 18 #include <cassert> 19 20 #include "count_new.h" 21 #include "test_macros.h" 22 main(int,char **)23int main(int, char**) { 24 globalMemCounter.reset(); 25 char buffer[100]; 26 auto mono1 = std::pmr::monotonic_buffer_resource(buffer, sizeof buffer, std::pmr::new_delete_resource()); 27 std::pmr::memory_resource& r1 = mono1; 28 29 // Check that construction with a buffer does not allocate anything from the upstream 30 assert(globalMemCounter.checkNewCalledEq(0)); 31 32 // Check that an allocation that fits in the buffer does not allocate anything from the upstream 33 void* ret = r1.allocate(50); 34 assert(ret); 35 assert(globalMemCounter.checkNewCalledEq(0)); 36 37 // Check a second allocation 38 ret = r1.allocate(20); 39 assert(ret); 40 assert(globalMemCounter.checkNewCalledEq(0)); 41 42 r1.deallocate(ret, 50); 43 assert(globalMemCounter.checkDeleteCalledEq(0)); 44 45 // Check an allocation that doesn't fit in the original buffer 46 ret = r1.allocate(50); 47 assert(ret); 48 ASSERT_WITH_LIBRARY_INTERNAL_ALLOCATIONS(globalMemCounter.checkNewCalledEq(1)); 49 50 r1.deallocate(ret, 50); 51 assert(globalMemCounter.checkDeleteCalledEq(0)); 52 53 mono1.release(); 54 ASSERT_WITH_LIBRARY_INTERNAL_ALLOCATIONS(globalMemCounter.checkDeleteCalledEq(1)); 55 assert(globalMemCounter.checkOutstandingNewEq(0)); 56 57 return 0; 58 } 59