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
23void test_geometric_progression() {
24 // mem.res.monotonic.buffer 1.3
25 // Each additional buffer is larger than the previous one, following a
26 // geometric progression.
27
28 globalMemCounter.reset();
29 std::pmr::monotonic_buffer_resource mono1(100, std::pmr::new_delete_resource());
30 std::pmr::memory_resource& r1 = mono1;
31
32 assert(globalMemCounter.checkNewCalledEq(0));
33 std::size_t next_buffer_size = 100;
34 void* ret = r1.allocate(bytes: 10, alignment: 1);
35 assert(ret != nullptr);
36 assert(globalMemCounter.checkNewCalledEq(1));
37 assert(globalMemCounter.last_new_size >= next_buffer_size);
38 next_buffer_size = globalMemCounter.last_new_size + 1;
39
40 int new_called = 1;
41 while (new_called < 5) {
42 ret = r1.allocate(bytes: 10, alignment: 1);
43 if (globalMemCounter.new_called > new_called) {
44 assert(globalMemCounter.new_called == new_called + 1);
45 assert(globalMemCounter.last_new_size >= next_buffer_size);
46 next_buffer_size = globalMemCounter.last_new_size + 1;
47 new_called += 1;
48 }
49 }
50}
51
52int main(int, char**) {
53#if TEST_SUPPORTS_LIBRARY_INTERNAL_ALLOCATIONS && !defined(DISABLE_NEW_COUNT)
54 test_geometric_progression();
55#endif
56
57 return 0;
58}
59

source code of libcxx/test/std/utilities/utility/mem.res/mem.res.monotonic.buffer/mem.res.monotonic.buffer.mem/allocate_in_geometric_progression.pass.cpp