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 **)23 int main(int, char**) {
24   {
25     globalMemCounter.reset();
26 
27     auto mono1                    = std::pmr::monotonic_buffer_resource(std::pmr::new_delete_resource());
28     std::pmr::memory_resource& r1 = mono1;
29 
30     void* ret = r1.allocate(50);
31     assert(ret);
32     ASSERT_WITH_LIBRARY_INTERNAL_ALLOCATIONS(globalMemCounter.checkNewCalledGreaterThan(0));
33     assert(globalMemCounter.checkDeleteCalledEq(0));
34 
35     // mem.res.monotonic.buffer 1.2
36     // A call to deallocate has no effect, thus the amount of memory
37     // consumed increases monotonically until the resource is destroyed.
38     // Check that deallocate is a no-op
39     r1.deallocate(ret, 50);
40     assert(globalMemCounter.checkDeleteCalledEq(0));
41 
42     mono1.release();
43     ASSERT_WITH_LIBRARY_INTERNAL_ALLOCATIONS(globalMemCounter.checkDeleteCalledEq(1));
44     assert(globalMemCounter.checkOutstandingNewEq(0));
45 
46     globalMemCounter.reset();
47 
48     ret = r1.allocate(500);
49     assert(ret);
50     ASSERT_WITH_LIBRARY_INTERNAL_ALLOCATIONS(globalMemCounter.checkNewCalledGreaterThan(0));
51     assert(globalMemCounter.checkDeleteCalledEq(0));
52 
53     // Check that the destructor calls release()
54   }
55   ASSERT_WITH_LIBRARY_INTERNAL_ALLOCATIONS(globalMemCounter.checkDeleteCalledEq(1));
56   assert(globalMemCounter.checkOutstandingNewEq(0));
57 
58   return 0;
59 }
60