1 // Copyright (C) 2018-2020 Free Software Foundation, Inc.
2 //
3 // This file is part of the GNU ISO C++ Library. This library is free
4 // software; you can redistribute it and/or modify it under the
5 // terms of the GNU General Public License as published by the
6 // Free Software Foundation; either version 3, or (at your option)
7 // any later version.
8
9 // This library is distributed in the hope that it will be useful,
10 // but WITHOUT ANY WARRANTY; without even the implied warranty of
11 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 // GNU General Public License for more details.
13
14 // You should have received a copy of the GNU General Public License along
15 // with this library; see the file COPYING3. If not see
16 // <http://www.gnu.org/licenses/>.
17
18 // { dg-options "-std=gnu++17" }
19 // { dg-do run { target c++17 } }
20
21 #include <memory_resource>
22 #include <testsuite_allocator.h>
23 #include <testsuite_hooks.h>
24
25 void
test01()26 test01()
27 {
28 __gnu_test::memory_resource test_mr;
29 std::pmr::unsynchronized_pool_resource r(&test_mr);
30 r.release();
31 VERIFY( test_mr.number_of_active_allocations() == 0 );
32 r.release();
33 VERIFY( test_mr.number_of_active_allocations() == 0 );
34 (void) r.allocate(1);
35 VERIFY( test_mr.number_of_active_allocations() != 0 );
36 r.release();
37 VERIFY( test_mr.number_of_active_allocations() == 0 );
38 r.release();
39 VERIFY( test_mr.number_of_active_allocations() == 0 );
40 }
41
42 void
test02()43 test02()
44 {
45 struct nullable_memory_resource : public std::pmr::memory_resource
46 {
47 void*
48 do_allocate(std::size_t bytes, std::size_t alignment) override
49 { return upstream->allocate(bytes, alignment); }
50
51 void
52 do_deallocate(void* p, std::size_t bytes, std::size_t alignment) override
53 { upstream->deallocate(p, bytes, alignment); }
54
55 bool
56 do_is_equal(const memory_resource& r) const noexcept override
57 { return &r == this; }
58
59 std::pmr::memory_resource* upstream = std::pmr::get_default_resource();
60 };
61
62 nullable_memory_resource test_mr;
63 std::pmr::unsynchronized_pool_resource r(&test_mr);
64 r.release();
65 test_mr.upstream = nullptr;
66 r.release(); // should not need to call anything through upstream pointer
67 }
68
69 void
test03()70 test03()
71 {
72 __gnu_test::memory_resource test_mr;
73 {
74 std::pmr::unsynchronized_pool_resource r(&test_mr);
75 // Destructor calls release()
76 }
77 VERIFY( test_mr.number_of_active_allocations() == 0 );
78 {
79 std::pmr::unsynchronized_pool_resource r(&test_mr);
80 (void) r.allocate(1);
81 VERIFY( test_mr.number_of_active_allocations() != 0 );
82 // Destructor calls release()
83 }
84 VERIFY( test_mr.number_of_active_allocations() == 0 );
85 {
86 std::pmr::unsynchronized_pool_resource r({10, 16}, &test_mr);
87 (void) r.allocate(2 * r.options().largest_required_pool_block);
88 VERIFY( test_mr.number_of_active_allocations() != 0 );
89 // Destructor calls release()
90 }
91 VERIFY( test_mr.number_of_active_allocations() == 0 );
92 {
93 std::pmr::unsynchronized_pool_resource r({16, 16}, &test_mr);
94 (void) r.allocate(2);
95 (void) r.allocate(8);
96 (void) r.allocate(16);
97 (void) r.allocate(2);
98 (void) r.allocate(8);
99 (void) r.allocate(16);
100 (void) r.allocate(2 * r.options().largest_required_pool_block);
101 VERIFY( test_mr.number_of_active_allocations() != 0 );
102 // Destructor calls release()
103 }
104 VERIFY( test_mr.number_of_active_allocations() == 0 );
105 }
106
107 int
main()108 main()
109 {
110 test01();
111 test02();
112 test03();
113 }
114