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-do run }
19 // { dg-options "-std=gnu++17 -pthread" }
20 // { dg-require-effective-target c++17 }
21 // { dg-require-effective-target pthread }
22 // { dg-require-gthreads "" }
23
24 #include <memory_resource>
25 #include <testsuite_allocator.h>
26 #include <testsuite_hooks.h>
27
28 void
test01()29 test01()
30 {
31 __gnu_test::memory_resource test_mr;
32 std::pmr::synchronized_pool_resource r(&test_mr);
33 r.release();
34 VERIFY( test_mr.number_of_active_allocations() == 0 );
35 r.release();
36 VERIFY( test_mr.number_of_active_allocations() == 0 );
37 (void) r.allocate(1);
38 VERIFY( test_mr.number_of_active_allocations() != 0 );
39 r.release();
40 VERIFY( test_mr.number_of_active_allocations() == 0 );
41 r.release();
42 VERIFY( test_mr.number_of_active_allocations() == 0 );
43 }
44
45 void
test02()46 test02()
47 {
48 struct nullable_memory_resource : public std::pmr::memory_resource
49 {
50 void*
51 do_allocate(std::size_t bytes, std::size_t alignment) override
52 { return upstream->allocate(bytes, alignment); }
53
54 void
55 do_deallocate(void* p, std::size_t bytes, std::size_t alignment) override
56 { upstream->deallocate(p, bytes, alignment); }
57
58 bool
59 do_is_equal(const memory_resource& r) const noexcept override
60 { return &r == this; }
61
62 std::pmr::memory_resource* upstream = std::pmr::get_default_resource();
63 };
64
65 nullable_memory_resource test_mr;
66 std::pmr::synchronized_pool_resource r(&test_mr);
67 r.release();
68 test_mr.upstream = nullptr;
69 r.release(); // should not need to call anything through upstream pointer
70 }
71
72 void
test03()73 test03()
74 {
75 __gnu_test::memory_resource test_mr;
76 {
77 std::pmr::synchronized_pool_resource r(&test_mr);
78 // Destructor calls release()
79 }
80 VERIFY( test_mr.number_of_active_allocations() == 0 );
81 {
82 std::pmr::synchronized_pool_resource r(&test_mr);
83 (void) r.allocate(1);
84 VERIFY( test_mr.number_of_active_allocations() != 0 );
85 // Destructor calls release()
86 }
87 VERIFY( test_mr.number_of_active_allocations() == 0 );
88 {
89 std::pmr::synchronized_pool_resource r({10, 16}, &test_mr);
90 (void) r.allocate(2 * r.options().largest_required_pool_block);
91 VERIFY( test_mr.number_of_active_allocations() != 0 );
92 // Destructor calls release()
93 }
94 VERIFY( test_mr.number_of_active_allocations() == 0 );
95 {
96 std::pmr::synchronized_pool_resource r({16, 16}, &test_mr);
97 (void) r.allocate(2);
98 (void) r.allocate(8);
99 (void) r.allocate(16);
100 (void) r.allocate(2);
101 (void) r.allocate(8);
102 (void) r.allocate(16);
103 (void) r.allocate(2 * r.options().largest_required_pool_block);
104 VERIFY( test_mr.number_of_active_allocations() != 0 );
105 // Destructor calls release()
106 }
107 VERIFY( test_mr.number_of_active_allocations() == 0 );
108 }
109
110 int
main()111 main()
112 {
113 test01();
114 test02();
115 test03();
116 }
117