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83ffe9cd | 1 | // Copyright (C) 2018-2023 Free Software Foundation, Inc. |
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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 | ||
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18 | // { dg-do run { target c++17 } } |
19 | ||
20 | #include <memory_resource> | |
21 | #include <testsuite_hooks.h> | |
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22 | #include <testsuite_allocator.h> |
23 | ||
24 | bool eq(const std::pmr::pool_options& lhs, const std::pmr::pool_options& rhs) | |
25 | { | |
26 | return lhs.max_blocks_per_chunk == rhs.max_blocks_per_chunk | |
27 | && lhs.largest_required_pool_block == rhs.largest_required_pool_block; | |
28 | } | |
852a971c JW |
29 | |
30 | void | |
31 | test01() | |
32 | { | |
33 | std::pmr::unsynchronized_pool_resource r0; | |
34 | const std::pmr::pool_options opts = r0.options(); | |
35 | VERIFY( opts.max_blocks_per_chunk != 0 ); | |
36 | VERIFY( opts.largest_required_pool_block != 0 ); | |
37 | ||
38 | std::pmr::unsynchronized_pool_resource r1(opts); | |
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39 | const auto opts1 = r1.options(); |
40 | VERIFY( eq(opts, opts1) ); | |
41 | ||
42 | std::pmr::unsynchronized_pool_resource r2(std::pmr::pool_options{0, 0}); | |
43 | const auto opts2 = r2.options(); | |
44 | VERIFY( eq(opts, opts2) ); | |
45 | } | |
46 | ||
47 | void | |
48 | test02() | |
49 | { | |
50 | std::pmr::pool_options opts{0, 0}; | |
51 | std::size_t num_allocs = 0; | |
52 | ||
53 | __gnu_test::memory_resource test_mr; | |
54 | ||
55 | std::pmr::unsynchronized_pool_resource r1(opts, &test_mr); | |
56 | opts = r1.options(); | |
57 | // opts.largest_required_pool_block should be set to the block size of | |
58 | // the largest pool (this is a GNU extension). Confirm this by checking | |
59 | // that allocations larger than opts.largest_required_pool_block come | |
60 | // directly from the upstream allocator, test_mr, not from r1's pools. | |
61 | ||
62 | // The following should result in a "large" allocation direct from upstream: | |
63 | (void) r1.allocate(opts.largest_required_pool_block + 1); | |
64 | num_allocs = test_mr.number_of_active_allocations(); | |
65 | // This should result in another "large" allocation direct from upstream: | |
66 | (void) r1.allocate(opts.largest_required_pool_block + 1); | |
67 | // Which means the number of upstream allocations should have increased: | |
68 | VERIFY( test_mr.number_of_active_allocations() > num_allocs ); | |
69 | r1.release(); | |
70 | ||
71 | // Repeat with a user-specified block size: | |
72 | opts.largest_required_pool_block = 64; | |
73 | std::pmr::unsynchronized_pool_resource r2(opts, &test_mr); | |
74 | opts = r2.options(); | |
75 | (void) r2.allocate(opts.largest_required_pool_block + 1); | |
76 | num_allocs = test_mr.number_of_active_allocations(); | |
77 | (void) r2.allocate(opts.largest_required_pool_block + 1); | |
78 | VERIFY( test_mr.number_of_active_allocations() > num_allocs ); | |
79 | r2.release(); | |
80 | ||
81 | // Repeat with an odd user-specified block size: | |
82 | opts.largest_required_pool_block = 71; | |
83 | std::pmr::unsynchronized_pool_resource r3(opts, &test_mr); | |
84 | opts = r3.options(); | |
85 | (void) r3.allocate(opts.largest_required_pool_block + 1); | |
86 | num_allocs = test_mr.number_of_active_allocations(); | |
87 | (void) r3.allocate(opts.largest_required_pool_block + 1); | |
88 | VERIFY( test_mr.number_of_active_allocations() > num_allocs ); | |
89 | r3.release(); | |
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90 | } |
91 | ||
92 | int | |
93 | main() | |
94 | { | |
95 | test01(); | |
f2e00585 | 96 | test02(); |
852a971c | 97 | } |