libs/capy/src/ex/recycling_memory_resource.cpp
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libs/capy/src/ex/recycling_memory_resource.cpp
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|---|---|---|---|
| 1 | // | ||
| 2 | // Copyright (c) 2025 Vinnie Falco (vinnie.falco@gmail.com) | ||
| 3 | // | ||
| 4 | // Distributed under the Boost Software License, Version 1.0. (See accompanying | ||
| 5 | // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) | ||
| 6 | // | ||
| 7 | // Official repository: https://github.com/cppalliance/capy | ||
| 8 | // | ||
| 9 | |||
| 10 | #include <boost/capy/ex/recycling_memory_resource.hpp> | ||
| 11 | |||
| 12 | namespace boost { | ||
| 13 | namespace capy { | ||
| 14 | |||
| 15 | recycling_memory_resource::pool& | ||
| 16 | 7585 | recycling_memory_resource::local() noexcept | |
| 17 | { | ||
| 18 |
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7585 | static thread_local pool p; |
| 19 | 7585 | return p; | |
| 20 | } | ||
| 21 | |||
| 22 | recycling_memory_resource::pool& | ||
| 23 | 97 | recycling_memory_resource::global() noexcept | |
| 24 | { | ||
| 25 |
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97 | static pool p; |
| 26 | 97 | return p; | |
| 27 | } | ||
| 28 | |||
| 29 | std::mutex& | ||
| 30 | 97 | recycling_memory_resource::global_mutex() noexcept | |
| 31 | { | ||
| 32 | static std::mutex mtx; | ||
| 33 | 97 | return mtx; | |
| 34 | } | ||
| 35 | |||
| 36 | void* | ||
| 37 | 3746 | recycling_memory_resource::do_allocate(std::size_t bytes, std::size_t) | |
| 38 | { | ||
| 39 | 3746 | std::size_t rounded = round_up_pow2(bytes); | |
| 40 | 3746 | std::size_t idx = get_class_index(rounded); | |
| 41 | |||
| 42 |
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3746 | if(idx >= num_classes) |
| 43 | ✗ | return ::operator new(bytes); | |
| 44 | |||
| 45 |
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3746 | if(auto* p = local().buckets[idx].pop()) |
| 46 | 3653 | return p; | |
| 47 | |||
| 48 | { | ||
| 49 |
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93 | std::lock_guard<std::mutex> lock(global_mutex()); |
| 50 |
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93 | if(auto* p = global().buckets[idx].pop(local().buckets[idx])) |
| 51 | ✗ | return p; | |
| 52 | 93 | } | |
| 53 | |||
| 54 | 93 | return ::operator new(rounded); | |
| 55 | } | ||
| 56 | |||
| 57 | void | ||
| 58 | 3746 | recycling_memory_resource::do_deallocate(void* p, std::size_t bytes, std::size_t) | |
| 59 | { | ||
| 60 | 3746 | std::size_t rounded = round_up_pow2(bytes); | |
| 61 | 3746 | std::size_t idx = get_class_index(rounded); | |
| 62 | |||
| 63 |
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3746 | if(idx >= num_classes) |
| 64 | { | ||
| 65 | ✗ | ::operator delete(p); | |
| 66 | ✗ | return; | |
| 67 | } | ||
| 68 | |||
| 69 |
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3746 | if(local().buckets[idx].push(p)) |
| 70 | 3742 | return; | |
| 71 | |||
| 72 | { | ||
| 73 |
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4 | std::lock_guard<std::mutex> lock(global_mutex()); |
| 74 |
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4 | if(global().buckets[idx].push(p)) |
| 75 | 4 | return; | |
| 76 | 4 | } | |
| 77 | |||
| 78 | ✗ | ::operator delete(p); | |
| 79 | } | ||
| 80 | |||
| 81 | std::pmr::memory_resource* | ||
| 82 | 1953 | get_recycling_memory_resource() noexcept | |
| 83 | { | ||
| 84 |
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1953 | static recycling_memory_resource instance; |
| 85 | 1953 | return &instance; | |
| 86 | } | ||
| 87 | |||
| 88 | } // namespace capy | ||
| 89 | } // namespace boost | ||
| 90 |