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| 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 | #ifndef _LIBCPP___MEMORY_RESOURCE_SYNCHRONIZED_POOL_RESOURCE_H |
| 10 | #define _LIBCPP___MEMORY_RESOURCE_SYNCHRONIZED_POOL_RESOURCE_H |
| 11 | |
| 12 | #include <__config> |
| 13 | #include <__cstddef/size_t.h> |
| 14 | #include <__memory_resource/memory_resource.h> |
| 15 | #include <__memory_resource/pool_options.h> |
| 16 | #include <__memory_resource/unsynchronized_pool_resource.h> |
| 17 | #include <__mutex/mutex.h> |
| 18 | #include <__mutex/unique_lock.h> |
| 19 | |
| 20 | #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) |
| 21 | # pragma GCC system_header |
| 22 | #endif |
| 23 | |
| 24 | #if _LIBCPP_STD_VER >= 17 |
| 25 | |
| 26 | _LIBCPP_BEGIN_NAMESPACE_STD |
| 27 | |
| 28 | namespace pmr { |
| 29 | |
| 30 | // [mem.res.pool.overview] |
| 31 | |
| 32 | class _LIBCPP_AVAILABILITY_PMR _LIBCPP_EXPORTED_FROM_ABI synchronized_pool_resource : public memory_resource { |
| 33 | public: |
| 34 | _LIBCPP_HIDE_FROM_ABI synchronized_pool_resource(const pool_options& __opts, memory_resource* __upstream) |
| 35 | : __unsync_(__opts, __upstream) {} |
| 36 | |
| 37 | _LIBCPP_HIDE_FROM_ABI synchronized_pool_resource() |
| 38 | : synchronized_pool_resource(pool_options(), get_default_resource()) {} |
| 39 | |
| 40 | _LIBCPP_HIDE_FROM_ABI explicit synchronized_pool_resource(memory_resource* __upstream) |
| 41 | : synchronized_pool_resource(pool_options(), __upstream) {} |
| 42 | |
| 43 | _LIBCPP_HIDE_FROM_ABI explicit synchronized_pool_resource(const pool_options& __opts) |
| 44 | : synchronized_pool_resource(__opts, get_default_resource()) {} |
| 45 | |
| 46 | synchronized_pool_resource(const synchronized_pool_resource&) = delete; |
| 47 | |
| 48 | _LIBCPP_HIDE_FROM_ABI_VIRTUAL ~synchronized_pool_resource() override = default; |
| 49 | |
| 50 | synchronized_pool_resource& operator=(const synchronized_pool_resource&) = delete; |
| 51 | |
| 52 | _LIBCPP_HIDE_FROM_ABI void release() { |
| 53 | # if _LIBCPP_HAS_THREADS |
| 54 | unique_lock<mutex> __lk(__mut_); |
| 55 | # endif |
| 56 | __unsync_.release(); |
| 57 | } |
| 58 | |
| 59 | _LIBCPP_HIDE_FROM_ABI memory_resource* upstream_resource() const { return __unsync_.upstream_resource(); } |
| 60 | |
| 61 | _LIBCPP_HIDE_FROM_ABI pool_options options() const { return __unsync_.options(); } |
| 62 | |
| 63 | protected: |
| 64 | _LIBCPP_HIDE_FROM_ABI_VIRTUAL void* do_allocate(size_t __bytes, size_t __align) override { |
| 65 | # if _LIBCPP_HAS_THREADS |
| 66 | unique_lock<mutex> __lk(__mut_); |
| 67 | # endif |
| 68 | return __unsync_.allocate(__bytes, __align); |
| 69 | } |
| 70 | |
| 71 | _LIBCPP_HIDE_FROM_ABI_VIRTUAL void do_deallocate(void* __p, size_t __bytes, size_t __align) override { |
| 72 | # if _LIBCPP_HAS_THREADS |
| 73 | unique_lock<mutex> __lk(__mut_); |
| 74 | # endif |
| 75 | return __unsync_.deallocate(__p, __bytes, __align); |
| 76 | } |
| 77 | |
| 78 | bool do_is_equal(const memory_resource& __other) const noexcept override; // key function |
| 79 | |
| 80 | private: |
| 81 | # if _LIBCPP_HAS_THREADS |
| 82 | mutex __mut_; |
| 83 | # endif |
| 84 | unsynchronized_pool_resource __unsync_; |
| 85 | }; |
| 86 | |
| 87 | } // namespace pmr |
| 88 | |
| 89 | _LIBCPP_END_NAMESPACE_STD |
| 90 | |
| 91 | #endif // _LIBCPP_STD_VER >= 17 |
| 92 | |
| 93 | #endif // _LIBCPP___MEMORY_RESOURCE_SYNCHRONIZED_POOL_RESOURCE_H |
| 94 |
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