| //===----------------------------------------------------------------------===// |
| // |
| // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| // See https://llvm.org/LICENSE.txt for license information. |
| // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #ifndef _LIBCPP___MEMORY_RESOURCE_SYNCHRONIZED_POOL_RESOURCE_H |
| #define _LIBCPP___MEMORY_RESOURCE_SYNCHRONIZED_POOL_RESOURCE_H |
| |
| #include <__config> |
| #include <__cstddef/size_t.h> |
| #include <__memory_resource/memory_resource.h> |
| #include <__memory_resource/pool_options.h> |
| #include <__memory_resource/unsynchronized_pool_resource.h> |
| #include <__mutex/mutex.h> |
| #include <__mutex/unique_lock.h> |
| |
| #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) |
| # pragma GCC system_header |
| #endif |
| |
| #if _LIBCPP_STD_VER >= 17 |
| |
| _LIBCPP_BEGIN_NAMESPACE_STD |
| |
| namespace pmr { |
| |
| // [mem.res.pool.overview] |
| |
| class _LIBCPP_AVAILABILITY_PMR _LIBCPP_EXPORTED_FROM_ABI synchronized_pool_resource : public memory_resource { |
| public: |
| _LIBCPP_HIDE_FROM_ABI synchronized_pool_resource(const pool_options& __opts, memory_resource* __upstream) |
| : __unsync_(__opts, __upstream) {} |
| |
| _LIBCPP_HIDE_FROM_ABI synchronized_pool_resource() |
| : synchronized_pool_resource(pool_options(), get_default_resource()) {} |
| |
| _LIBCPP_HIDE_FROM_ABI explicit synchronized_pool_resource(memory_resource* __upstream) |
| : synchronized_pool_resource(pool_options(), __upstream) {} |
| |
| _LIBCPP_HIDE_FROM_ABI explicit synchronized_pool_resource(const pool_options& __opts) |
| : synchronized_pool_resource(__opts, get_default_resource()) {} |
| |
| synchronized_pool_resource(const synchronized_pool_resource&) = delete; |
| |
| _LIBCPP_HIDE_FROM_ABI_VIRTUAL ~synchronized_pool_resource() override = default; |
| |
| synchronized_pool_resource& operator=(const synchronized_pool_resource&) = delete; |
| |
| _LIBCPP_HIDE_FROM_ABI void release() { |
| # if _LIBCPP_HAS_THREADS |
| unique_lock<mutex> __lk(__mut_); |
| # endif |
| __unsync_.release(); |
| } |
| |
| _LIBCPP_HIDE_FROM_ABI memory_resource* upstream_resource() const { return __unsync_.upstream_resource(); } |
| |
| _LIBCPP_HIDE_FROM_ABI pool_options options() const { return __unsync_.options(); } |
| |
| protected: |
| _LIBCPP_HIDE_FROM_ABI_VIRTUAL void* do_allocate(size_t __bytes, size_t __align) override { |
| # if _LIBCPP_HAS_THREADS |
| unique_lock<mutex> __lk(__mut_); |
| # endif |
| return __unsync_.allocate(__bytes, __align); |
| } |
| |
| _LIBCPP_HIDE_FROM_ABI_VIRTUAL void do_deallocate(void* __p, size_t __bytes, size_t __align) override { |
| # if _LIBCPP_HAS_THREADS |
| unique_lock<mutex> __lk(__mut_); |
| # endif |
| return __unsync_.deallocate(__p, __bytes, __align); |
| } |
| |
| bool do_is_equal(const memory_resource& __other) const noexcept override; // key function |
| |
| private: |
| # if _LIBCPP_HAS_THREADS |
| mutex __mut_; |
| # endif |
| unsynchronized_pool_resource __unsync_; |
| }; |
| |
| } // namespace pmr |
| |
| _LIBCPP_END_NAMESPACE_STD |
| |
| #endif // _LIBCPP_STD_VER >= 17 |
| |
| #endif // _LIBCPP___MEMORY_RESOURCE_SYNCHRONIZED_POOL_RESOURCE_H |