c3656afdf1
This reverts commit c861fe8a71e64f3d2108c58147e7375cd9314521. Unfortunately, this use of hidden visibility attributes causes user-defined specializations of standard-library types to also be marked hidden by default, which is incorrect. See discussion thread on #131156. ...and also reverts the follow-up commits: Revert "[libc++] Add explicit ABI annotations to functions from the block runtime declared in <__functional/function.h> (#140592)" This reverts commit 3e4c9dc299c35155934688184319d391b298fff7. Revert "[libc++] Make ABI annotations explicit for windows-specific code (#140507)" This reverts commit f73287e623a6c2e4a3485832bc3e10860cd26eb5. Revert "[libc++][NFC] Replace a few "namespace std" with the correct macro (#140510)" This reverts commit 1d411f27c769a32cb22ce50b9dc4421e34fd40dd.
94 lines
3.0 KiB
C++
94 lines
3.0 KiB
C++
//===----------------------------------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#ifndef _LIBCPP___MEMORY_RESOURCE_SYNCHRONIZED_POOL_RESOURCE_H
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#define _LIBCPP___MEMORY_RESOURCE_SYNCHRONIZED_POOL_RESOURCE_H
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#include <__config>
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#include <__cstddef/size_t.h>
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#include <__memory_resource/memory_resource.h>
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#include <__memory_resource/pool_options.h>
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#include <__memory_resource/unsynchronized_pool_resource.h>
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#include <__mutex/mutex.h>
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#include <__mutex/unique_lock.h>
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#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
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# pragma GCC system_header
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#endif
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#if _LIBCPP_STD_VER >= 17
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_LIBCPP_BEGIN_NAMESPACE_STD
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namespace pmr {
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// [mem.res.pool.overview]
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class _LIBCPP_AVAILABILITY_PMR _LIBCPP_EXPORTED_FROM_ABI synchronized_pool_resource : public memory_resource {
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public:
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_LIBCPP_HIDE_FROM_ABI synchronized_pool_resource(const pool_options& __opts, memory_resource* __upstream)
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: __unsync_(__opts, __upstream) {}
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_LIBCPP_HIDE_FROM_ABI synchronized_pool_resource()
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: synchronized_pool_resource(pool_options(), get_default_resource()) {}
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_LIBCPP_HIDE_FROM_ABI explicit synchronized_pool_resource(memory_resource* __upstream)
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: synchronized_pool_resource(pool_options(), __upstream) {}
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_LIBCPP_HIDE_FROM_ABI explicit synchronized_pool_resource(const pool_options& __opts)
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: synchronized_pool_resource(__opts, get_default_resource()) {}
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synchronized_pool_resource(const synchronized_pool_resource&) = delete;
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_LIBCPP_HIDE_FROM_ABI_VIRTUAL ~synchronized_pool_resource() override = default;
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synchronized_pool_resource& operator=(const synchronized_pool_resource&) = delete;
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_LIBCPP_HIDE_FROM_ABI void release() {
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# if _LIBCPP_HAS_THREADS
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unique_lock<mutex> __lk(__mut_);
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# endif
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__unsync_.release();
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}
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_LIBCPP_HIDE_FROM_ABI memory_resource* upstream_resource() const { return __unsync_.upstream_resource(); }
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_LIBCPP_HIDE_FROM_ABI pool_options options() const { return __unsync_.options(); }
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protected:
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_LIBCPP_HIDE_FROM_ABI_VIRTUAL void* do_allocate(size_t __bytes, size_t __align) override {
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# if _LIBCPP_HAS_THREADS
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unique_lock<mutex> __lk(__mut_);
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# endif
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return __unsync_.allocate(__bytes, __align);
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}
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_LIBCPP_HIDE_FROM_ABI_VIRTUAL void do_deallocate(void* __p, size_t __bytes, size_t __align) override {
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# if _LIBCPP_HAS_THREADS
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unique_lock<mutex> __lk(__mut_);
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# endif
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return __unsync_.deallocate(__p, __bytes, __align);
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}
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bool do_is_equal(const memory_resource& __other) const noexcept override; // key function
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private:
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# if _LIBCPP_HAS_THREADS
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mutex __mut_;
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# endif
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unsynchronized_pool_resource __unsync_;
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};
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} // namespace pmr
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_LIBCPP_END_NAMESPACE_STD
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#endif // _LIBCPP_STD_VER >= 17
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#endif // _LIBCPP___MEMORY_RESOURCE_SYNCHRONIZED_POOL_RESOURCE_H
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