2da049a141
This fixes rdar://110330781, which asked for the feature-test macro for std::pmr to take into account the deployment target. It doesn't fix https://llvm.org/PR62212, though, because the availability markup itself must be disabled until some Clang bugs have been fixed. This is pretty vexing, however at least everything should work once those Clang bugs have been fixed. In the meantime, this patch at least adds the required markup (as disabled) and ensures that the feature-test macro for std::pmr is aware of the deployment target requirement. Differential Revision: https://reviews.llvm.org/D135813
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 <__availability>
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#include <__config>
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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 <cstddef>
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#include <mutex>
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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 !defined(_LIBCPP_HAS_NO_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 !defined(_LIBCPP_HAS_NO_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 !defined(_LIBCPP_HAS_NO_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 !defined(_LIBCPP_HAS_NO_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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