126 lines
3.1 KiB
C++
126 lines
3.1 KiB
C++
// Copyright (c) 2016-2018 Kiwano - Nomango
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to deal
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// in the Software without restriction, including without limitation the rights
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// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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// copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in
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// all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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// THE SOFTWARE.
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#pragma once
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#include <utility>
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#include <type_traits>
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#include <kiwano/macros.h>
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namespace kiwano
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{
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namespace memory
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{
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/// \~chinese
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/// @brief 内存分配器
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class KGE_API MemoryAllocator
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{
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public:
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/// \~chinese
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/// @brief 申请内存
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virtual void* Alloc(size_t size) = 0;
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/// \~chinese
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/// @brief 释放内存
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virtual void Free(void* ptr) = 0;
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};
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/// \~chinese
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/// @brief 获取当前内存分配器
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MemoryAllocator* GetAllocator();
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/// \~chinese
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/// @brief 设置当前内存分配器
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void SetAllocator(MemoryAllocator* allocator);
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/// \~chinese
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/// @brief 使用当前内存分配器分配内存
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template <typename _Ty>
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inline void* Alloc()
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{
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return memory::GetAllocator()->Alloc(sizeof(_Ty));
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}
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/// \~chinese
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/// @brief 使用当前内存分配器释放内存
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inline void Free(void* ptr)
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{
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return memory::GetAllocator()->Free(ptr);
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}
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/// \~chinese
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/// @brief 使用当前内存分配器创建对象
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template <typename _Ty>
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inline _Ty* New()
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{
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void* ptr = memory::Alloc<_Ty>();
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if (ptr)
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{
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return ::new (ptr) _Ty;
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}
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return nullptr;
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}
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/// \~chinese
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/// @brief 使用当前内存分配器创建对象
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template <typename _Ty, typename... _Args>
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inline _Ty* New(_Args&&... args)
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{
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void* ptr = memory::Alloc<_Ty>();
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if (ptr)
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{
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return ::new (ptr) _Ty(std::forward<_Args>(args)...);
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}
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return nullptr;
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}
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/// \~chinese
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/// @brief 使用当前内存分配器销毁对象
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template <typename _Ty>
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inline void Delete(_Ty* ptr)
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{
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if (ptr)
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{
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ptr->~_Ty();
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memory::Free(ptr);
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}
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}
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/// \~chinese
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/// @brief 全局内存分配器，使用malloc和free分配内存
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class KGE_API GlobalAllocator : public MemoryAllocator
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{
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public:
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/// \~chinese
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/// @brief 申请内存
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virtual void* Alloc(size_t size) override;
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/// \~chinese
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/// @brief 释放内存
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virtual void Free(void* ptr) override;
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};
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/// \~chinese
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/// @brief 获取全局内存分配器
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GlobalAllocator* GetGlobalAllocator();
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} // namespace memory
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} // namespace kiwano
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