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73 lines
2.0 KiB
73 lines
2.0 KiB
/* Copyright (c) 2016 PaddlePaddle Authors. All Rights Reserved.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License. */
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#pragma once
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#include <stddef.h> // for size_t
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namespace paddle {
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namespace memory {
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namespace detail {
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/**
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* \brief SystemAllocator is the parent class of CPUAllocator,
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* CUDAPinnedAllocator and GPUAllocator. A BuddyAllocator
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* object uses a SystemAllocator* pointing to the
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* underlying system allocator.
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*/
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class SystemAllocator {
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public:
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virtual ~SystemAllocator() {}
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virtual void* Alloc(size_t* index, size_t size) = 0;
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virtual void Free(void* p, size_t size, size_t index) = 0;
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virtual bool UseGpu() const = 0;
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};
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class CPUAllocator : public SystemAllocator {
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public:
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virtual void* Alloc(size_t* index, size_t size);
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virtual void Free(void* p, size_t size, size_t index);
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virtual bool UseGpu() const;
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};
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#ifdef PADDLE_WITH_CUDA
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class GPUAllocator : public SystemAllocator {
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public:
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explicit GPUAllocator(int gpu_id) : gpu_id_(gpu_id) {}
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virtual void* Alloc(size_t* index, size_t size);
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virtual void Free(void* p, size_t size, size_t index);
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virtual bool UseGpu() const;
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private:
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size_t gpu_alloc_size_ = 0;
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size_t fallback_alloc_size_ = 0;
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int gpu_id_;
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};
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class CUDAPinnedAllocator : public SystemAllocator {
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public:
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virtual void* Alloc(size_t* index, size_t size);
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virtual void Free(void* p, size_t size, size_t index);
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virtual bool UseGpu() const;
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private:
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size_t cuda_pinnd_alloc_size_ = 0;
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};
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#endif
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} // namespace detail
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} // namespace memory
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} // namespace paddle
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