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86 lines
2.3 KiB
86 lines
2.3 KiB
/* Copyright (c) 2016 PaddlePaddle Authors. All Rights Reserve.
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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 "paddle/platform/place.h"
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namespace paddle {
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namespace memory {
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/**
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* \brief Allocate memory block in one place.
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*
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* \param[in] place Allocation place (CPU or GPU).
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* \param[in] size Allocation size.
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*
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* \return Allocated memory block address.
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*
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* \note If return nullptr, it indicates memory allocation failed
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* because insufficient memory in current system. When Alloc
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* function is invoked, you must check the returned memory
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* address is valid or not.
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*/
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template <typename Place>
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void* Alloc(Place place, size_t size);
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/**
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* \brief Free memory block in one place.
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*
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* \param[in] place Allocation place (CPU or GPU).
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* \param[in] ptr Memory block address to free.
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*
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*/
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template <typename Place>
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void Free(Place place, void* ptr);
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/**
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* \brief Total size of used memory in one place.
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*
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* \param[in] place Allocation place (CPU or GPU).
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*
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*/
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template <typename Place>
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size_t Used(Place place);
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struct Usage : public boost::static_visitor<size_t> {
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size_t operator()(const platform::CPUPlace& cpu) const;
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size_t operator()(const platform::CUDAPlace& gpu) const;
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};
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size_t memory_usage(const platform::Place& p);
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/**
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* \brief Free memory block in one place.
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*
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* \note In some cases, custom deleter is used to
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* deallocate the memory automatically for
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* std::unique_ptr<T> in tensor.h.
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*
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*/
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template <typename T, typename Place>
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class PODDeleter {
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static_assert(std::is_pod<T>::value, "T must be POD");
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public:
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explicit PODDeleter(Place place) : place_(place) {}
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void operator()(T* ptr) { Free(place_, static_cast<void*>(ptr)); }
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private:
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Place place_;
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};
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} // namespace memory
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} // namespace paddle
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