forked from huawei/mindspore2022
74 lines
2.1 KiB
C++
74 lines
2.1 KiB
C++
/**
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* Copyright 2019 Huawei Technologies Co., Ltd
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*
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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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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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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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*/
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#ifndef DATASET_UTIL_MEMORY_POOL_H_
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#define DATASET_UTIL_MEMORY_POOL_H_
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#include <cstddef>
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#include <cstdint>
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#include <memory>
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#include "dataset/util/status.h"
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namespace mindspore {
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namespace dataset {
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// Abstract class of a memory pool
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class MemoryPool {
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public:
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// Allocate a block of size n
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virtual Status Allocate(size_t, void **) = 0;
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// Enlarge or shrink a block from oldSz to newSz
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virtual Status Reallocate(void **, size_t old_sz, size_t new_sz) = 0;
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// Free a pointer
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virtual void Deallocate(void *) = 0;
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// What is the maximum size I can allocate ?
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virtual uint64_t get_max_size() const = 0;
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virtual int PercentFree() const = 0;
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// Destructor
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virtual ~MemoryPool() {}
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};
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// Used by unique_ptr
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template <typename T>
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class Deleter {
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public:
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explicit Deleter(std::shared_ptr<MemoryPool> &mp) : mp_(mp) {}
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~Deleter() = default;
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void operator()(T *ptr) const { mp_->Deallocate(ptr); }
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private:
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std::shared_ptr<MemoryPool> mp_;
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};
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Status DeMalloc(std::size_t s, void **p, bool);
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} // namespace dataset
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} // namespace mindspore
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void *operator new(std::size_t, mindspore::dataset::Status *, std::shared_ptr<mindspore::dataset::MemoryPool>);
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void *operator new[](std::size_t, mindspore::dataset::Status *, std::shared_ptr<mindspore::dataset::MemoryPool>);
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void operator delete(void *, std::shared_ptr<mindspore::dataset::MemoryPool>);
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void operator delete[](void *, std::shared_ptr<mindspore::dataset::MemoryPool>);
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#endif // DATASET_UTIL_MEMORY_POOL_H_
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