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/**
* Copyright 2021 Huawei Technologies Co., Ltd
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef MINDSPORE_INCLUDE_API_ALLOCATOR_H
#define MINDSPORE_INCLUDE_API_ALLOCATOR_H
#include <memory>
#include "include/api/types.h"
namespace mindspore {
/// \brief Allocator defined a memory pool for malloc memory and free memory dynamically.
class MS_API Allocator {
public:
/// \brief Destructor of MindSpore Allocator.
virtual ~Allocator() = default;
/// \brief Method to request memory.
///
/// \param[in] size Define the memory size to request.
virtual void *Malloc(size_t size) = 0;
/// \brief Method to request memory.
///
/// \param[in] weight Defines the width of memory to request
/// \param[in] height Defines the height of memory to request
/// \param[in] type Defines the data type of memory to request
virtual void *Malloc(size_t weight, size_t height, DataType type) {
return nullptr;
}
/// \brief Method to free memory.
///
/// \param[in] ptr Define the pointer of a certain memory.
virtual void Free(void *ptr) = 0;
/// \brief Reference count of a certain memory.
///
/// \param[in] ptr Define the pointer of a certain memory.
///
/// \return Reference count of a certain memory currently.
virtual int RefCount(void *ptr) = 0;
/// \brief Set reference count of a certain memory.
///
/// \param[in] ptr Define the pointer of a certain memory.
/// \param[in] ref_count Define the reference count to set.
///
/// \return Reference count of a certain memory after setting.
virtual int SetRefCount(void *ptr, int ref_count) = 0;
/// \brief Decrease the reference count of a certain memory.
///
/// \param[in] ptr Define the pointer of a certain memory.
/// \param[in] ref_count Define the reference count to reduce.
///
/// \return Reference count of a certain memory after decreating.
virtual int DecRefCount(void *ptr, int ref_count) = 0;
/// \brief Increase the reference count of a certain memory.
///
/// \param[in] ptr Define the pointer of a certain memory.
/// \param[in] ref_count Define the reference count to increase.
///
/// \return Reference count of a certain memory after increasing.
virtual int IncRefCount(void *ptr, int ref_count) = 0;
/// \brief Static method to create an allocator.
///
/// \return Smart pointer of an allocator.
static std::shared_ptr<Allocator> Create();
/// \brief Prepare a certain memory.
///
/// \param[in] ptr Define the pointer of a certain memory to prepare.
///
/// \return Pointer of ready memory.
virtual void *Prepare(void *ptr) { return ptr; }
protected:
// memory aligned bytes
size_t aligned_size_ = 32;
};
} // namespace mindspore
#endif // MINDSPORE_INCLUDE_API_ALLOCATOR_H
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