1 /** 2 * Copyright 2019 Huawei Technologies Co., Ltd 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 #ifndef MINDSPORE_CCSRC_MINDDATA_DATASET_UTIL_MEMORY_POOL_H_ 17 #define MINDSPORE_CCSRC_MINDDATA_DATASET_UTIL_MEMORY_POOL_H_ 18 19 #include <cstddef> 20 #include <cstdint> 21 #include <memory> 22 #include "minddata/dataset/util/status.h" 23 24 namespace mindspore { 25 namespace dataset { 26 // Abstract class of a memory pool 27 class MemoryPool { 28 public: 29 // Allocate a block of size n 30 virtual Status Allocate(size_t, void **) = 0; 31 32 // Enlarge or shrink a block from oldSz to newSz 33 virtual Status Reallocate(void **, size_t old_sz, size_t new_sz) = 0; 34 35 // Free a pointer 36 virtual void Deallocate(void *) = 0; 37 38 // What is the maximum size I can allocate ? 39 virtual uint64_t get_max_size() const = 0; 40 41 virtual int PercentFree() const = 0; 42 43 // Destructor ~MemoryPool()44 virtual ~MemoryPool() {} 45 }; 46 47 Status DeMalloc(std::size_t s, void **p, bool); 48 } // namespace dataset 49 } // namespace mindspore 50 51 void *operator new(std::size_t, mindspore::Status *, std::shared_ptr<mindspore::dataset::MemoryPool>); 52 53 void *operator new[](std::size_t, mindspore::Status *, std::shared_ptr<mindspore::dataset::MemoryPool>); 54 55 void operator delete(void *, std::shared_ptr<mindspore::dataset::MemoryPool>); 56 57 void operator delete[](void *, std::shared_ptr<mindspore::dataset::MemoryPool>); 58 59 #endif // MINDSPORE_CCSRC_MINDDATA_DATASET_UTIL_MEMORY_POOL_H_ 60