Line data    Source code

       1              : /**
       2              :  * Copyright (c) 2025 Huawei Technologies Co., Ltd.
       3              :  * This program is free software, you can redistribute it and/or modify it under the terms and conditions of
       4              :  * CANN Open Software License Agreement Version 2.0 (the "License").
       5              :  * Please refer to the License for details. You may not use this file except in compliance with the License.
       6              :  * THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND, EITHER EXPRESS OR IMPLIED,
       7              :  * INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT, MERCHANTABILITY, OR FITNESS FOR A PARTICULAR PURPOSE.
       8              :  * See LICENSE in the root of the software repository for the full text of the License.
       9              :  */
      10              : 
      11              : #ifndef HCCL_REFERENCED_H
      12              : #define HCCL_REFERENCED_H
      13              : 
      14              : namespace Hccl {
      15              :     
      16              : class Referenced {
      17              : public:
      18              :     // 初始化这个类，引用计数设为1，并且将p指向传入的地址
      19           14 :     Referenced(): refCount(0) {}
      20              : 
      21              :     // 引用计数加1
      22           20 :     int Ref()
      23              :     {
      24           20 :         return ++refCount;
      25              :     }
      26              : 
      27              :     // 引用计数减1
      28            5 :     int Unref()
      29              :     {
      30            5 :         return --refCount;
      31              :     }
      32              : 
      33              :     // 返回引用计数
      34           26 :     int Count() const
      35              :     {
      36           26 :         return refCount;
      37              :     }
      38              : 
      39              :     int Clear()
      40              :     {
      41              :         refCount = 0;
      42              :         return refCount;
      43              :     }
      44              :     bool IsZero() const
      45              :     {
      46              :         return refCount == 0;
      47              :     }
      48           41 :     ~Referenced() {}
      49              : private:
      50              :     int refCount; // 引用计数，表示有多少个变量引用这块内存
      51              : };
      52              : 
      53              : } // namespace Hccl
      54              : 
      55              : #endif // HCCL_REFERENCED_H