1 /*
2  * Copyright (c) 2021 Huawei Device Co., Ltd.
3  * Licensed under the Apache License, Version 2.0 (the "License");
4  * you may not use this file except in compliance with the License.
5  * You may obtain a copy of the License at
6  *
7  *     http://www.apache.org/licenses/LICENSE-2.0
8  *
9  * Unless required by applicable law or agreed to in writing, software
10  * distributed under the License is distributed on an "AS IS" BASIS,
11  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12  * See the License for the specific language governing permissions and
13  * limitations under the License.
14  */
15 
16 #ifndef SINGLE_INSTANCE_H
17 #define SINGLE_INSTANCE_H
18 
19 #include "aie_macros.h"
20 
21 namespace OHOS {
22 namespace AI {
23 #define DECLARE_SINGLE_INSTANCE_BASE(className)       \
24 public:                                               \
25     static className& GetInstance();                  \
26 FORBID_COPY_AND_ASSIGN(className);
27 
28 #define DECLARE_SINGLE_INSTANCE(className)            \
29     DECLARE_SINGLE_INSTANCE_BASE(className)           \
30 private:                                              \
31 FORBID_CREATE_BY_SELF(className);
32 
33 #define IMPLEMENT_SINGLE_INSTANCE(className)          \
34 className& className::GetInstance()                   \
35 {                                                     \
36     static className instance;                        \
37     return instance;                                  \
38 }
39 } // namespace AI
40 } // namespace OHOS
41 #endif // SINGLE_INSTANCE_H
42