1 /*
2  * Copyright (c) 2023 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 UTIL_SINGLETON_H
17 #define UTIL_SINGLETON_H
18 
19 #include "cb_func.h"
20 namespace ffrt {
21 template <typename T>
22 class SingletonRegister {
23 public:
Instance_()24     static SingletonRegister<T> &Instance_()
25     {
26         static SingletonRegister<T> ins;
27         return ins;
28     }
29 
Instance()30     static T &Instance()
31     {
32         return Instance_().cb_();
33     }
34 
RegistInsCb(typename SingleInsCB<T>::Instance && cb)35     static void RegistInsCb(typename SingleInsCB<T>::Instance &&cb)
36     {
37         Instance_().cb_ = std::move(cb);
38     }
39 
40 private:
41     typename SingleInsCB<T>::Instance cb_;
42 };
43 } // namespace ffrt
44 #endif