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 I_SEMAPHORE_H
17 #define I_SEMAPHORE_H
18 
19 #include "utils/aie_macros.h"
20 #include "utils/constants/constants.h"
21 
22 #include <memory>
23 
24 namespace OHOS {
25 namespace AI {
26 class ISemaphore {
27     FORBID_COPY_AND_ASSIGN(ISemaphore);
28     FORBID_CREATE_BY_SELF(ISemaphore);
29 public:
30 
31     /**
32      * create method
33      *
34      * @param count The init num of signal.
35      */
36     static std::shared_ptr<ISemaphore> MakeShared(unsigned int count);
37 
38     /**
39      * wait method
40      *
41      * @param milliSeconds The response time(ms).
42      * @return success or fail
43     */
44     bool Wait(const int milliSeconds = -1);
45 
46     /**
47      *  wake up a waiting signal
48      */
49     void Signal();
50 };
51 } // namespace AI
52 } // namespace OHOS
53 
54 #endif // I_SEMAPHORE_H
55