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 IEVENT_LOOP_H
17 #define IEVENT_LOOP_H
18 
19 #include "ref_object.h"
20 #include "macro_utils.h"
21 
22 namespace DistributedDB {
23 class IEvent;
24 
25 // Abstract of event loop.
26 class IEventLoop : public virtual RefObject {
27 public:
28     IEventLoop() = default;
29 
30     DISABLE_COPY_ASSIGN_MOVE(IEventLoop);
31 
32     // Add an event object to the loop.
33     virtual int Add(IEvent *event) = 0;
34 
35     // Remove an event object from the loop.
36     virtual int Remove(IEvent *event) = 0;
37 
38     // Run the loop.
39     virtual int Run() = 0;
40 
41     virtual int Stop() = 0;
42 
43     // Create a loop object.
44     static IEventLoop *CreateEventLoop(int &errCode);
45 
46 protected:
~IEventLoop()47     virtual ~IEventLoop() {};
48 };
49 }
50 
51 #endif // IEVENT_LOOP_H
52