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 #include "event_loop_impl.h"
17 #include "db_errno.h"
18 
19 #ifdef EVENT_LOOP_USE_EPOLL
20 #include "event_loop_epoll.h"
21 using EventLoop = DistributedDB::EventLoopEpoll;
22 #else
23 #include "event_loop_select.h"
24 using EventLoop = DistributedDB::EventLoopSelect;
25 #endif
26 
27 namespace DistributedDB {
CreateEventLoop(int & errCode)28 IEventLoop *IEventLoop::CreateEventLoop(int &errCode)
29 {
30     EventLoopImpl *loop = new (std::nothrow) EventLoop;
31     if (loop == nullptr) {
32         errCode = -E_OUT_OF_MEMORY;
33         return nullptr;
34     }
35 
36     errCode = loop->Initialize();
37     if (errCode != E_OK) {
38         delete loop;
39         loop = nullptr;
40     }
41     return loop;
42 }
43 }
44