1 /*
2  * Copyright (C) 2014 The Android Open Source Project
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  *      http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 
17 #include <pthread.h>
18 #include <semaphore.h>
19 
20 struct loopermessage;
21 
22 class looper {
23     public:
24         looper();
25         ~looper();
26 
27         void post(int what, void *data, bool flush = false);
28         void quit();
29 
30         virtual void handle(int what, void *data);
31 
32     private:
33         void addmsg(loopermessage *msg, bool flush);
34         static void* trampoline(void* p);
35         void loop();
36         loopermessage *head;
37         pthread_t worker;
38         sem_t headwriteprotect;
39         sem_t headdataavailable;
40         bool running;
41 };
42