1 /*
2  * Copyright (C) 2010 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 #define LOG_TAG "ALooper"
18 #include <utils/Log.h>
19 
20 #include <android/looper.h>
21 #include <utils/Looper.h>
22 #include <binder/IPCThreadState.h>
23 
24 using android::Looper;
25 using android::sp;
26 using android::IPCThreadState;
27 
ALooper_to_Looper(ALooper * alooper)28 static inline Looper* ALooper_to_Looper(ALooper* alooper) {
29     return reinterpret_cast<Looper*>(alooper);
30 }
31 
Looper_to_ALooper(Looper * looper)32 static inline ALooper* Looper_to_ALooper(Looper* looper) {
33     return reinterpret_cast<ALooper*>(looper);
34 }
35 
ALooper_forThread()36 ALooper* ALooper_forThread() {
37     return Looper_to_ALooper(Looper::getForThread().get());
38 }
39 
ALooper_prepare(int opts)40 ALooper* ALooper_prepare(int opts) {
41     return Looper_to_ALooper(Looper::prepare(opts).get());
42 }
43 
ALooper_acquire(ALooper * looper)44 void ALooper_acquire(ALooper* looper) {
45     ALooper_to_Looper(looper)->incStrong((void*)ALooper_acquire);
46 }
47 
ALooper_release(ALooper * looper)48 void ALooper_release(ALooper* looper) {
49     ALooper_to_Looper(looper)->decStrong((void*)ALooper_acquire);
50 }
51 
ALooper_pollOnce(int timeoutMillis,int * outFd,int * outEvents,void ** outData)52 int ALooper_pollOnce(int timeoutMillis, int* outFd, int* outEvents, void** outData) {
53     sp<Looper> looper = Looper::getForThread();
54     if (looper == NULL) {
55         ALOGE("ALooper_pollOnce: No looper for this thread!");
56         return ALOOPER_POLL_ERROR;
57     }
58 
59     IPCThreadState::self()->flushCommands();
60     return looper->pollOnce(timeoutMillis, outFd, outEvents, outData);
61 }
62 
ALooper_pollAll(int timeoutMillis,int * outFd,int * outEvents,void ** outData)63 int ALooper_pollAll(int timeoutMillis, int* outFd, int* outEvents, void** outData) {
64     sp<Looper> looper = Looper::getForThread();
65     if (looper == NULL) {
66         ALOGE("ALooper_pollAll: No looper for this thread!");
67         return ALOOPER_POLL_ERROR;
68     }
69 
70     IPCThreadState::self()->flushCommands();
71     return looper->pollAll(timeoutMillis, outFd, outEvents, outData);
72 }
73 
ALooper_wake(ALooper * looper)74 void ALooper_wake(ALooper* looper) {
75     ALooper_to_Looper(looper)->wake();
76 }
77 
ALooper_addFd(ALooper * looper,int fd,int ident,int events,ALooper_callbackFunc callback,void * data)78 int ALooper_addFd(ALooper* looper, int fd, int ident, int events,
79         ALooper_callbackFunc callback, void* data) {
80     return ALooper_to_Looper(looper)->addFd(fd, ident, events, callback, data);
81 }
82 
ALooper_removeFd(ALooper * looper,int fd)83 int ALooper_removeFd(ALooper* looper, int fd) {
84     return ALooper_to_Looper(looper)->removeFd(fd);
85 }
86