common_clock_service.cpp revision 9158825f9c41869689d6b1786d7c7aa8bdd524ce 
1/*
2 * Copyright (C) 2011 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 <common_time/local_clock.h>
18#include <utils/String8.h>
19
20#include "common_clock_service.h"
21#include "common_clock.h"
22#include "common_time_server.h"
23
24namespace android {
25
26sp<CommonClockService> CommonClockService::instantiate(
27        CommonTimeServer& timeServer) {
28    sp<CommonClockService> tcc = new CommonClockService(timeServer);
29    if (tcc == NULL)
30        return NULL;
31
32    defaultServiceManager()->addService(ICommonClock::kServiceName, tcc);
33    return tcc;
34}
35
36status_t CommonClockService::dump(int fd, const Vector<String16>& args) {
37    Mutex::Autolock lock(mRegistrationLock);
38    return mTimeServer.dumpClockInterface(fd, args, mListeners.size());
39}
40
41status_t CommonClockService::isCommonTimeValid(bool* valid,
42                                               uint32_t* timelineID) {
43    return mTimeServer.isCommonTimeValid(valid, timelineID);
44}
45
46status_t CommonClockService::commonTimeToLocalTime(int64_t  commonTime,
47                                                   int64_t* localTime) {
48    return mTimeServer.getCommonClock().commonToLocal(commonTime, localTime);
49}
50
51status_t CommonClockService::localTimeToCommonTime(int64_t  localTime,
52                                                   int64_t* commonTime) {
53    return mTimeServer.getCommonClock().localToCommon(localTime, commonTime);
54}
55
56status_t CommonClockService::getCommonTime(int64_t* commonTime) {
57    return localTimeToCommonTime(mTimeServer.getLocalClock().getLocalTime(), commonTime);
58}
59
60status_t CommonClockService::getCommonFreq(uint64_t* freq) {
61    *freq = mTimeServer.getCommonClock().getCommonFreq();
62    return OK;
63}
64
65status_t CommonClockService::getLocalTime(int64_t* localTime) {
66    *localTime = mTimeServer.getLocalClock().getLocalTime();
67    return OK;
68}
69
70status_t CommonClockService::getLocalFreq(uint64_t* freq) {
71    *freq = mTimeServer.getLocalClock().getLocalFreq();
72    return OK;
73}
74
75status_t CommonClockService::getEstimatedError(int32_t* estimate) {
76    *estimate = mTimeServer.getEstimatedError();
77    return OK;
78}
79
80status_t CommonClockService::getTimelineID(uint64_t* id) {
81    *id = mTimeServer.getTimelineID();
82    return OK;
83}
84
85status_t CommonClockService::getState(State* state) {
86    *state = mTimeServer.getState();
87    return OK;
88}
89
90status_t CommonClockService::getMasterAddr(struct sockaddr_storage* addr) {
91    return mTimeServer.getMasterAddr(addr);
92}
93
94status_t CommonClockService::registerListener(
95        const sp<ICommonClockListener>& listener) {
96    Mutex::Autolock lock(mRegistrationLock);
97
98    {   // scoping for autolock pattern
99        Mutex::Autolock lock(mCallbackLock);
100        // check whether this is a duplicate
101        for (size_t i = 0; i < mListeners.size(); i++) {
102            if (mListeners[i]->asBinder() == listener->asBinder())
103                return ALREADY_EXISTS;
104        }
105    }
106
107    mListeners.add(listener);
108    mTimeServer.reevaluateAutoDisableState(0 != mListeners.size());
109    return listener->asBinder()->linkToDeath(this);
110}
111
112status_t CommonClockService::unregisterListener(
113        const sp<ICommonClockListener>& listener) {
114    Mutex::Autolock lock(mRegistrationLock);
115    status_t ret_val = NAME_NOT_FOUND;
116
117    {   // scoping for autolock pattern
118        Mutex::Autolock lock(mCallbackLock);
119        for (size_t i = 0; i < mListeners.size(); i++) {
120            if (mListeners[i]->asBinder() == listener->asBinder()) {
121                mListeners[i]->asBinder()->unlinkToDeath(this);
122                mListeners.removeAt(i);
123                ret_val = OK;
124                break;
125            }
126        }
127    }
128
129    mTimeServer.reevaluateAutoDisableState(0 != mListeners.size());
130    return ret_val;
131}
132
133void CommonClockService::binderDied(const wp<IBinder>& who) {
134    Mutex::Autolock lock(mRegistrationLock);
135
136    {   // scoping for autolock pattern
137        Mutex::Autolock lock(mCallbackLock);
138        for (size_t i = 0; i < mListeners.size(); i++) {
139            if (mListeners[i]->asBinder() == who) {
140                mListeners.removeAt(i);
141                break;
142            }
143        }
144    }
145
146    mTimeServer.reevaluateAutoDisableState(0 != mListeners.size());
147}
148
149void CommonClockService::notifyOnTimelineChanged(uint64_t timelineID) {
150    Mutex::Autolock lock(mCallbackLock);
151
152    for (size_t i = 0; i < mListeners.size(); i++) {
153        mListeners[i]->onTimelineChanged(timelineID);
154    }
155}
156
157}; // namespace android
158