1 /*
2 * Copyright (C) 2013 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 "BatteryPropertiesRegistrar.h"
18 #include <batteryservice/BatteryService.h>
19 #include <batteryservice/IBatteryPropertiesListener.h>
20 #include <batteryservice/IBatteryPropertiesRegistrar.h>
21 #include <binder/IPCThreadState.h>
22 #include <binder/IServiceManager.h>
23 #include <binder/PermissionCache.h>
24 #include <private/android_filesystem_config.h>
25 #include <utils/Errors.h>
26 #include <utils/Mutex.h>
27 #include <utils/String16.h>
28
29 #include "healthd.h"
30
31 namespace android {
32
publish()33 void BatteryPropertiesRegistrar::publish() {
34 defaultServiceManager()->addService(String16("batteryproperties"), this);
35 }
36
notifyListeners(struct BatteryProperties props)37 void BatteryPropertiesRegistrar::notifyListeners(struct BatteryProperties props) {
38 Mutex::Autolock _l(mRegistrationLock);
39 for (size_t i = 0; i < mListeners.size(); i++) {
40 mListeners[i]->batteryPropertiesChanged(props);
41 }
42 }
43
registerListener(const sp<IBatteryPropertiesListener> & listener)44 void BatteryPropertiesRegistrar::registerListener(const sp<IBatteryPropertiesListener>& listener) {
45 {
46 if (listener == NULL)
47 return;
48 Mutex::Autolock _l(mRegistrationLock);
49 // check whether this is a duplicate
50 for (size_t i = 0; i < mListeners.size(); i++) {
51 if (IInterface::asBinder(mListeners[i]) == IInterface::asBinder(listener)) {
52 return;
53 }
54 }
55
56 mListeners.add(listener);
57 IInterface::asBinder(listener)->linkToDeath(this);
58 }
59 healthd_battery_update();
60 }
61
unregisterListener(const sp<IBatteryPropertiesListener> & listener)62 void BatteryPropertiesRegistrar::unregisterListener(const sp<IBatteryPropertiesListener>& listener) {
63 if (listener == NULL)
64 return;
65 Mutex::Autolock _l(mRegistrationLock);
66 for (size_t i = 0; i < mListeners.size(); i++) {
67 if (IInterface::asBinder(mListeners[i]) == IInterface::asBinder(listener)) {
68 IInterface::asBinder(mListeners[i])->unlinkToDeath(this);
69 mListeners.removeAt(i);
70 break;
71 }
72 }
73 }
74
getProperty(int id,struct BatteryProperty * val)75 status_t BatteryPropertiesRegistrar::getProperty(int id, struct BatteryProperty *val) {
76 return healthd_get_property(id, val);
77 }
78
dump(int fd,const Vector<String16> &)79 status_t BatteryPropertiesRegistrar::dump(int fd, const Vector<String16>& /*args*/) {
80 IPCThreadState* self = IPCThreadState::self();
81 const int pid = self->getCallingPid();
82 const int uid = self->getCallingUid();
83 if ((uid != AID_SHELL) &&
84 !PermissionCache::checkPermission(
85 String16("android.permission.DUMP"), pid, uid))
86 return PERMISSION_DENIED;
87
88 healthd_dump_battery_state(fd);
89 return OK;
90 }
91
binderDied(const wp<IBinder> & who)92 void BatteryPropertiesRegistrar::binderDied(const wp<IBinder>& who) {
93 Mutex::Autolock _l(mRegistrationLock);
94
95 for (size_t i = 0; i < mListeners.size(); i++) {
96 if (IInterface::asBinder(mListeners[i]) == who) {
97 mListeners.removeAt(i);
98 break;
99 }
100 }
101 }
102
103 } // namespace android
104