BatteryPropertiesRegistrar.cpp revision 020369d8724eff2b87350e54e157a609846166e4 
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
31namespace android {
32
33void BatteryPropertiesRegistrar::publish() {
34    defaultServiceManager()->addService(String16("batterypropreg"), this);
35}
36
37void 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
44void BatteryPropertiesRegistrar::registerListener(const sp<IBatteryPropertiesListener>& listener) {
45    {
46        Mutex::Autolock _l(mRegistrationLock);
47        // check whether this is a duplicate
48        for (size_t i = 0; i < mListeners.size(); i++) {
49            if (mListeners[i]->asBinder() == listener->asBinder()) {
50                return;
51            }
52        }
53
54        mListeners.add(listener);
55        listener->asBinder()->linkToDeath(this);
56    }
57    healthd_battery_update();
58}
59
60void BatteryPropertiesRegistrar::unregisterListener(const sp<IBatteryPropertiesListener>& listener) {
61    Mutex::Autolock _l(mRegistrationLock);
62    for (size_t i = 0; i < mListeners.size(); i++) {
63        if (mListeners[i]->asBinder() == listener->asBinder()) {
64            mListeners[i]->asBinder()->unlinkToDeath(this);
65            mListeners.removeAt(i);
66            break;
67        }
68    }
69}
70
71status_t BatteryPropertiesRegistrar::getProperty(int id, struct BatteryProperty *val) {
72    return healthd_get_property(id, val);
73}
74
75status_t BatteryPropertiesRegistrar::dump(int fd, const Vector<String16>& args) {
76    IPCThreadState* self = IPCThreadState::self();
77    const int pid = self->getCallingPid();
78    const int uid = self->getCallingUid();
79    if ((uid != AID_SHELL) &&
80        !PermissionCache::checkPermission(
81                String16("android.permission.DUMP"), pid, uid))
82        return PERMISSION_DENIED;
83
84    healthd_dump_battery_state(fd);
85    return OK;
86}
87
88void BatteryPropertiesRegistrar::binderDied(const wp<IBinder>& who) {
89    Mutex::Autolock _l(mRegistrationLock);
90
91    for (size_t i = 0; i < mListeners.size(); i++) {
92        if (mListeners[i]->asBinder() == who) {
93            mListeners.removeAt(i);
94            break;
95        }
96    }
97}
98
99}  // namespace android
100