| /* |
| * Copyright (C) 2012 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| #include <stdint.h> |
| #include <math.h> |
| #include <sys/types.h> |
| |
| #include <cutils/atomic.h> |
| #include <utils/Errors.h> |
| #include <utils/Singleton.h> |
| |
| #include <binder/BinderService.h> |
| #include <binder/Parcel.h> |
| |
| #include "BatteryService.h" |
| |
| namespace android { |
| // --------------------------------------------------------------------------- |
| |
| BatteryService::BatteryService() : mBatteryStatService(nullptr) { |
| } |
| |
| bool BatteryService::addSensor(uid_t uid, int handle) { |
| Mutex::Autolock _l(mActivationsLock); |
| Info key(uid, handle); |
| ssize_t index = mActivations.indexOf(key); |
| if (index < 0) { |
| index = mActivations.add(key); |
| } |
| Info& info(mActivations.editItemAt(index)); |
| info.count++; |
| return info.count == 1; |
| } |
| |
| bool BatteryService::removeSensor(uid_t uid, int handle) { |
| Mutex::Autolock _l(mActivationsLock); |
| ssize_t index = mActivations.indexOf(Info(uid, handle)); |
| if (index < 0) return false; |
| Info& info(mActivations.editItemAt(index)); |
| info.count--; |
| return info.count == 0; |
| } |
| |
| |
| void BatteryService::enableSensorImpl(uid_t uid, int handle) { |
| if (checkService()) { |
| if (addSensor(uid, handle)) { |
| int64_t identity = IPCThreadState::self()->clearCallingIdentity(); |
| mBatteryStatService->noteStartSensor(uid, handle); |
| IPCThreadState::self()->restoreCallingIdentity(identity); |
| } |
| } |
| } |
| void BatteryService::disableSensorImpl(uid_t uid, int handle) { |
| if (checkService()) { |
| if (removeSensor(uid, handle)) { |
| int64_t identity = IPCThreadState::self()->clearCallingIdentity(); |
| mBatteryStatService->noteStopSensor(uid, handle); |
| IPCThreadState::self()->restoreCallingIdentity(identity); |
| } |
| } |
| } |
| |
| void BatteryService::cleanupImpl(uid_t uid) { |
| if (checkService()) { |
| Mutex::Autolock _l(mActivationsLock); |
| int64_t identity = IPCThreadState::self()->clearCallingIdentity(); |
| for (size_t i=0 ; i<mActivations.size() ; ) { |
| const Info& info(mActivations[i]); |
| if (info.uid == uid) { |
| mBatteryStatService->noteStopSensor(info.uid, info.handle); |
| mActivations.removeAt(i); |
| } else { |
| i++; |
| } |
| } |
| IPCThreadState::self()->restoreCallingIdentity(identity); |
| } |
| } |
| |
| bool BatteryService::checkService() { |
| if (mBatteryStatService == nullptr) { |
| const sp<IServiceManager> sm(defaultServiceManager()); |
| if (sm != nullptr) { |
| const String16 name("batterystats"); |
| mBatteryStatService = interface_cast<IBatteryStats>(sm->getService(name)); |
| } |
| } |
| return mBatteryStatService != nullptr; |
| } |
| |
| ANDROID_SINGLETON_STATIC_INSTANCE(BatteryService) |
| |
| // --------------------------------------------------------------------------- |
| }; // namespace android |