1 /* 2 * Copyright (C) 2012 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 <stdint.h> 18 #include <math.h> 19 #include <sys/types.h> 20 21 #include <utils/Atomic.h> 22 #include <utils/Errors.h> 23 #include <utils/Singleton.h> 24 25 #include <binder/BinderService.h> 26 #include <binder/Parcel.h> 27 28 #include "BatteryService.h" 29 30 namespace android { 31 // --------------------------------------------------------------------------- 32 33 BatteryService::BatteryService() : mBatteryStatService(nullptr) { 34 } 35 36 bool BatteryService::addSensor(uid_t uid, int handle) { 37 Mutex::Autolock _l(mActivationsLock); 38 Info key(uid, handle); 39 ssize_t index = mActivations.indexOf(key); 40 if (index < 0) { 41 index = mActivations.add(key); 42 } 43 Info& info(mActivations.editItemAt(index)); 44 info.count++; 45 return info.count == 1; 46 } 47 48 bool BatteryService::removeSensor(uid_t uid, int handle) { 49 Mutex::Autolock _l(mActivationsLock); 50 ssize_t index = mActivations.indexOf(Info(uid, handle)); 51 if (index < 0) return false; 52 Info& info(mActivations.editItemAt(index)); 53 info.count--; 54 return info.count == 0; 55 } 56 57 58 void BatteryService::enableSensorImpl(uid_t uid, int handle) { 59 if (checkService()) { 60 if (addSensor(uid, handle)) { 61 int64_t identity = IPCThreadState::self()->clearCallingIdentity(); 62 mBatteryStatService->noteStartSensor(uid, handle); 63 IPCThreadState::self()->restoreCallingIdentity(identity); 64 } 65 } 66 } 67 void BatteryService::disableSensorImpl(uid_t uid, int handle) { 68 if (checkService()) { 69 if (removeSensor(uid, handle)) { 70 int64_t identity = IPCThreadState::self()->clearCallingIdentity(); 71 mBatteryStatService->noteStopSensor(uid, handle); 72 IPCThreadState::self()->restoreCallingIdentity(identity); 73 } 74 } 75 } 76 77 void BatteryService::cleanupImpl(uid_t uid) { 78 if (checkService()) { 79 Mutex::Autolock _l(mActivationsLock); 80 int64_t identity = IPCThreadState::self()->clearCallingIdentity(); 81 for (size_t i=0 ; i<mActivations.size() ; i++) { 82 const Info& info(mActivations[i]); 83 if (info.uid == uid) { 84 mBatteryStatService->noteStopSensor(info.uid, info.handle); 85 mActivations.removeAt(i); 86 i--; 87 } 88 } 89 IPCThreadState::self()->restoreCallingIdentity(identity); 90 } 91 } 92 93 bool BatteryService::checkService() { 94 if (mBatteryStatService == nullptr) { 95 const sp<IServiceManager> sm(defaultServiceManager()); 96 if (sm != NULL) { 97 const String16 name("batterystats"); 98 mBatteryStatService = interface_cast<IBatteryStats>(sm->getService(name)); 99 } 100 } 101 return mBatteryStatService != nullptr; 102 } 103 104 ANDROID_SINGLETON_STATIC_INSTANCE(BatteryService) 105 106 // --------------------------------------------------------------------------- 107 }; // namespace android 108 109
