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() { 34 const sp<IServiceManager> sm(defaultServiceManager()); 35 if (sm != NULL) { 36 const String16 name("batterystats"); 37 mBatteryStatService = interface_cast<IBatteryStats>(sm->getService(name)); 38 } 39 } 40 41 bool BatteryService::addSensor(uid_t uid, int handle) { 42 Mutex::Autolock _l(mActivationsLock); 43 Info key(uid, handle); 44 ssize_t index = mActivations.indexOf(key); 45 if (index < 0) { 46 index = mActivations.add(key); 47 } 48 Info& info(mActivations.editItemAt(index)); 49 info.count++; 50 return info.count == 1; 51 } 52 53 bool BatteryService::removeSensor(uid_t uid, int handle) { 54 Mutex::Autolock _l(mActivationsLock); 55 ssize_t index = mActivations.indexOf(Info(uid, handle)); 56 if (index < 0) return false; 57 Info& info(mActivations.editItemAt(index)); 58 info.count--; 59 return info.count == 0; 60 } 61 62 63 void BatteryService::enableSensorImpl(uid_t uid, int handle) { 64 if (mBatteryStatService != 0) { 65 if (addSensor(uid, handle)) { 66 int64_t identity = IPCThreadState::self()->clearCallingIdentity(); 67 mBatteryStatService->noteStartSensor(uid, handle); 68 IPCThreadState::self()->restoreCallingIdentity(identity); 69 } 70 } 71 } 72 void BatteryService::disableSensorImpl(uid_t uid, int handle) { 73 if (mBatteryStatService != 0) { 74 if (removeSensor(uid, handle)) { 75 int64_t identity = IPCThreadState::self()->clearCallingIdentity(); 76 mBatteryStatService->noteStopSensor(uid, handle); 77 IPCThreadState::self()->restoreCallingIdentity(identity); 78 } 79 } 80 } 81 82 void BatteryService::cleanupImpl(uid_t uid) { 83 if (mBatteryStatService != 0) { 84 Mutex::Autolock _l(mActivationsLock); 85 int64_t identity = IPCThreadState::self()->clearCallingIdentity(); 86 for (ssize_t i=0 ; i<mActivations.size() ; i++) { 87 const Info& info(mActivations[i]); 88 if (info.uid == uid) { 89 mBatteryStatService->noteStopSensor(info.uid, info.handle); 90 mActivations.removeAt(i); 91 i--; 92 } 93 } 94 IPCThreadState::self()->restoreCallingIdentity(identity); 95 } 96 } 97 98 ANDROID_SINGLETON_STATIC_INSTANCE(BatteryService) 99 100 // --------------------------------------------------------------------------- 101 }; // namespace android 102 103
