native-service-master.zip_Android Native_android_android service

/* * Copyright 2013-2016, Opersys inc. * * 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. */ #define LOG_TAG "Opersys" #include <stdint.h> #include <sys/types.h> #include <utils/Errors.h> #include <utils/RefBase.h> #include <utils/Singleton.h> #include <binder/IBinder.h> #include <binder/IServiceManager.h> #include <opersys/IOpersysNativeService.h> #include <opersys/OpersysNativeManager.h> // ---------------------------------------------------------------------------- namespace android { // ---------------------------------------------------------------------------- ANDROID_SINGLETON_STATIC_INSTANCE(OpersysNativeManager) OpersysNativeManager::OpersysNativeManager() { } OpersysNativeManager::~OpersysNativeManager() { } void OpersysNativeManager::opersysNativeServiceDied() { mOpersysNativeServer.clear(); } status_t OpersysNativeManager::assertState() const { if (mOpersysNativeServer == NULL) { // try for one second const String16 name("opersysnativeservice"); for (int i=0 ; i<4 ; i++) { status_t err = getService(name, &mOpersysNativeServer); if (err == NAME_NOT_FOUND) { usleep(250000); continue; } if (err != NO_ERROR) { return err; } break; } class DeathObserver : public IBinder::DeathRecipient { OpersysNativeManager& mOpersysNativeManager; virtual void binderDied(const wp<IBinder>& who) { ALOGW("opersysnativeservice died [%p]", who.unsafe_get()); mOpersysNativeManager.opersysNativeServiceDied(); } public: DeathObserver(OpersysNativeManager& mgr) : mOpersysNativeManager(mgr) { } }; mDeathObserver = new DeathObserver(*const_cast<OpersysNativeManager *>(this)); mOpersysNativeServer->asBinder()->linkToDeath(mDeathObserver); } return NO_ERROR; } int OpersysNativeManager::readValue(int myvalue) { if (assertState() == NO_ERROR) { return mOpersysNativeServer->readValue(myvalue); } return -1; } int OpersysNativeManager::writeValue(int myvalue) { if (assertState() == NO_ERROR) { return mOpersysNativeServer->writeValue(myvalue); } return -1; } // ---------------------------------------------------------------------------- }; // namespace android