Home | History | Annotate | Download | only in thermalservice 
      1 /*
      2  * Copyright (C) 2017 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 #define LOG_TAG "thermalserviced"
     18 #include <log/log.h>
     19 
     20 #include "thermalserviced.h"
     21 #include "ThermalService.h"
     22 #include "libthermalcallback/ThermalCallback.h"
     23 
     24 #include <android/hardware/thermal/1.1/IThermal.h>
     25 #include <binder/IPCThreadState.h>
     26 #include <binder/IServiceManager.h>
     27 #include <hidl/HidlTransportSupport.h>
     28 
     29 using namespace android;
     30 using ::android::hardware::thermal::V1_1::IThermal;
     31 using ::android::hardware::thermal::V1_0::Temperature;
     32 using ::android::hardware::thermal::V1_1::IThermalCallback;
     33 using ::android::hardware::thermal::V1_1::implementation::ThermalCallback;
     34 using ::android::hardware::configureRpcThreadpool;
     35 using ::android::hardware::hidl_death_recipient;
     36 using ::android::hidl::base::V1_0::IBase;
     37 using ::android::os::ThermalService;
     38 
     39 template<typename T>
     40 using Return = hardware::Return<T>;
     41 
     42 namespace {
     43 
     44 // Our thermalserviced main object
     45 ThermalServiceDaemon* gThermalServiceDaemon;
     46 
     47 // Thermal HAL client
     48 sp<IThermal> gThermalHal = nullptr;
     49 
     50 // Binder death notifier informing of Thermal HAL death.
     51 struct ThermalServiceDeathRecipient : hidl_death_recipient {
     52     virtual void serviceDied(
     53         uint64_t cookie __unused, const wp<IBase>& who __unused) {
     54         gThermalHal = nullptr;
     55         ALOGE("IThermal HAL died");
     56         gThermalServiceDaemon->getThermalHal();
     57     }
     58 };
     59 
     60 sp<ThermalServiceDeathRecipient> gThermalHalDied = nullptr;
     61 
     62 }  // anonymous namespace
     63 
     64 void ThermalServiceDaemon::thermalServiceStartup() {
     65     // Binder IThermalService startup
     66     mThermalService = new android::os::ThermalService;
     67     mThermalService->publish(mThermalService);
     68     // Register IThermalService object with IThermalCallback
     69     if (mThermalCallback != nullptr)
     70         mThermalCallback->registerThermalService(mThermalService);
     71     IPCThreadState::self()->joinThreadPool();
     72 }
     73 
     74 // Lookup Thermal HAL, register death notifier, register our
     75 // ThermalCallback with the Thermal HAL.
     76 void ThermalServiceDaemon::getThermalHal() {
     77     gThermalHal = IThermal::getService();
     78     if (gThermalHal == nullptr) {
     79         ALOGW("Unable to get Thermal HAL V1.1, vendor thermal event notification not available");
     80         return;
     81     }
     82 
     83     // Binder death notifier for Thermal HAL
     84     if (gThermalHalDied == nullptr)
     85         gThermalHalDied = new ThermalServiceDeathRecipient();
     86 
     87     if (gThermalHalDied != nullptr)
     88         gThermalHal->linkToDeath(gThermalHalDied, 0x451F /* cookie */);
     89 
     90     if (mThermalCallback != nullptr) {
     91         Return<void> ret = gThermalHal->registerThermalCallback(
     92             mThermalCallback);
     93         if (!ret.isOk())
     94             ALOGE("registerThermalCallback failed, status: %s",
     95                   ret.description().c_str());
     96     }
     97 }
     98 
     99 void ThermalServiceDaemon::thermalCallbackStartup() {
    100     // HIDL IThermalCallback startup
    101     // Need at least 2 threads in thread pool since we wait for dead HAL
    102     // to come back on the binder death notification thread and we need
    103     // another thread for the incoming service now available call.
    104     configureRpcThreadpool(2, false /* callerWillJoin */);
    105     mThermalCallback = new ThermalCallback();
    106     // Lookup Thermal HAL and register our ThermalCallback.
    107     getThermalHal();
    108 }
    109 
    110 int main(int /*argc*/, char** /*argv*/) {
    111     gThermalServiceDaemon = new ThermalServiceDaemon();
    112     gThermalServiceDaemon->thermalCallbackStartup();
    113     gThermalServiceDaemon->thermalServiceStartup();
    114     /* NOTREACHED */
    115 }
    116