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      1 /*
      2  * Copyright (C) 2016 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 "chre/core/nanoapp.h"
     18 
     19 #include "chre/core/event_loop_manager.h"
     20 #include "chre/platform/assert.h"
     21 #include "chre/platform/fatal_error.h"
     22 #include "chre/platform/log.h"
     23 
     24 namespace chre {
     25 
     26 uint32_t Nanoapp::getInstanceId() const {
     27   return mInstanceId;
     28 }
     29 
     30 void Nanoapp::setInstanceId(uint32_t instanceId) {
     31   mInstanceId = instanceId;
     32 }
     33 
     34 bool Nanoapp::isRegisteredForBroadcastEvent(uint16_t eventType) const {
     35   return (mRegisteredEvents.find(eventType) != mRegisteredEvents.size());
     36 }
     37 
     38 bool Nanoapp::registerForBroadcastEvent(uint16_t eventId) {
     39   if (isRegisteredForBroadcastEvent(eventId)) {
     40     return false;
     41   }
     42 
     43   if (!mRegisteredEvents.push_back(eventId)) {
     44     FATAL_ERROR("App failed to register for event: out of memory");
     45   }
     46 
     47   return true;
     48 }
     49 
     50 bool Nanoapp::unregisterForBroadcastEvent(uint16_t eventId) {
     51   size_t registeredEventIndex = mRegisteredEvents.find(eventId);
     52   if (registeredEventIndex == mRegisteredEvents.size()) {
     53     return false;
     54   }
     55 
     56   mRegisteredEvents.erase(registeredEventIndex);
     57   return true;
     58 }
     59 
     60 void Nanoapp::postEvent(Event *event) {
     61   mEventQueue.push(event);
     62 }
     63 
     64 bool Nanoapp::hasPendingEvent() {
     65   return !mEventQueue.empty();
     66 }
     67 
     68 Event *Nanoapp::processNextEvent() {
     69   Event *event = mEventQueue.pop();
     70 
     71   CHRE_ASSERT_LOG(event != nullptr, "Tried delivering event, but queue empty");
     72   if (event != nullptr) {
     73     handleEvent(event->senderInstanceId, event->eventType, event->eventData);
     74   }
     75 
     76   return event;
     77 }
     78 
     79 }  // namespace chre
     80