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 #ifndef CHRE_CORE_EVENT_H_ 18 #define CHRE_CORE_EVENT_H_ 19 20 #include "chre_api/chre/event.h" 21 #include "chre/platform/assert.h" 22 #include "chre/util/non_copyable.h" 23 24 #include <cstdint> 25 26 namespace chre { 27 28 //! Instance ID used for events sent by the system 29 constexpr uint32_t kSystemInstanceId = 0; 30 31 //! Target instance ID used to deliver a message to all nanoapps registered for 32 //! the event 33 constexpr uint32_t kBroadcastInstanceId = UINT32_MAX; 34 35 //! This value can be used in a nanoapp's own instance ID to indicate that the 36 //! ID is invalid/not assigned yet 37 constexpr uint32_t kInvalidInstanceId = kBroadcastInstanceId; 38 39 class Event : public NonCopyable { 40 public: 41 Event(uint16_t eventType, void *eventData, 42 chreEventCompleteFunction *freeCallback, 43 uint32_t senderInstanceId = kSystemInstanceId, 44 uint32_t targetInstanceId = kBroadcastInstanceId); 45 incrementRefCount()46 void incrementRefCount() { 47 mRefCount++; 48 CHRE_ASSERT(mRefCount != 0); 49 } 50 decrementRefCount()51 void decrementRefCount() { 52 CHRE_ASSERT(mRefCount > 0); 53 mRefCount--; 54 } 55 isUnreferenced()56 bool isUnreferenced() const { 57 return (mRefCount == 0); 58 } 59 60 const uint16_t eventType; 61 void * const eventData; 62 chreEventCompleteFunction * const freeCallback; 63 const uint32_t senderInstanceId; 64 const uint32_t targetInstanceId; 65 66 private: 67 size_t mRefCount = 0; 68 }; 69 70 } 71 72 #endif // CHRE_CORE_EVENT_H_ 73