1 /* 2 * Copyright 2013 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 <utils/Errors.h> 19 #include <utils/Singleton.h> 20 21 #ifndef ANDROID_SF_EVENTLOG_H 22 #define ANDROID_SF_EVENTLOG_H 23 24 // --------------------------------------------------------------------------- 25 namespace android { 26 // --------------------------------------------------------------------------- 27 28 class String8; 29 30 class EventLog : public Singleton<EventLog> { 31 32 public: 33 static void logFrameDurations(const String8& window, 34 const int32_t* durations, size_t numDurations); 35 36 protected: 37 EventLog(); 38 39 private: 40 /* 41 * EventLogBuffer is a helper class to construct an in-memory event log 42 * tag. In this version the buffer is not dynamic, so write operation can 43 * fail if there is not enough space in the temporary buffer. 44 * Once constructed, the buffer can be logger by calling the log() 45 * method. 46 */ 47 48 class TagBuffer { 49 enum { STORAGE_MAX_SIZE = 128 }; 50 int32_t mPos; 51 int32_t mTag; 52 bool mOverflow; 53 char mStorage[STORAGE_MAX_SIZE]; 54 public: 55 explicit TagBuffer(int32_t tag); 56 57 // starts list of items 58 void startList(int8_t count); 59 // terminates the list 60 void endList(); 61 // write a 32-bit integer 62 void writeInt32(int32_t value); 63 // write a 64-bit integer 64 void writeInt64(int64_t value); 65 // write a C string 66 void writeString8(const String8& value); 67 68 // outputs the the buffer to the log 69 void log(); 70 }; 71 72 friend class Singleton<EventLog>; 73 EventLog(const EventLog&); 74 EventLog& operator =(const EventLog&); 75 76 enum { LOGTAG_SF_FRAME_DUR = 60100 }; 77 void doLogFrameDurations(const String8& window, const int32_t* durations, 78 size_t numDurations); 79 }; 80 81 // --------------------------------------------------------------------------- 82 }// namespace android 83 // --------------------------------------------------------------------------- 84 85 #endif /* ANDROID_SF_EVENTLOG_H */ 86