1 /* 2 * Copyright (C) 2012-2013 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 #ifndef _LOGD_LOG_TIMES_H__ 18 #define _LOGD_LOG_TIMES_H__ 19 20 #include <pthread.h> 21 #include <time.h> 22 #include <sys/types.h> 23 24 #include <list> 25 26 #include <sysutils/SocketClient.h> 27 #include <log/log.h> 28 29 class LogReader; 30 class LogBufferElement; 31 32 class LogTimeEntry { 33 static pthread_mutex_t timesLock; 34 unsigned int mRefCount; 35 bool mRelease; 36 bool mError; 37 bool threadRunning; 38 bool leadingDropped; 39 pthread_cond_t threadTriggeredCondition; 40 pthread_t mThread; 41 LogReader &mReader; 42 static void *threadStart(void *me); 43 static void threadStop(void *me); 44 const unsigned int mLogMask; 45 const pid_t mPid; 46 unsigned int skipAhead[LOG_ID_MAX]; 47 unsigned long mCount; 48 unsigned long mTail; 49 unsigned long mIndex; 50 51 public: 52 LogTimeEntry(LogReader &reader, SocketClient *client, bool nonBlock, 53 unsigned long tail, unsigned int logMask, pid_t pid, 54 uint64_t start, uint64_t timeout); 55 56 SocketClient *mClient; 57 uint64_t mStart; 58 struct timespec mTimeout; 59 const bool mNonBlock; 60 const uint64_t mEnd; // only relevant if mNonBlock 61 62 // Protect List manipulations lock(void)63 static void lock(void) { pthread_mutex_lock(×Lock); } unlock(void)64 static void unlock(void) { pthread_mutex_unlock(×Lock); } 65 66 void startReader_Locked(void); 67 runningReader_Locked(void)68 bool runningReader_Locked(void) const { 69 return threadRunning || mRelease || mError || mNonBlock; 70 } triggerReader_Locked(void)71 void triggerReader_Locked(void) { 72 pthread_cond_signal(&threadTriggeredCondition); 73 } 74 triggerSkip_Locked(log_id_t id,unsigned int skip)75 void triggerSkip_Locked(log_id_t id, unsigned int skip) { skipAhead[id] = skip; } 76 void cleanSkip_Locked(void); 77 78 // These called after LogTimeEntry removed from list, lock implicitly held release_nodelete_Locked(void)79 void release_nodelete_Locked(void) { 80 mRelease = true; 81 pthread_cond_signal(&threadTriggeredCondition); 82 // assumes caller code path will call decRef_Locked() 83 } 84 release_Locked(void)85 void release_Locked(void) { 86 mRelease = true; 87 pthread_cond_signal(&threadTriggeredCondition); 88 if (mRefCount || threadRunning) { 89 return; 90 } 91 // No one else is holding a reference to this 92 delete this; 93 } 94 95 // Called to mark socket in jeopardy error_Locked(void)96 void error_Locked(void) { mError = true; } error(void)97 void error(void) { lock(); error_Locked(); unlock(); } 98 isError_Locked(void)99 bool isError_Locked(void) const { return mRelease || mError; } 100 101 // Mark Used 102 // Locking implied, grabbed when protection around loop iteration incRef_Locked(void)103 void incRef_Locked(void) { ++mRefCount; } 104 owned_Locked(void)105 bool owned_Locked(void) const { return mRefCount != 0; } 106 decRef_Locked(void)107 void decRef_Locked(void) { 108 if ((mRefCount && --mRefCount) || !mRelease || threadRunning) { 109 return; 110 } 111 // No one else is holding a reference to this 112 delete this; 113 } isWatching(log_id_t id)114 bool isWatching(log_id_t id) { return (mLogMask & (1<<id)) != 0; } 115 // flushTo filter callbacks 116 static int FilterFirstPass(const LogBufferElement *element, void *me); 117 static int FilterSecondPass(const LogBufferElement *element, void *me); 118 }; 119 120 typedef std::list<LogTimeEntry *> LastLogTimes; 121 122 #endif // _LOGD_LOG_TIMES_H__ 123