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 <sys/types.h> 22 #include <time.h> 23 24 #include <list> 25 26 #include <log/log.h> 27 #include <sysutils/SocketClient.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 pid_t mLastTid[LOG_ID_MAX]; 48 unsigned long mCount; 49 unsigned long mTail; 50 unsigned long mIndex; 51 52 public: 53 LogTimeEntry(LogReader& reader, SocketClient* client, bool nonBlock, 54 unsigned long tail, unsigned int logMask, pid_t pid, 55 log_time start, uint64_t timeout); 56 57 SocketClient* mClient; 58 log_time mStart; 59 struct timespec mTimeout; 60 const bool mNonBlock; 61 const log_time mEnd; // only relevant if mNonBlock 62 63 // Protect List manipulations 64 static void wrlock(void) { 65 pthread_mutex_lock(×Lock); 66 } 67 static void rdlock(void) { 68 pthread_mutex_lock(×Lock); 69 } 70 static void unlock(void) { 71 pthread_mutex_unlock(×Lock); 72 } 73 74 void startReader_Locked(void); 75 76 bool runningReader_Locked(void) const { 77 return threadRunning || mRelease || mError || mNonBlock; 78 } 79 void triggerReader_Locked(void) { 80 pthread_cond_signal(&threadTriggeredCondition); 81 } 82 83 void triggerSkip_Locked(log_id_t id, unsigned int skip) { 84 skipAhead[id] = skip; 85 } 86 void cleanSkip_Locked(void); 87 88 // These called after LogTimeEntry removed from list, lock implicitly held 89 void release_nodelete_Locked(void) { 90 mRelease = true; 91 pthread_cond_signal(&threadTriggeredCondition); 92 // assumes caller code path will call decRef_Locked() 93 } 94 95 void release_Locked(void) { 96 mRelease = true; 97 pthread_cond_signal(&threadTriggeredCondition); 98 if (mRefCount || threadRunning) { 99 return; 100 } 101 // No one else is holding a reference to this 102 delete this; 103 } 104 105 // Called to mark socket in jeopardy 106 void error_Locked(void) { 107 mError = true; 108 } 109 void error(void) { 110 wrlock(); 111 error_Locked(); 112 unlock(); 113 } 114 115 bool isError_Locked(void) const { 116 return mRelease || mError; 117 } 118 119 // Mark Used 120 // Locking implied, grabbed when protection around loop iteration 121 void incRef_Locked(void) { 122 ++mRefCount; 123 } 124 125 bool owned_Locked(void) const { 126 return mRefCount != 0; 127 } 128 129 void decRef_Locked(void) { 130 if ((mRefCount && --mRefCount) || !mRelease || threadRunning) { 131 return; 132 } 133 // No one else is holding a reference to this 134 delete this; 135 } 136 bool isWatching(log_id_t id) { 137 return (mLogMask & (1 << id)) != 0; 138 } 139 // flushTo filter callbacks 140 static int FilterFirstPass(const LogBufferElement* element, void* me); 141 static int FilterSecondPass(const LogBufferElement* element, void* me); 142 }; 143 144 typedef std::list<LogTimeEntry*> LastLogTimes; 145 146 #endif // _LOGD_LOG_TIMES_H__ 147