147 lines
3.9 KiB
C++
147 lines
3.9 KiB
C++
/*
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* Copyright (C) 2012-2013 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef _LOGD_LOG_TIMES_H__
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#define _LOGD_LOG_TIMES_H__
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#include <pthread.h>
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#include <sys/types.h>
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#include <time.h>
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#include <list>
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#include <log/log.h>
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#include <sysutils/SocketClient.h>
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class LogReader;
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class LogBufferElement;
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class LogTimeEntry {
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static pthread_mutex_t timesLock;
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unsigned int mRefCount;
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bool mRelease;
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bool mError;
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bool threadRunning;
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bool leadingDropped;
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pthread_cond_t threadTriggeredCondition;
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pthread_t mThread;
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LogReader& mReader;
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static void* threadStart(void* me);
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static void threadStop(void* me);
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const unsigned int mLogMask;
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const pid_t mPid;
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unsigned int skipAhead[LOG_ID_MAX];
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pid_t mLastTid[LOG_ID_MAX];
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unsigned long mCount;
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unsigned long mTail;
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unsigned long mIndex;
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public:
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LogTimeEntry(LogReader& reader, SocketClient* client, bool nonBlock,
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unsigned long tail, unsigned int logMask, pid_t pid,
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log_time start, uint64_t timeout);
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SocketClient* mClient;
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log_time mStart;
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struct timespec mTimeout;
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const bool mNonBlock;
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const log_time mEnd; // only relevant if mNonBlock
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// Protect List manipulations
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static void wrlock(void) {
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pthread_mutex_lock(×Lock);
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}
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static void rdlock(void) {
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pthread_mutex_lock(×Lock);
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}
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static void unlock(void) {
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pthread_mutex_unlock(×Lock);
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}
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void startReader_Locked(void);
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bool runningReader_Locked(void) const {
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return threadRunning || mRelease || mError || mNonBlock;
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}
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void triggerReader_Locked(void) {
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pthread_cond_signal(&threadTriggeredCondition);
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}
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void triggerSkip_Locked(log_id_t id, unsigned int skip) {
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skipAhead[id] = skip;
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}
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void cleanSkip_Locked(void);
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// These called after LogTimeEntry removed from list, lock implicitly held
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void release_nodelete_Locked(void) {
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mRelease = true;
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pthread_cond_signal(&threadTriggeredCondition);
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// assumes caller code path will call decRef_Locked()
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}
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void release_Locked(void) {
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mRelease = true;
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pthread_cond_signal(&threadTriggeredCondition);
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if (mRefCount || threadRunning) {
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return;
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}
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// No one else is holding a reference to this
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delete this;
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}
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// Called to mark socket in jeopardy
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void error_Locked(void) {
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mError = true;
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}
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void error(void) {
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wrlock();
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error_Locked();
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unlock();
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}
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bool isError_Locked(void) const {
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return mRelease || mError;
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}
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// Mark Used
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// Locking implied, grabbed when protection around loop iteration
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void incRef_Locked(void) {
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++mRefCount;
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}
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bool owned_Locked(void) const {
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return mRefCount != 0;
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}
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void decRef_Locked(void) {
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if ((mRefCount && --mRefCount) || !mRelease || threadRunning) {
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return;
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}
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// No one else is holding a reference to this
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delete this;
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}
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bool isWatching(log_id_t id) {
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return (mLogMask & (1 << id)) != 0;
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}
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// flushTo filter callbacks
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static int FilterFirstPass(const LogBufferElement* element, void* me);
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static int FilterSecondPass(const LogBufferElement* element, void* me);
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};
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typedef std::list<LogTimeEntry*> LastLogTimes;
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#endif // _LOGD_LOG_TIMES_H__
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