Openrtmfp/Cumulus primer (23) thread Logic Analysis II: rtmfpmanager's impact on rtmfpserver

Openrtmfp/Cumulus primer (23) thread Logic Analysis II: rtmfpmanager's impact on rtmfpserver

• Author: Liu Da poechant (Zhong Chao Michael)
• Blog: blog.csdn.net/poechant
• Email: zhongchao.ustc@gmail.com
• Date: August 5^{Th, 2012}

RTMFPManagerAndRTMFPServerSimilarly, it inherits fromStartable.

class RTMFPManager : private Task, private Startable

In the constructorRTMFPServerObject is passed in as a reference to initialize its_serverReference a member.

RTMFPManager(RTMFPServer& server)    : _server(server),      Task(server),      Startable("RTMFPManager")  {    start();}. . .RTMFPServer& _server;

InRTMFPManagerIs called in the constructorstart()The member function is fromStartableInherited. Then, a new name namedRTMFPManager. Then respondRTMFPManager::run()Function.

void run() {    setPriority(Thread::PRIO_LOW);    while(sleep(2000)!=STOP)        waitHandle();}

It should be emphasized thatsetPriorityInLinuxThe setting fails in the environment. For more information, seeCumulusInGithubEnabled onIssue #75Including the thread priority settings.

Here we can seeRTMFPManagerOfhandle(…)Insleep(…)Is once every 2 seconds, and this isRTMFPServerThe thread has an impact. Remember what I saidRTMFPServerThread_wakeUpEventMember? (In openrtmfp/Cumulus primer (22) rtmfpserver thread start and wait)RTMFPManagerSo here this 2 seconds will affectRTMFPServerOf the main cycle.

Startable::WakeUpType Startable::sleep(UInt32 timeout) {    if(_stop)        return STOP;     WakeUpType result = WAKEUP;     if(timeout>0) {         if(!_wakeUpEvent.tryWait(timeout))             result = TIMEOUT;     } else {         _wakeUpEvent.wait();     }    if(_stop)        return STOP;    return result;}

You can modifyRTMFPServerMediumsleep(...)In this way,_wakeUpEvent.tryWait(timeout)According to the specified wait time (that istimeout) To sleep.

RTMFPManagerWhat is the role? Its core lies in itshandleMember functions:

void handle() {    _server.manage();}

This will be calledRTMFPServer::manage()So you need to readRTMFPServerSource codeRTMFPServer::manage()The function is notRTMFPServerRunning in the thread,RTMFPManagerRun in the thread. It is defined as follows:

void RTMFPServer::manage() {    _handshake.manage();    _sessions.manage();}

It manages existing sessions, such as terminating dead sessions.

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For more information, see the csdn blog blog.csdn.net/poechant from LIU Da poechant (zhongchao ).

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