101 lines
3.4 KiB
C++
101 lines
3.4 KiB
C++
/*************************************************************************\
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* Copyright (c) 2002 The University of Chicago, as Operator of Argonne
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* National Laboratory.
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* Copyright (c) 2002 The Regents of the University of California, as
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* Operator of Los Alamos National Laboratory.
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* EPICS BASE Versions 3.13.7
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* and higher are distributed subject to a Software License Agreement found
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* in file LICENSE that is included with this distribution.
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\*************************************************************************/
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/*
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* $Id$
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*
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*
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* L O S A L A M O S
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* Los Alamos National Laboratory
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* Los Alamos, New Mexico 87545
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*
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* Copyright, 1986, The Regents of the University of California.
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*
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*
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* Author Jeffrey O. Hill
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* johill@lanl.gov
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*/
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#ifndef ipAddrToAsciiAsynchronous_h
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#define ipAddrToAsciiAsynchronous_h
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#include "epicsThread.h"
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#include "epicsMutex.h"
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#include "epicsEvent.h"
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#include "tsDLList.h"
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#include "osiSock.h"
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#include "shareLib.h"
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class ipAddrToAsciiAsynchronous;
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// - this class executes the synchronous DNS query
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// - it creates one thread
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class ipAddrToAsciiEngine : public epicsThreadRunable {
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public:
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epicsShareFunc ipAddrToAsciiEngine ( const char * pName );
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virtual epicsShareFunc ~ipAddrToAsciiEngine ();
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virtual void run ();
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epicsShareFunc void show ( unsigned level ) const;
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private:
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epicsThread & thread;
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tsDLList < ipAddrToAsciiAsynchronous > labor;
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epicsEvent laborEvent;
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epicsEvent destructorBlockEvent;
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epicsEvent threadExit;
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epicsEvent cancelPendCompleted;
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ipAddrToAsciiAsynchronous * pCurrent;
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char nameTmp [1024];
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bool exitFlag;
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bool cancelPending;
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bool callbackInProgress;
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bool waitingForCancelPendCompletion;
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static epicsMutex mutex;
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ipAddrToAsciiEngine ( const ipAddrToAsciiEngine & );
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ipAddrToAsciiEngine & operator = ( const ipAddrToAsciiEngine & );
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friend class ipAddrToAsciiAsynchronous;
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};
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// - this class implements the asynchronous DNS query
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// - it completes early with the host name in dotted IP address form
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// if the ipAddrToAsciiEngine is destroyed before IO completion
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// or if there are too many items already in the engine's queue.
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//
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class ipAddrToAsciiAsynchronous :
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public tsDLNode < ipAddrToAsciiAsynchronous > {
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public:
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epicsShareFunc ipAddrToAsciiAsynchronous ( const osiSockAddr & addr );
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epicsShareFunc virtual ~ipAddrToAsciiAsynchronous ();
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epicsShareFunc void ioInitiate ( ipAddrToAsciiEngine & engine );
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epicsShareFunc bool identicalAddress ( const osiSockAddr & addr ) const;
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epicsShareFunc osiSockAddr address () const;
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epicsShareFunc void show ( unsigned level ) const;
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virtual void ioCompletionNotify ( const char * pHostName ) = 0;
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private:
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osiSockAddr addr;
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ipAddrToAsciiEngine * pEngine;
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friend class ipAddrToAsciiEngine;
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};
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inline osiSockAddr ipAddrToAsciiAsynchronous::address () const
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{
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return this->addr;
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}
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inline bool ipAddrToAsciiAsynchronous::identicalAddress ( const osiSockAddr &addrIn ) const
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{
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if ( this->addr.sa.sa_family == AF_INET && addrIn.sa.sa_family == AF_INET ) {
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return this->addr.ia.sin_addr.s_addr == addrIn.ia.sin_addr.s_addr &&
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this->addr.ia.sin_port == addrIn.ia.sin_port;
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}
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return false;
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}
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#endif // ifdef ipAddrToAsciiAsynchronous_h
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