137 lines
2.5 KiB
C++
137 lines
2.5 KiB
C++
//
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// Example EPICS CA directory server
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//
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//
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// caServer
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// |
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// directoryServer
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//
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//
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//
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// ANSI C
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//
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#include <string.h>
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#include <stdio.h>
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//
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// EPICS
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//
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#define caNetAddrSock
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#include "casdef.h"
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#include "epicsAssert.h"
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#include "resourceLib.h"
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#ifndef NELEMENTS
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# define NELEMENTS(A) (sizeof(A)/sizeof(A[0]))
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#endif
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class directoryServer;
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//
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// pvInfo
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//
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class pvInfo {
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public:
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pvInfo (const char *pNameIn, sockaddr_in addrIn) :
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addr(addrIn), pNext(pvInfo::pFirst)
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{
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pvInfo::pFirst = this;
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this->pName = new char [strlen(pNameIn)+1u];
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assert(this->pName);
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strcpy(this->pName, pNameIn);
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}
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const struct sockaddr_in getAddr() const { return this->addr; }
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const char *getName () const { return this->pName; }
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const pvInfo *getNext () const { return this->pNext; }
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static const pvInfo *getFirst () { return pvInfo::pFirst; }
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private:
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struct sockaddr_in addr;
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char *pName;
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const pvInfo *pNext;
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static const pvInfo *pFirst;
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};
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//
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// pvEntry
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//
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// o entry in the string hash table for the pvInfo
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// o Since there may be aliases then we may end up
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// with several of this class all referencing
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// the same pv info class (justification
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// for this breaking out into a seperate class
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// from pvInfo)
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//
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class pvEntry : public stringId, public tsSLNode<pvEntry> {
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public:
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pvEntry (const pvInfo &infoIn, directoryServer &casIn,
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const char *pAliasName) :
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stringId(pAliasName), info(infoIn), cas(casIn)
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{
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assert(this->stringId::resourceName()!=NULL);
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}
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inline ~pvEntry();
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const pvInfo &getInfo() const { return this->info; }
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inline void destroy ();
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private:
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const pvInfo &info;
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directoryServer &cas;
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};
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//
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// directoryServer
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//
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class directoryServer : public caServer {
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public:
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directoryServer (const char * const pvPrefix, unsigned aliasCount);
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~directoryServer();
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void show (unsigned level) const;
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pvExistReturn pvExistTest (const casCtx&, const char *pPVName);
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void installAliasName (const pvInfo &info, const char *pAliasName);
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inline void removeAliasName(pvEntry &entry);
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private:
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resTable<pvEntry,stringId> stringResTbl;
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};
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//
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// directoryServer::removeAliasName()
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//
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inline void directoryServer::removeAliasName(pvEntry &entry)
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{
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pvEntry *pE;
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pE = this->stringResTbl.remove(entry);
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assert(pE = &entry);
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}
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//
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// pvEntry::~pvEntry()
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//
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inline pvEntry::~pvEntry()
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{
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this->cas.removeAliasName(*this);
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}
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//
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// pvEntry::destroy()
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//
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inline void pvEntry::destroy ()
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{
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//
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// always created with new
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//
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delete this;
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}
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