107 lines
3.1 KiB
C
107 lines
3.1 KiB
C
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//============== DAE: OS/2 Database Access Engine ===================
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//============== pib.h: Process Information Block ===================
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/* JET API flags
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/**/
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#define FPIBVersion( ppib ) (!((ppib)->grbit & (JET_bitCIMCommitted | JET_bitCIMDirty)))
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#define FPIBCommitted( ppib ) ((ppib)->grbit & JET_bitCIMCommitted)
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#define FPIBDirty( ppib ) ((ppib)->grbit & JET_bitCIMDirty)
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#define FPIBAggregateTransaction( ppib ) ((ppib)->grbit & JET_bitAggregateTransaction)
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//
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// Process Information Block
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//
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struct _pib
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{
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/* most used field has offset 0
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/**/
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TRX trx; // trx id
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BOOL fUserSession; // user session
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/* JET API fields
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/**/
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JET_SESID sesid; // JET session id
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JET_GRBIT grbit; // session flags
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struct _pib *ppibNext; // PIB list
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LEVEL level; // transaction level of this session
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struct _dab *pdabList; // list of open DAB's of this thread
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USHORT rgcdbOpen[dbidUserMax]; // counter for open databases
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struct _fucb *pfucb; // list of active fucb of this thread
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/* logging/recovery fields
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/**/
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PROCID procid; // thread id
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LGPOS lgposStart; // log time
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LEVEL levelStart; // transaction level when first begin transaction operation
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INT clgOpenT; // count of deferred open transactions
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SIG sigWaitLogFlush;
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LONG lWaitLogFlush;
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struct _pib *ppibNextWaitFlush;
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struct _pib *ppibPrevWaitFlush;
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LGPOS *plgposCommit;
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/* PIB flags
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/**/
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BOOL fAfterFirstBT:1; // for redo only
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BOOL fLogDisabled:1; // temporary turn off the logging
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BOOL fLGWaiting:1; // waiting for log to flush
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BOOL fDeferFreeNodeSpace:1; // session has deferred node free space
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/* version store fields
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/**/
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struct _bucket volatile *pbucket;
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struct _rc *prcLast; // last node of this proc's RC list
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INT ibOldestRCE;
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#ifdef WIN16
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struct _pha *phaUser; // pointer to User Handle Array
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#endif /* WIN16 */
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};
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#define PpibMEMAlloc() (PIB*)PbMEMAlloc(iresPIB)
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#ifdef DEBUG /* Debug check for illegal use of freed pib */
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#define MEMReleasePpib(ppib) { MEMRelease(iresPIB, (BYTE*)(ppib)); ppib = ppibNil; }
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#else
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#define MEMReleasePpib(ppib) { MEMRelease(iresPIB, (BYTE*)(ppib)); }
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#endif
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/* CheckPIB macro.
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/**/
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#ifdef WIN16
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#define CheckPIB(ppib) \
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{ \
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Assert( fRecovering || OffsetOf(ppib) == ppib->procid ); \
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rghfUser = ppib->phaUser->rghfDatabase; \
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hfLog = ppib->phaUser->hfLog; \
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}
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#else /* !WIN16 */
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#define CheckPIB(ppib) \
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Assert( ( fRecovering || OffsetOf(ppib) == ppib->procid ) && \
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(ppib)->level < levelMax )
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#endif /* !WIN16 */
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#define FPIBDeferFreeNodeSpace( ppib ) ( (ppib)->fDeferFreeNodeSpace )
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#define PIBSetDeferFreeNodeSpace( ppib ) ( (ppib)->fDeferFreeNodeSpace = fTrue )
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#define PIBResetDeferFreeNodeSpace( ppib ) ( (ppib)->fDeferFreeNodeSpace = fFalse )
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#define FPIBActive( ppib ) ( (ppib)->level != levelNil )
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#define SesidOfPib( ppib ) ( (ppib)->sesid )
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/* prototypes
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/**/
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ERR ErrPIBBeginSession( PIB **pppib );
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VOID PIBEndSession( PIB *ppib );
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#ifdef DEBUG
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VOID PIBPurge( VOID );
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#else
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#define PIBPurge()
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#endif
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