128 lines
4.4 KiB
C
128 lines
4.4 KiB
C
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/* critical section guards szDatabaseName and fWait,
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/* fWait gaurds hf open and close
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/* logged modifications counter for database
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/**/
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typedef struct _atchchk
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{
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LGPOS lgposAttach;
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LGPOS lgposConsistent;
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SIGNATURE signDb;
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} ATCHCHK;
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typedef struct _rangelock
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{
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PGNO pgnoStart;
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PGNO pgnoEnd;
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struct _rangelock *prangelockNext;
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} RANGELOCK;
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typedef struct _fmp
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{
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HANDLE hf; /* file handle for read/write the file */
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CHAR *szDatabaseName; /* database file name */
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CRIT critExtendDB; /* critical section for file extension */
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ULONG ulFileSizeLow; /* database file size low DWORD */
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ULONG ulFileSizeHigh; /* database file size high DWORD */
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PIB *ppib; /* exclusive open session */
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union {
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UINT fFlags;
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struct {
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UINT fWait:1; /* Semaphore for entry being used */
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UINT fExtendingDB:1; /* Semaphore for extending DB file */
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UINT fCreate:1; /* Semaphore for creating DB */
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UINT fExclusive:1; /* DB Opened exclusively */
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UINT fReadOnly:1; /* ReadOnly database? */
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UINT fLogOn:1; /* logging enabled flag */
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UINT fVersioningOff:1; /* disable versioning flag */
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UINT fAttachNullDb:1; /* db is missing for attachment */
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UINT fAttached:1; /* DB is in attached state. */
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UINT fFakedAttach:1; /* faked attachement during recovery */
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#ifdef DEBUG
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UINT fFlush:1; /* DB is in flushing state. */
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#endif
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};
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};
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QWORD qwDBTimeCurrent; /* timestamp from DB redo operations */
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ERR errPatch; /* patch file write error */
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HANDLE hfPatch; /* file handle for patch file */
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CHAR *szPatchPath;
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INT cpage; /* patch page count */
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CRIT critCheckPatch;
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ULONG cPatchIO; /* active IO on patch file */
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PGNO pgnoMost; /* pgno of last database page */
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/* at backup begin */
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PGNO pgnoCopyMost; /* pgno of last page copied during */
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/* backup, 0 == no backup */
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RANGELOCK *prangelock;
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ATCHCHK *patchchk;
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ATCHCHK *patchchkRestored;
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DBFILEHDR *pdbfilehdr;
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} FMP;
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extern FMP *rgfmp;
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#define FFMPAttached( pfmp ) ( (pfmp)->fAttached )
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#define FMPSetAttached( pfmp ) ( (pfmp)->fAttached = 1 )
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#define FMPResetAttached( pfmp ) ( (pfmp)->fAttached = 0 )
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#define FDBIDWait( dbid ) ( rgfmp[dbid].fWait )
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#define DBIDSetWait( dbid ) ( rgfmp[dbid].fWait = 1 )
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#define DBIDResetWait( dbid ) ( rgfmp[dbid].fWait = 0 )
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#define FDBIDExclusive( dbid ) ( rgfmp[dbid].fExclusive )
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#define FDBIDExclusiveByAnotherSession( dbid, ppib ) \
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( ( FDBIDExclusive( dbid ) ) \
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&& ( rgfmp[dbid].ppib != ppib ) )
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#define FDBIDExclusiveBySession( dbid, ppib ) \
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( ( FDBIDExclusive( dbid ) ) \
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&& ( rgfmp[dbid].ppib == ppib ) )
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#define DBIDSetExclusive( dbid, ppib ) \
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rgfmp[dbid].fExclusive = 1; \
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rgfmp[dbid].ppib = ppib;
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#define DBIDResetExclusive( dbid ) ( rgfmp[dbid].fExclusive = 0 )
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#define FDBIDReadOnly( dbid ) ( rgfmp[dbid].fReadOnly )
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#define DBIDSetReadOnly( dbid ) ( rgfmp[dbid].fReadOnly = 1 )
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#define DBIDResetReadOnly( dbid ) ( rgfmp[dbid].fReadOnly = 0 )
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#define FDBIDAttachNullDb( dbid ) ( rgfmp[dbid].fAttachNullDb )
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#define DBIDSetAttachNullDb( dbid ) ( rgfmp[dbid].fAttachNullDb = 1 )
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#define DBIDResetAttachNullDb( dbid ) ( rgfmp[dbid].fAttachNullDb = 0 )
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#define FDBIDAttached( dbid ) ( rgfmp[dbid].fAttached )
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#define DBIDSetAttached( dbid ) ( rgfmp[dbid].fAttached = 1 )
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#define DBIDResetAttached( dbid ) ( rgfmp[dbid].fAttached = 0 )
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#define FDBIDExtendingDB( dbid ) ( rgfmp[dbid].fExtendingDB )
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#define DBIDSetExtendingDB( dbid ) ( rgfmp[dbid].fExtendingDB = 1 )
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#define DBIDResetExtendingDB( dbid) ( rgfmp[dbid].fExtendingDB = 0 )
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#define FDBIDFlush( dbid ) ( rgfmp[dbid].fFlush )
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#define DBIDSetFlush( dbid ) ( rgfmp[dbid].fFlush = 1 )
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#define DBIDResetFlush( dbid ) ( rgfmp[dbid].fFlush = 0 )
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#define FDBIDCreate( dbid ) ( rgfmp[dbid].fCreate )
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#define DBIDSetCreate( dbid ) ( rgfmp[dbid].fCreate = 1 )
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#define DBIDResetCreate( dbid ) ( rgfmp[dbid].fCreate = 0 )
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#define FDBIDLogOn( dbid ) ( rgfmp[dbid].fLogOn )
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#define DBIDSetLogOn( dbid ) ( rgfmp[dbid].fLogOn = 1 )
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#define DBIDResetLogOn( dbid ) ( rgfmp[dbid].fLogOn = 0 )
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#define FDBIDVersioningOff( dbid ) ( rgfmp[dbid].fVersioningOff )
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#define DBIDSetVersioningOff( dbid ) ( rgfmp[dbid].fVersioningOff = 1 )
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#define DBIDResetVersioningOff( dbid ) ( rgfmp[dbid].fVersioningOff = 0 )
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#define HfFMPOfDbid( dbid ) ( rgfmp[dbid].hf )
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