147 lines
4 KiB
C
147 lines
4 KiB
C
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//============== DAE: OS/2 Database Access Engine ===================
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//============== daeconst.h: Global System Constants ===================
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#define cpgDatabaseMin 16
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#define cpgDatabaseMax (1UL << 19)
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#define pgnoSystemRoot ((PGNO) 1)
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#define itagSystemRoot 0
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#define szSystemDatabase "system.mdb"
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#define szTempDBFileName "temp.mdb"
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#define szTempFile "temp.tmp"
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/* number of pages of system root FDP primary extent */
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#define cpgSystemPrimary ((CPG) 1)
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/* initial temporary file allocation */
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#define cpgTempFile ((CPG) 1)
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/* discontinuity measurement unit
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/**/
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#define cpgDiscont 16
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/* default density
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/**/
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#define ulDefaultDensity 80 // 80% density
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#define ulFILEDensityLeast 20 // 20% density
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#define ulFILEDensityMost 100 // 100% density
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#define dbidTemp ((DBID) 0)
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#define dbidSystemDatabase ((DBID) 1)
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#define dbidUserMin ((DBID) 1)
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#define dbidMin ((DBID) 0)
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#define dbidUserMax ((DBID) 67)
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#define dbidMax dbidUserMax
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/* number of buffer hash table entries
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/* should be prime
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/**/
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#define ipbfMax 8191
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/* vertical split threshold
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/**/
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#define cbVSplitThreshold 400
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/* Engine OBJIDs:
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/*
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/* 0..0x10000000 reserved for engine use, divided as follows:
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/*
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/* 0x00000000..0x0000FFFF reserved for TBLIDs under RED
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/* 0x00000000..0x0EFFFFFF reserved for TBLIDs under BLUE
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/* 0x0F000000..0x0FFFFFFF reserved for container IDs
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/* 0x10000000 reserved for ObjectId of DbObject
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/*
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/* Client OBJIDs begin at 0x10000001 and go up from there.
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/**/
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#define objidNil ((OBJID) 0x00000000)
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#define objidRoot ((OBJID) 0x0F000000)
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#define objidTblContainer ((OBJID) 0x0F000001)
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#define objidDbContainer ((OBJID) 0x0F000002)
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#define objidRcContainer ((OBJID) 0x0F000003)
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#define objidDbObject ((OBJID) 0x10000000)
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/* Magic number used in database root node for integrity checking
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/**/
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#define ulDAEMagic 0x89abcdef
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#define ulDAEVersion 0x00000001
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#define ulDAEPrevVersion 0x00000000
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#define szVerbose "BLUEVERBOSE"
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#define szNull ""
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/* transaction level limits.
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/**/
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#define levelMax ((LEVEL)10) // all level < 10
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#define levelMost ((LEVEL)9) // max for engine
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#define levelUserMost ((LEVEL)7) // max for user
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#define levelMin ((LEVEL)0)
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/* Start and max waiting period for WaitTillOldest
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/**/
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#define ulStartTimeOutPeriod 20
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#define ulMaxTimeOutPeriod 60000
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/* default resource allocation
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/**/
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#define cDBOpenDefault 100
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#define cbucketLowerThreshold 8
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#define cbufThresholdLowDefault 20
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#define cbufThresholdHighDefault 80
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#define cpibDefault 10
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#define cbgcbDefault 4
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#define cfucbDefault 300
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#define cfcbDefault 300
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#define cscbDefault 20
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#define cidbDefault cfcbDefault
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#define cbufDefault 500
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#define clgsecBufDefault 21
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#define clgsecGenDefault 250
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#define clgsecFTHDefault 10
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#define cbucketDefault 64
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#define lWaitLogFlushDefault 15
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#define lLogFlushPeriodDefault 45
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#define lLGCheckpointPeriodDefault 10
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//#define lLGCheckpointPeriodDefault 100
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#define lLGWaitingUserMaxDefault 3
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#define lPageFragmentDefault 8
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#define cdabDefault 100
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#define lBufLRUKCorrelationIntervalDefault 0
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#define lBufBatchIOMaxDefault 64
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#define lPageReadAheadMaxDefault 4
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#define lAsynchIOMaxDefault 64
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/* resource relationships for derived resources
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/**/
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#define lCSRPerFUCB 2
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/* system resource requirements
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/**/
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#define cpibSystem 3
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#define cbucketSystem 2
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/* vertical split minimum in non-FDP page.
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/**/
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#define cbVSplitMin 100
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/* code page constants.
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/**/
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#define usUniCodePage 1200 /* code page for Unicode strings */
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#define usEnglishCodePage 1252 /* code page for English */
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/* length of modified page list
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/**/
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#define cmpeMax 8192
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/* idle processing constants
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/**/
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#define icallIdleBMCleanMax cmpeMax
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/* wait time for latch/crit conflicts
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/**/
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#define cmsecWaitGeneric 100
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#define cmsecWaitWriteLatch 10
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#define cmsecWaitLogFlush 1
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