QDGBL | Back to Index page |
Prolog Control Block Contents QDGBL DSECT Storage Layout Cross Reference (Contains links to field and bit definitions) |
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QDGBL Prolog | Top of page |
NAME : Virtual Disk in Storage Global Control Block DESCRIPTION: V-Disk Global Control Block DSECT : QDGBL FUNCTION : This control block maps the global V-Disk control block for the system. LOCATED BY : HCPSYSCM - System Common Area CREATED BY : HCPQDLIN DELETED BY : none SERIALIZED : QDGALOCK is used to serialize the QDGBL control block fields. QDGCLOCK is used to serialize the VDISK MDISK chain (located by QDGMDISK). Either QDGALOCK or QDGCLOCK should be held shared when looking at the VDISK MDISK chain. Both must be held exclusive when changing the VDISK MDISK chain. RELOCATION CONSIDERATIONS : None |
QDGBL Control Block Content | Top of page |
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QDGBL Storage Layout | Top of page |
*** QDGBL - V-Disk Global Control Block * * +-------------------------------------------------------+ * 0 | | * = QDGALOCK = * | | * +-------------------------------------------------------+ * 18 | | * = QDGCLOCK = * | | * +---------------------------+---------------------------+ * 30 | QDGMDISK | QDGSYSLM | * +---------------------------+---------------------------+ * 38 | QDGUSRLM | QDGSYSCA | * +---------------------------+-------------+-------------+ * 40 | QDGRELOC |/////////////| QDGCOUNT | * +---------------------------+-------------+-------------+ * 48 | QDGLKCNT | QDGDISKS | * +---------------------------+---------------------------+ * 50 | QDGSYSLD | QDGUSRLD | * +------+--------------------+---------------------------+ * 58 |:AFLAG|////////////////////| 5C * +------+--------------------+ * *** QDGBL - V-Disk Global Control Block |
QDGBL Cross Reference | Top of page |
Symbol Dspl Value -------------- ---- ----- QDGAFLAG 0058 QDGALOCK 0000 QDGASYSC 0058 80 QDGCLOCK 0018 QDGCOUNT 0046 QDGDISKS 004C QDGLKCNT 0048 QDGMDISK 0030 QDGRELOC 0040 QDGSIZE 0059 0000000C QDGSYSCA 003C QDGSYSLD 0050 QDGSYSLM 0034 QDGUSRLD 0054 QDGUSRLM 0038 |
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