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Programming Interface Information:
This information is NOT
intended to be
used as Programming Interfaces of VM/ESA. It is to be used for diagnosis only. |
BPQBK
Cross Reference (Contains links to field and bit definitions)
BPQBK Prolog
NAME : HCPBPQBK DESCRIPTION: BUFFER PENDING QUEUE BLOCK DSECT : BPQBK FUNCTION : DESCRIBES A QUEUE OF BUFFERS TO BE PROCESSED LOCATED BY : TSDBPQP IN THE TSDBK CREATED BY : HCPBMSSP - START A BPQBK DELETED BY : HCPBMSTP - TERMINATE A BPQBK
BPQBK Control Block Content
BPQBK DSECT
Hex Dec Type/Val Lng Label (dup) Comments ---- ---- --------- ---- -------------- -------- 0000 0 Structure BPQBK BUFFER PENDING QUEUE BLOCK 0000 0 Bitstring 1 BPQSTTYP FREE STORAGE INDICATOR 00000000 BPQFRE X'00' BPQBK IS FROM FREE STORAGE 00000001 BPQPAG X'01' BPQBK IS A REAL FRAME (PAGE) 0001 1 Bitstring 1 * RESERVED FOR FUTURE USE 0002 2 Signed 2 BPQDWSZ DOUBLE WORD SIZE OF BLOCK THIS FIELD IS ONLY USED WHEN THIS BLOCK IS CREATED FORM FREE STORAGE 0004 4 Signed 4 BPQPDBCT COUNT OF PENDING BUFFERS 0008 8 Address 4 BPQNXTOF POINTER TO FIRST BUFFER ON THE QUEUE (NEXT TO BE TAKEN OFF) 000C 12 Address 4 BPQNXTON POINTER TO NEXT AVAILABLE SLOT ON THE QUEUE (NEXT FILLED WHEN ADDING ON) 0010 16 Address 4 BPQLAST POINTER TO LAST FULLWORD OF QUEUE 00000003 BPQHSIZE (*-BPQBK+7)/8 SIZE OF THE HEADER PORTION OF BPQBK IN DOUBLEWORDS 0014 20 Address 4 BPQSTART (0) START OF PENDING BUFFERS
BPQBK Storage Layout
*** BPQBK - BUFFER PENDING QUEUE BLOCK * * +------+------+-------------+---------------------------+ * 0 |:STTYP|//////| BPQDWSZ | BPQPDBCT | * +------+------+-------------+---------------------------+ * 8 | BPQNXTOF | BPQNXTON | * +---------------------------+---------------------------+ * 10 | BPQLAST | | * +---------------------------+ | * 18 | | * = BPQSTART = * | | * +-------------------------------------------------------+ * *** BPQBK - BUFFER PENDING QUEUE BLOCK
BPQBK Cross Reference
(contains links to field and bit definitions)Symbol Dspl Value -------------- ---- -----BPQDWSZ 0002
BPQFRE 0000 00000000
BPQHSIZE 0010 00000003
BPQLAST 0010
BPQNXTOF 0008
BPQNXTON 000C
BPQPAG 0000 00000001
BPQPDBCT 0004
BPQSTART 0014
BPQSTTYP 0000
Last updated on 3 Aug 1999 at 11:43:13 EDT.
Copyright IBM Corporation, 1990, 1999