Programming Interface Information:
This information is NOT intended to be used as Programming Interfaces of z/VM. |
AMTW
Control Block Contents
AMTW DSECT
Cross Reference (Contains links to field and bit definitions)
AMTW Prolog
NAME : HCPAMTW DESCRIPTION: Asynchronous Message Task Work Request DSECT : AMTW FUNCTION : Work element request for asynchronous message read task. LOCATED BY : Pointer (RDEVAMTQ) in the Real Device Block CREATED BY : Any asynchronous message requester HCPAMTRQ - Asynchronous Message Task Interface DELETED BY : HCPAMR - Message Read Task
AMTW Control Block Content
AMTW DSECT
Hex Dec Type/Val Lng Label (dup) Comments ---- ---- --------- ---- -------------- -------- 0000 0 Structure AMTW Asynchronous Message Task Work Request 0000 0 Address 4 * Reserved for Gated Queue Manager for use as a queue chain pointer 0004 4 Bitstring 1 AMTWREQ Defines the work to be performed 00000080 AMTWREAD X'80' Read request 00000040 AMTWNTFY X'40' Notify request 00000020 AMTWRQSC X'20' Requeue request if a state change pending condition occurs 00000010 AMTWCANC X'10' Cancel request 0005 5 Bitstring 1 AMTWDRMD Defines the disposition of message 00000080 AMTWPEND X'80' Call reflection if pending response 00000040 AMTWRNOM X'40' Call reflection if no-message message 00000020 AMTWRTNM X'20' Return a no-msg msg with the furnished msgid 00000010 AMTWIGNE X'10' Ignore error - will discard IOCM 0006 6 Bitstring 1 AMTWAMSK Attention presented path mask 0007 7 Bitstring 1 * Reserved 0008 8 Signed 4 AMTWMGID Message ID for a Read-specific request 000C 12 Address 4 AMTWRDEV RDEV Address 0010 16 Address 4 AMTWVDEV VDEV Address 0014 20 Address 4 AMTWPOST Pointer to CPEBK which represents a task waiting to be notified that the processing for this work request has been completed 00000003 AMTWSIZE ((*-AMTW)+7)/8 AMTW size in double-words
AMTW Storage Layout
*** AMTW - Asynchronous Message Task Work Request * * +---------------------------+------+------+------+------+ * 0 |///////////////////////////|:WREQ |:WDRMD|:WAMSK|//////| * +---------------------------+------+------+------+------+ * 8 | AMTWMGID | AMTWRDEV | * +---------------------------+---------------------------+ * 10 | AMTWVDEV | AMTWPOST | * +---------------------------+---------------------------+ * 18 * *** AMTW - Asynchronous Message Task Work Request
AMTW Cross Reference
Symbol Dspl Value -------------- ---- ----- AMTWAMSK 0006 AMTWCANC 0004 00000010 AMTWDRMD 0005 AMTWIGNE 0005 00000010 AMTWMGID 0008 AMTWNTFY 0004 00000040 AMTWPEND 0005 00000080 AMTWPOST 0014 AMTWRDEV 000C AMTWREAD 0004 00000080 AMTWREQ 0004 AMTWRNOM 0005 00000040 AMTWRQSC 0004 00000020 AMTWRTNM 0005 00000020 AMTWSIZE 0014 00000003 AMTWVDEV 0010
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