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Programming Interface Information:
This page documents intended Programming
Interfaces that allow the customer to write programs to obtain the services of VM/ESA. |
SHVBLOCK
Cross Reference (Contains links to field and bit definitions)
SHVBLOCK Prolog
Name : SHVBLOCK Description: Control BLocks for accessing shared variables DSECT : SHVBLOCK Function : Defines the CMS EXECCOMM Shared Variable Block Structure and some common declares for use.
SHVBLOCK Control Block Content
SHVBLOCK DSECT
Hex Dec Type/Val Lng Label (dup) Comments ---- ---- --------- ---- -------------- -------- 0000 0 Structure SHVBLOCK Control BLocks for accessing shared variables 0000 0 Address 4 SHVNEXT (+0) CHAIN POINTER (0 IF LAST) 0004 4 Address 4 SHVUSER (+4) NOT USED, AVAILABLE FOR PRIVATE use EXCEPT DURING 'FETCH NEXT' 0008 8 Character 1 SHVCODE (+8) INDIVIDUAL FUNCTION CODE 0009 9 Bitstring 1 SHVRET (+9) INDIVIDUAL RETURN CODE FLAG 000A 10 Signed 2 * RESERVED, SHOULD BE ZERO 000C 12 Signed 4 SHVBUFL (+12) LENGTH OF 'FETCH' VALUE BUFFER 0010 16 Address 4 SHVNAMA (+16) ADDR OF PUBLIC VARIABLE NAME 0014 20 Signed 4 SHVNAML (+20) LENGTH OF PUBLIC VARIABLE NAME 0018 24 Address 4 SHVVALA (+24) ADDR OF VALUE BUFFER (0 IF NONE) 001C 28 Signed 4 SHVVALL (+28) LENGTH OF VALUE (SET BY 'FETCH') 00000020 SHVBLEN *-SHVBLOCK (LENGTH OF THIS BLOCK = 32) FUNCTION CODES (SHVCODE): 000000C6 SHVFETCH C'F' COPY VALUE OF SHARED VAR TO BUFFER 000000E2 SHVSTORE C'S' STORE GIVEN VALUE IN SHARED VARIABLE The following function codes only apply to the System Product Interpreter. (Note that the symbolic name codes are lowercase) 000000C4 SHVDROPV C'D' DROP VARIABLE 1... .11. SHVSYFET X'86' =C'f' SYMBOLIC NAME FETCH VARIABLE 1.1. ..1. SHVSYSET X'A2' =C's' SYMBOLIC NAME SET VARIABLE 1... .1.. SHVSYDRO X'84' =C'd' SYMBOLIC NAME DROP VARIABLE 000000D5 SHVNEXTV C'N' FETCH 'NEXT' VARIABLE 000000D7 SHVPRIV C'P' FETCH PRIVATE INFORMATION RETURN CODE FLAGS (SHVRET): .... .... SHVCLEAN X'00' EXECUTION WAS OK .... ...1 SHVNEWV X'01' VARIABLE DID NOT EXIST (SP interpreter only) .... ..1. SHVLVAR X'02' LAST VARIABLE TRANSFERRED (FOR N) .... .1.. SHVTRUNC X'04' TRUNCATION OCCURRED FOR 'FETCH' .... 1... SHVBADN X'08' INVALID VARIABLE NAME ...1 .... SHVBADV X'10' INVALID VARIABLE VALUE, e.g. too long (EXEC 2 ONLY). 1... .... SHVBADF X'80' INVALID FUNCTION CODE (SHVCODE)
SHVBLOCK Storage Layout
*** SHVBLOCK - Control BLocks for accessing shared variables * * +---------------------------+---------------------------+ * 0 | SHVNEXT | SHVUSER | * +------+------+-------------+---------------------------+ * 8 |:CODE |SHVRET|/////////////| SHVBUFL | * +------+------+-------------+---------------------------+ * 10 | SHVNAMA | SHVNAML | * +---------------------------+---------------------------+ * 18 | SHVVALA | SHVVALL | * +---------------------------+---------------------------+ * 20 * *** SHVBLOCK - Control BLocks for accessing shared variables
SHVBLOCK Cross Reference
(contains links to field and bit definitions)Symbol Dspl Value -------------- ---- -----SHVBADF 001C 80
SHVBADN 001C 08
SHVBADV 001C 10
SHVBLEN 001C 00000020
SHVBUFL 000C
SHVCLEAN 001C 00
SHVCODE 0008
SHVDROPV 001C 000000C4
SHVFETCH 001C 000000C6
SHVLVAR 001C 02
SHVNAMA 0010
SHVNAML 0014
SHVNEWV 001C 01
SHVNEXT 0000
SHVNEXTV 001C 000000D5
SHVPRIV 001C 000000D7
SHVRET 0009
SHVSTORE 001C 000000E2
SHVSYDRO 001C 84
SHVSYFET 001C 86
SHVSYSET 001C A2
SHVTRUNC 001C 04
SHVUSER 0004
SHVVALA 0018
SHVVALL 001C
Last updated on 12 Aug 1999 at 11:26:06 EDT.
Copyright IBM Corporation, 1990, 1999