Ibm SC34-6814-04 Manual do Utilizador descarregar pdf (Página 460)

100

101

Data storage key for user-replaceable programs

The storage key of storage used by user-replaceable programs depends on how

the storage is obtained:

v The communication area passed to the user-replaceable program by its caller is

always in CICS key.

v Any working storage obtained for the user-replaceable program is in the key set

by the TASKDATAKEY of the transaction under which the program is invoked.

v User-replaceable programs can use EXEC CICS commands to obtain storage, by

issuing:

– Explicit EXEC CICS GETMAIN commands

– Implicit storage requests as a result of EXEC CICS commands that use the

SET option.

The default storage key for storage obtained by EXEC CICS commands is set by

the TASKDATAKEY of the transaction under which the user program is invoked.

As an example, consider a transaction defined with TASKDATAKEY(USER) that

causes a user-replaceable program to be invoked. In this case, any implicit or

explicit storage acquired by the user program by means of an EXEC CICS

command is, by default, in user-key storage. However, on an EXEC CICS

GETMAIN command, the user program can override the TASKDATAKEY option

by specifying either CICSDATAKEY or USERDATAKEY.

438 Customization Guide

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