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CSRPDAC — Deactivate an extent z/OS MVS Programming: Assembler Services Reference ABE-HSP SA23-1369-00 |
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DescriptionCall the CSRPDAC cell pool service to deactivate a specific extent. Use this service to prepare the cell pool for contraction. You must specify which extent you want to deactivate. EnvironmentThe requirements for the caller are:
Programming requirementsIf your program is in AR mode, issue the SYSSTATE macro with ASCENV=AR before you call CSRPDAC so the CALL macro can generate the correct code for AR mode. Before you use cell pool services, you can optionally include the
CSRCPASM macro to generate cell pool services equate (EQU) statements.
CSRCPASM provides the following constants for use in your program:
RestrictionsAfter calling CSRPDAC, you can still free (or return) cells, but you cannot get (or allocate) any others for this extent. Input register informationBefore calling the CSRPDAC service, the caller does not have to place any information into any register unless using it in register notation for a particular parameter, or using it as a base register. Output register informationWhen control returns to the caller, the general purpose registers
(GPRs) contain:
When control returns to the caller, the access registers (ARs)
contain:
Some callers depend on register contents remaining the same before and after issuing a service. If the system changes the contents of registers on which the caller depends, the caller must save them before issuing the service, and restore them after the system returns control. Performance implicationsNone. SyntaxWrite the call as shown on the syntax diagram. You must code all parameters on the CALL statement in the order shown.
ParametersAll input to callable services is in the form of RX-type addresses. The parameters are explained as follows:
ABEND codesNone. Return and reason codesWhen the CSRPDAC service returns control to your program, GPR 15 (and return_code) contains one of the following return codes:
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Copyright IBM Corporation 1990, 2014
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