DPSB call
The Deallocate PSB (DPSB) call frees a PSB that was allocated with the APSB call.
Format
>>-DPSB--aib---------------------------------------------------><
| Call Name | DB/DC | DBCTL | DCCTL | DB Batch | TM Batch |
|---|---|---|---|---|---|
| DPSB | X | X |
Parameters
- aib
- Specifies the application interface block (AIB) that is used for
the call. This parameter is an input and output parameter. The following fields must be initialized in the AIB:
- AIBID
- Eye catcher. This 8-byte field must contain DFSAIBbb.
- AIBLEN
- AIB lengths. This field must contain the actual length of the AIB that the application program obtained.
- AIBRSNM1
- Resource name. This 8-byte, left-justified field must contain the PSB name.
Usage
The DPSB call must be used in a CPI Communications driven application program to release a PSB after a commit point occurs and before another PSB can be allocated. In a CPI Communications driven application program, the commit point is achieved with the COMMIT verb. For more information on CPI Communications driven application programs, see the topic "CPI-C Driven Application Programs" in IMS Version 13 Communications and Connections.
Restrictions
You can issue the DPSB call only after a commit point occurs, and it is valid only after a successful APSB call.