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Using the DSECTs z/OS Communications Server: SNA Programming SC27-3674-00 |
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Having used the DSECT-creating macroinstructions to define one or more control-block maps, the program can obtain storage for a control block from an assembled pool or dynamically from the system. The address of this storage should be placed in a register and specified in a USING statement before setting or testing values using the statements generated by the macroinstruction. For example, suppose the address of an RPL is in register 5 and that, after a request containing data has been received, it is necessary to determine the value of the RECLEN field of the RPL. If IFGRPL AM=VTAM is coded, the statement:
allows assembler language instructions to refer to the label RPLRLEN to obtain the record length. Further information is in the introductory section of Control block formats and DSECTs. |
Copyright IBM Corporation 1990, 2014
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