DFSMMUDT

DFSMMUDT (in source module DFSMMUD0) is a CSECT within the DL/I space management load module DFSDHDS0. Given an input block number, it locates the bit in the bitmap that corresponds to that block, and turns it on or off based on what the invoker of the routine requests.

Hints

For performance considerations for CSECT DFSMMUDT, please refer to module DFSDHDS0.

Reference Sources

More information is available in the IMS DBSOURCE Library Data Set. See your IMS systems programmer.