NAME : HCPDCHBK
DESCRIPTION: Diagnose Control Header
DSECT : DCHBK
FUNCTION : The Diagnose Control Header serializes use of the
diagnose control block locator array, as well as
locates the diagnose control block locator array.
LOCATED BY : SYSCM.SYSDCHBK
CREATED BY : HCPHVAIN
DELETED BY : None.
REFERENCES : None.
SERIALIZED : The DCHBK is created during system initialization;
no further serialization is required.
The DCHLOCK is obtained exclusive in order to
serialize additions to the array of addresses of
DGNBKs. Since an address in the array is never
deleted, there is no conflict between searching and
adding. Therefore, there is no need to obtain the
DCHLOCK for searching.
RELOCATION CONSIDERATIONS : None