ECA - Event control area

      CONTROL BLOCK NAME = DFHECAPS
      DESCRIPTIVE NAME = CICS TS Event Control Area
           Licensed Materials - Property of IBM
            Restricted Materials of IBM 
           5655-Y04
           (C) Copyright IBM Corp. 1990 
      FUNCTION =
       The Event Control Area is used by interval control (DFHICP).
       The ECA is obtained for a POST type ICE.
       It contains the ECB. The ECA's are getmained from a
       subpool called APECA which resides below the line and has
       USER access. The ICETECAA field will contain the address
       of the ECA associated with an ICE. If there is no ECA for the
       ICE then ICETECAA is zero. Inline DFHSMGFI calls are made
       to get and free ECAs.
      LIFETIME =
       The control block is created with a POST type ICE.
       The ECA is freed when the assoiated ICE is freed.
      STORAGE CLASS =
       The storage class is APECA.
      LOCATION =
       To locate an ECA use the ICETECAA field which contains the
       address of the ECA associated with the ICE. If the ICETECAA
       field equals zero then there is no ECA.
      INNER CONTROL BLOCKS = none
      NOTES :
       DEPENDENCIES = none
       RESTRICTIONS =
       MODULE TYPE = Control block definition
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      EXTERNAL REFERENCES = none
        DATA AREAS = none
        CONTROL BLOCKS = none
        GLOBAL VARIABLES (Macro pass) = none
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Constants