Re: Number of objects in a library

The fastest way to get context count is specify MATCTX receiver length 8,
then subtract 96 from bytes needed, then divide by 32.  The number you
observe from associated space offsets is the library count, not the context
count.  The following code shows the difference.  On my machine this shows
QSYS context count 14277 and QSYS library count 14053.  This code runs
under 1/1000 second.  Fast enough?

DCL SYSPTR ?LIBRARY     AUTO INIT("QSYS", TYPE(CTX));
DCL SPCPTR ?OIR         BAS(?LIBRARY) POS(H"21");
DCL DD     RECEIVER     AUTO CHAR(128) BDRY(16);
DCL DD     AVAILABLE    DEF(RECEIVER) POS(1) BIN(4);
DCL DD     NEEDED       DEF(RECEIVER) POS(5) BIN(4);
DCL DD     INSERTS      DEF(RECEIVER) POS(102) BIN(4);
DCL DD     REMOVES      DEF(RECEIVER) POS(106) BIN(4);
DCL SPCPTR ?RECEIVER    AUTO INIT(RECEIVER);
DCL DD     CTX_TOTAL    AUTO BIN(4);
DCL DD     LIB_TOTAL    AUTO BIN(4);

/* calculate number of objects in context */

CPYNV      AVAILABLE, 8;
MATCTX     ?RECEIVER, ?LIBRARY, X"0500000000";
SUBN       CTX_TOTAL, NEEDED, 96;
DIV(S)     CTX_TOTAL, 32;

/* calculate number of objects in library */

SETSPPFP   ?LIBRARY, ?LIBRARY;
CPYNV      AVAILABLE, 128;
MATINXAT   ?RECEIVER, ?OIR;
SUBN       LIB_TOTAL, INSERTS, REMOVES;

/* compare CTX_TOTAL with LIB_TOTAL in debugger */

BRK        "LOOK";
PEND;


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