Spooler Programmer's Guide

Using the Spooler Interface Procedures
Spooler Programmer’s Guide—522287-002
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Spooling—Level 3
! error --this procedure handles I/O errors. It performs the
! necessary steps for recovery or it aborts the program.
! sperror --this procedure handles spooler errors. It performs the
! necessary steps for recovery or it aborts the program. It has
! a single INT value parameter that is the error code returned
! from the spooler interface procedures.
! getline --this procedure returns a line of data for spooling.
! It is an INT procedure that returns a zero (FALSE) value when
! it has no data to spool. It has two parameters: line and
! length. line is a reference to a 40-word (80-byte) array.
! The array is filled with the line of data to be spooled.
! length is a reference to an INT that is set to the number of
! bytes to be written from line.
! root --this is the main procedure. It performs all the file
! management to the collector and calls the other procedures in
! the program as needed.
?nolist
INT counter := 0;
?SOURCE $SYSTEM.SYSTEM.EXTDECS(OPEN, CLOSE, WRITE, STOP, ?SPOOLSTART,
SPOOLWRITE, SPOOLEND,CHECKOPEN, CHECKPOINT)
PROC cherror (george);
INT george;
BEGIN
CALL STOP;
END;
PROC stbackup;
BEGIN
counter := counter;
END;
PROC error;
BEGIN
CALL STOP;
END;
PROC sperror (errnum);
INT errnum;
BEGIN
CALL STOP;
END;
INT PROC getline( line, length);
INT .line,
.length;
BEGIN
INT temp, done;
temp :=0;
temp := counter.<13:15> ;
temp := temp * 5;
line [0] ':=' " ";
line [1] ':=' line[0] for 39;
line [temp] ':=' "0123456789";
length := 80;
IF counter > 120 THEN done := 0 ELSE done := 1;
counter := counter + 1;
RETURN done;
END;
Example 2-7. Annotated Example of Level-3 Spooling From a NonStop Process
Pair With a Zero Sync Depth
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