The problem is that the physical writes to the output streams
are deferred, and you don't have full control about the flushing of
the buffers, at least it does not work in the way we expect it.
This is no problem of the legacy data sets; it's only a problem of
the two RTLs, both writing to SYSPRINT (for example) and both
doing their own buffering. When we moved all the C printf work
to PL/1-PUT in the past (by our own printf replacement), all worked
well, of course.
The problem is not that important; we separated the trace output
to different DD-Names (PL/1: DRTRACE, C: CEEMSGS), and
we don't need to correlate the trace output ... in fact, there are not that
many calls when we cross borders (PL/1 to C and back), but large
time frames, when we stay within one language ("normal" business
logic in PL/1, insurance math service routines in C).
Other important features: the trace output can dynamically be activated
from outside (job control) on a per module base; different trace levels
are supported. No recompile needed. Activating traces is possible
even in production environment. This turned out to be very important
and helpful in error diagnosis.
Kind regards
Bernd
Am 03.04.2014 23:21, schrieb Paul Gilmartin:
On Thu, 3 Apr 2014 23:05:28 +0200, Bernd Oppolzer wrote:
But: we still have the problem, that the trace output from PL/1-PUT
and C printf are not in sync ... that is: due to different buffering in
the PL/1 and C RTL, the trace output does not appear in the correct time
order.
Don't know about legacy data sets; don't know about PL/[1I], but if I
use UNIX files and sprintf(); write(); I expect more orderly results.
fflush(); might also help.
setvbuf( stream, NULL, _IOLBF, ... ); might likewise help.
-- gil
----------------------------------------------------------------------
For IBM-MAIN subscribe / signoff / archive access instructions,
send email to [email protected] with the message: INFO IBM-MAIN
----------------------------------------------------------------------
For IBM-MAIN subscribe / signoff / archive access instructions,
send email to [email protected] with the message: INFO IBM-MAIN
