Memory fault in ql session

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LEARN ABOUT ULTRIX

pfm_cleanup

pfm_cleanup(3ncs) pfm_cleanup(3ncs)

Name
pfm_cleanup - establish a clean-up handler

Syntax
#include <idl/c/base.h>
#include <idl/c/pfm.h>

status_$t pfm_$cleanup(cleanup_record)
pfm_$cleanup_rec *cleanup_record;

Arguments
cleanup_record A record of the context when is called. A program should treat this as an opaque data structure and not try to alter
or copy its contents. It is needed by and to restore the context of the calling process at the clean-up handler entry
point.

Description
The routine establishes a clean-up handler that is executed when a fault occurs. A clean-up handler is a piece of code executed before a
program exits when a signal is received by the process. The clean-up handler begins where is called; the routine registers an entry point
with the system where program execution resumes when a fault occurs. When a fault occurs, execution resumes after the most recent call to

There can be more than one clean-up handler in a program. Multiple clean-up handlers are executed consecutively on a last-in/first-out
basis, starting with the most recently established handler and ending with the first clean-up handler. The system provides a default
clean-up handler established at program invocation. The default clean-up handler is always called last, just before a program exits, and
releases any system resources still held, before returning control to the process that invoked the program.

Diagnostics
When called to establish a clean-up handler, returns the status pfm_$cleanup_set to indicate the clean-up handler was successfully estab-
lished. When the clean-up handler is entered in response to a fault signal, effectively returns the value of the fault that triggered the
handler.

This section lists status codes for errors returned by this routine in

pfm_$bad_rls_order Attempted to release a clean-up handler out of order.

pfm_$cleanup_not_found
There is no pending clean-up handler.

pfm_$cleanup_set A clean-up handler was established successfully.

pfm_$cleanup_set_signaledl
Attempted to use pfm_$cleanup_set as a signal.

pfm_$invalid_cleanup_rec
Passed an invalid clean-up record to a routine.

pfm_$no_space Cannot allocate storage for a clean-up handler. Clean-up handler code runs with asynchronous faults inhibited. When
returns something other than pfm_$cleanup_set indicating that a fault has occurred, there are four possible ways to
leave the clean-up code:

o The program can call to start the next clean-up handler with a different fault signal.

o The program can call to start the next clean-up handler with the same fault signal.

o The program can continue with the code following the clean-up handler. It should generally call to reenable
asynchronous faults. Execution continues from the end of the clean-up handler code; it does not resume where
the fault signal was received.

o The program can reestablish the handler by calling before proceeding.

Files
See Also
intro(3ncs), pfm_signal(3ncs)

pfm_cleanup(3ncs)

UNIX for Advanced & Expert Users