ACC Programmer's Reference Guide

228 Chapter4
ZCOM C I/F Library Routines
ZLTMX (3X)
Threads
Considerations
This routine may be called from a multi-threaded application using the POSIX
(1003.1c) kernel threads API package.
This routine has the following
characteristics when called by a multi-threaded application
:
For a more detailed description of the multiplexing facilities available
under ZCOM, see the section of the manual under the heading “ZCOM
Message Handling”.
Routine zltmx returns 0 if successful. Otherwise, a non-zero error code
is returned. See /opt/acc/include/zcom/zcomsys.h for the list of ZCOM
error codes and their meanings.
cancellation point Thread cancellation can occur when a thread calls this
routine.
async-cancel unsafe The calling thread’s cancelability type must be
PTHREAD_CANCEL_DEFERRED if cancellation is
enabled.
async-signal unsafe It cannot be called from a signal handler.
fork unsafe It cannot be called by a child process after fork(2) but
before exec(2).
zap ZCOM address.
mode Multiplexing control mode
ZcENB_OUTB_MLTPLXG (1) - Enable outbound multiplexing
ZcENB_INB_MLTPLXG (2) - Enable inbound multiplexing
ZcDSB_OUTB_MLTPLXG (3) - Disable outbound multiplexing
ZcDSB_INB_MLTPLXG (4) - Disable inbound multiplexing