ACC Programmer's Reference Guide

Chapter 4 241

ZCOM C I/F Library Routines

ZLUOPEN (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:

PARAMETERS

RETURN VALUE Routine zluopen ret urns 0 if successful. Otherwise, a non-zero error

code is returned. See /o pt/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 (checksum is not used). Node must be

zero or contain the local node as defined in the TTGEN

configuration file.

mode Open mode. Parameter is not used and should be

specified as zero.

(Return Param)

Returned file descriptor. If zluopen is returned with error,

this return parameter is undefined.