ACC Programmer's Reference Guide

Chapter 4 279
ZCOM C I/F Library Routines
ZSEND (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:
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).