ACC Programmer's Reference Guide

148 Chapter4
ZCOM C I/F Library Routines
LTQDPUT (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
NOTES
Normally, the data queue number used s hould be allocated by ZMON
(see the man page for zltqueue on how to get a data queue number).
There is no queueownership validation within this routine; it is up to the
user to make sure that the queue usage is valid and consistent.
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 of the terminal ZLU to store data into.
queue Terminal data queue number (specifies which data queue
is to be used):
0 - Sub-packet holding queue (reserved)
1 - Data holding queue A
2 - Data holding queue B
3 - Data holding queue C
4 - Data holding queue D
ibuf Data buffer to be stored.
len Length in bytes of ibuf.