NAME¶
XPAPoll - execute existing XPA requests
SYNOPSIS¶
#include <xpa.h>
int XPAPoll(int msec, int maxreq);
DESCRIPTION¶
It is sometimes desirable to implement a polling loop, i.e., where one checks
for and processes XPA requests without blocking. For this situation, use the
XPAPoll() routine:
XPAPoll(int msec, int maxreq);
The
XPAPoll() routine will perform
XPAAddSelect() and
select(), but with a timeout specified in millisecs by the msec
argument. If one or more XPA requests are made before the timeout expires, the
XPAProcessSelect() routine is called to process those requests. The
maxreq value determines how many requests will be processed: if maxreq < 0,
then no events are processed, but instead, the return value indicates the
number of events that are pending. If maxreq == 0, then all currently pending
requests will be processed. Otherwise, up to maxreq requests will be
processed. (The most usual values for maxreq are 0 to process all requests and
1 to process one request).
SEE ALSO¶
See
xpa(7) for a list of XPA help pages