Execute existing \s-1xpa\s0 requests
#include <xpa.h> int XPAPoll(int msec, int maxreq);
It is sometimes desirable to implement a polling loop, i.e., where one checks for and processes \s-1XPA\s0 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 \s-1XPA\s0 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 xpa(7) for a list of \s-1XPA\s0 help pages