SSP_POLL

Section: User Manuals (3)
Updated: JULY 2001

NAME

SSP_poll - checks amount of data ready to be read

SYNOPSIS

#include <ssp.h>
int SSP_poll(mailbox mbox);

DESCRIPTION

SSP_poll is a way to poll a mailbox to see if any messages are available for receiving. The value returned will be < 0 if error, 0 if nothing is available, and the number of bytes waiting if something is there. Note that although SSP_poll indicates that there are bytes available, SSP_receive will block because the data on the file descriptor is used by Flush and is not intended for the user.

RETURN VALUES

Returns 0 if nothing is available or the number of bytes available, or one of the following errors ( < 0 ):

ILLEGAL_SESSION: The session specified by mbox is illegal. Usually because it is not active.

BUGS

None.

AUTHOR

Cristina Nita-Rotaru <crisn@cnds.jhu.edu>

This document was created by man2html, using the manual pages.
Time: 22:01:40 GMT, July 06, 2001

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