NAME
SP_poll - checks amount of data ready to be read
SYNOPSIS
#include <sp.h>
int SP_poll( mailbox mbox);
DESCRIPTION
SP_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.
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
Yair Amir <[email protected]>
Jonathan Stanton <[email protected]>
Commedia Project <[email protected]>