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Man Pages
SP_POLL(3) User Manuals SP_POLL(3)

SP_poll - checks amount of data ready to be read

#include <sp.h>
 
int SP_poll( mailbox mbox);

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.

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.

None.

Yair Amir <yairamir@cnds.jhu.edu>
 
Jonathan Stanton <jonathan@cnds.jhu.edu>
 

libspread(3)
JULY 1998 SPREAD

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