Provided by: libspread1-dev_3.17.4-3_amd64 bug

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 <yairamir@cnds.jhu.edu>
       Jonathan Stanton <jonathan@cnds.jhu.edu>
       Commedia Project <commedia@cnds.jhu.edu>

SEE ALSO

       libsp(3)