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# POLL.H -- FPOLL definitions (poll a set of file descriptors).
define MAX_POLL_FD 32 # max number of polling fds
define MPFD MAX_POLL_FD # utility shorthand
define LEN_FPOLL (4+(3*MPFD)) # length of polling structure
define INFTIM -1 # poll will block until event
# Structure of file descriptor/event pairs supplied in the poll arrays. The
# array elements are zero-indexed.
define POLL_NFD Memi[$1] # no. of file descriptors to poll
define POLL_FD Memi[$1+1+(0*MPFD)+$2] # file descriptor array
define POLL_EVENTS Memi[$1+1+(1*MPFD)+$2] # events of interest on fd
define POLL_REVENTS Memi[$1+1+(2*MPFD)+$2] # (return) events on fd
# Testable select events.
define POLLIN 001B # fd is readable
define POLLPRI 002B # priority info at fd
define POLLOUT 004B # fd is writeable (won't block)
# Non-testable poll events (may not be specified in events field,
# but may be returned in revents field).
define POLLERR 010B # fd has error condition
define POLLHUP 020B # fd has been hung up on
define POLLNVAL 040B # invalid pollfd entry
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