79 lines
2.2 KiB
Factor
79 lines
2.2 KiB
Factor
! Copyright (C) 2008 Slava Pestov.
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! See http://factorcode.org/license.txt for BSD license.
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USING: accessors alien.c-types alien.data combinators
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destructors io.backend.unix libc kernel math.bitwise sequences
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specialized-arrays unix unix.kqueue unix.time assocs
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io.backend.unix.multiplexers classes.struct literals ;
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SPECIALIZED-ARRAY: kevent
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IN: io.backend.unix.multiplexers.kqueue
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TUPLE: kqueue-mx < mx events ;
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! We read up to 256 events at a time. This is an arbitrary
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! constant...
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CONSTANT: max-events 256
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: <kqueue-mx> ( -- mx )
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kqueue-mx new-mx
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kqueue dup io-error >>fd
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max-events \ kevent <c-array> >>events ;
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M: kqueue-mx dispose* fd>> close-file ;
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: make-kevent ( fd filter flags -- event )
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\ kevent <struct>
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swap >>flags
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swap >>filter
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swap >>ident ;
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: register-kevent ( kevent mx -- )
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fd>> swap 1 f 0 f kevent-func io-error ;
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M: kqueue-mx add-input-callback ( thread fd mx -- )
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[ call-next-method ] [
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[ EVFILT_READ flags{ EV_ADD EV_ONESHOT } make-kevent ] dip
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register-kevent
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] 2bi ;
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M: kqueue-mx add-output-callback ( thread fd mx -- )
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[ call-next-method ] [
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[ EVFILT_WRITE flags{ EV_ADD EV_ONESHOT } make-kevent ] dip
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register-kevent
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] 2bi ;
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M: kqueue-mx remove-input-callbacks ( fd mx -- seq )
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2dup reads>> key? [
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[ call-next-method ] [
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[ EVFILT_READ EV_DELETE make-kevent ] dip
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register-kevent
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] 2bi
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] [ 2drop f ] if ;
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M: kqueue-mx remove-output-callbacks ( fd mx -- seq )
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2dup writes>> key? [
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[
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[ EVFILT_WRITE EV_DELETE make-kevent ] dip
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register-kevent
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] [ call-next-method ] 2bi
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] [ 2drop f ] if ;
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: wait-kevent ( mx timespec -- n )
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[
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[ fd>> f 0 ]
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[ events>> dup length ] bi
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] dip kevent-func multiplexer-error ;
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: handle-kevent ( mx kevent -- )
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[ ident>> swap ] [ filter>> ] bi {
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{ EVFILT_READ [ input-available ] }
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{ EVFILT_WRITE [ output-available ] }
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} case ;
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: handle-kevents ( mx n -- )
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[ dup events>> ] dip head-slice
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[ handle-kevent ] with each ;
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M: kqueue-mx wait-for-events ( nanos mx -- )
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swap dup [ make-timespec ] when
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dupd wait-kevent handle-kevents ;
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