75 lines
1.7 KiB
Factor
Executable File
75 lines
1.7 KiB
Factor
Executable File
! Copyright (C) 2004, 2008 Slava Pestov.
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! See http://factorcode.org/license.txt for BSD license.
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USING: accessors assocs kernel math namespaces sequences system
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kernel.private byte-arrays arrays ;
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IN: alien
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! Some predicate classes used by the compiler for optimization
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! purposes
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PREDICATE: simple-alien < alien underlying>> not ;
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UNION: simple-c-ptr
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simple-alien POSTPONE: f byte-array ;
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DEFER: pinned-c-ptr?
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PREDICATE: pinned-alien < alien underlying>> pinned-c-ptr? ;
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UNION: pinned-c-ptr
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pinned-alien POSTPONE: f ;
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GENERIC: expired? ( c-ptr -- ? ) flushable
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M: alien expired? expired>> ;
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M: f expired? drop t ;
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: <alien> ( address -- alien )
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f <displaced-alien> { simple-c-ptr } declare ; inline
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: <bad-alien> ( -- alien )
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-1 <alien> t >>expired ; inline
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M: alien equal?
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over alien? [
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2dup [ expired? ] either? [
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[ expired? ] both?
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] [
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[ alien-address ] bi@ =
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] if
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] [
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2drop f
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] if ;
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SYMBOL: libraries
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libraries global [ H{ } assoc-like ] change-at
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TUPLE: library path abi dll ;
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: library ( name -- library ) libraries get at ;
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: <library> ( path abi -- library )
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over dup [ dlopen ] when \ library boa ;
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: load-library ( name -- dll )
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library dup [ library-dll ] when ;
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: add-library ( name path abi -- )
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<library> swap libraries get set-at ;
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ERROR: alien-callback-error ;
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: alien-callback ( return parameters abi quot -- alien )
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alien-callback-error ;
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ERROR: alien-indirect-error ;
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: alien-indirect ( ... funcptr return parameters abi -- )
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alien-indirect-error ;
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ERROR: alien-invoke-error library symbol ;
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: alien-invoke ( ... return library function parameters -- ... )
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2over alien-invoke-error ;
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