1 ! Copyright (C) 2004, 2010 Slava Pestov.
2 ! See http://factorcode.org/license.txt for BSD license.
3 USING: accessors byte-arrays byte-vectors continuations.private
4 init kernel kernel.private math namespaces sequences ;
7 BUILTIN: alien { underlying c-ptr read-only initial: f } expired ;
8 BUILTIN: dll { path byte-array read-only initial: B{ } } ;
10 PREDICATE: pinned-alien < alien underlying>> not ;
12 UNION: pinned-c-ptr pinned-alien POSTPONE: f ;
14 GENERIC: element-size ( seq -- n ) flushable
16 M: byte-array element-size drop 1 ; inline
18 M: byte-vector element-size drop 1 ; inline
20 M: slice element-size seq>> element-size ; inline
22 M: f element-size drop 1 ; inline
24 GENERIC: byte-length ( obj -- n ) flushable
26 M: object byte-length [ length ] [ element-size ] bi * ; inline
28 GENERIC: >c-ptr ( obj -- c-ptr ) flushable
30 M: c-ptr >c-ptr ; inline
33 [ [ from>> ] [ element-size ] bi * ] [ seq>> >c-ptr ] bi
34 <displaced-alien> ; inline
38 M: object >c-ptr underlying>> ; inline
40 : binary-object ( obj -- c-ptr n )
41 [ >c-ptr ] [ byte-length ] bi ; inline
43 GENERIC: expired? ( c-ptr -- ? ) flushable
45 M: alien expired? expired>> ;
47 M: f expired? drop t ;
49 : <alien> ( address -- alien )
50 f <displaced-alien> { pinned-c-ptr } declare ; inline
52 : <bad-alien> ( -- alien )
53 -1 <alien> t >>expired ; inline
57 2dup [ expired? ] either? [
60 [ alien-address ] same?
66 M: pinned-alien hashcode*
67 nip dup expired>> [ drop 1234 ] [ alien-address ] if ;
69 SINGLETONS: stdcall thiscall fastcall cdecl mingw ;
71 UNION: abi stdcall thiscall fastcall cdecl mingw ;
73 : callee-cleanup? ( abi -- ? )
74 { stdcall fastcall thiscall } member? ;
76 ERROR: alien-callback-error ;
78 : alien-callback ( return parameters abi quot -- alien )
79 alien-callback-error ;
81 ERROR: alien-indirect-error ;
83 : alien-indirect ( args... funcptr return parameters abi -- return... )
84 alien-indirect-error ;
86 ERROR: alien-invoke-error library symbol ;
88 : alien-invoke ( args... return library function parameters -- return... )
89 2over alien-invoke-error ;
91 ERROR: alien-assembly-error code ;
93 : alien-assembly ( args... return parameters abi quot -- return... )
94 dup alien-assembly-error ;
98 ! Callbacks are registered in a global hashtable. Note that they
99 ! are also pinned in a special callback area, so clearing this
100 ! hashtable will not reclaim callbacks. It should only be
101 ! cleared on startup.
104 [ H{ } clone callbacks set-global ] "alien" add-startup-hook
106 ! Used by compiler.codegen to wrap callback bodies
107 : do-callback ( callback-quot wait-quot: ( callback -- ) -- )
108 t CONTEXT-OBJ-IN-CALLBACK-P set-context-object
112 [ 2drop call ] [ swap call( callback -- ) drop ] 3bi ; inline
114 ! A utility for defining global variables that are recompiled in
116 TUPLE: expiry-check object alien ;
118 : recompute-value? ( check -- ? )
119 dup [ alien>> expired? ] [ drop t ] if ;
123 : initialize-alien ( symbol quot -- )
124 swap dup get-global dup recompute-value?
125 [ drop [ call dup 31337 <alien> expiry-check boa ] dip set-global ]
126 [ 2nip object>> ] if ; inline