64 lines
1.9 KiB
Factor
64 lines
1.9 KiB
Factor
! 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 arrays generic hashtables kernel kernel.private
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math namespaces parser sequences strings words libc fry
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alien.c-types alien.structs.fields cpu.architecture ;
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IN: alien.structs
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TUPLE: struct-type size align fields ;
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M: struct-type heap-size size>> ;
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M: struct-type c-type-class drop object ;
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M: struct-type c-type-align align>> ;
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M: struct-type c-type-stack-align? drop f ;
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: if-value-struct ( ctype true false -- )
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[ dup value-struct? ] 2dip '[ drop "void*" @ ] if ; inline
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M: struct-type unbox-parameter
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[ %unbox-large-struct ] [ unbox-parameter ] if-value-struct ;
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M: struct-type box-parameter
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[ %box-large-struct ] [ box-parameter ] if-value-struct ;
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: if-small-struct ( c-type true false -- ? )
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[ dup struct-small-enough? ] 2dip '[ f swap @ ] if ; inline
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M: struct-type unbox-return
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[ %unbox-small-struct ] [ %unbox-large-struct ] if-small-struct ;
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M: struct-type box-return
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[ %box-small-struct ] [ %box-large-struct ] if-small-struct ;
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M: struct-type stack-size
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[ heap-size ] [ stack-size ] if-value-struct ;
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: c-struct? ( type -- ? ) (c-type) struct-type? ;
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: (define-struct) ( name size align fields -- )
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[ [ align ] keep ] dip
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struct-type boa
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swap typedef ;
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: make-fields ( name vocab fields -- fields )
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[ first2 <field-spec> ] with with map ;
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: compute-struct-align ( types -- n )
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[ c-type-align ] map supremum ;
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: define-struct ( name vocab fields -- )
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[
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[ 2drop ] [ make-fields ] 3bi
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[ struct-offsets ] keep
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[ [ type>> ] map compute-struct-align ] keep
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[ (define-struct) ] keep
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] [ 2drop '[ _ swap define-field ] ] 3bi each ;
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: define-union ( name members -- )
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[ expand-constants ] map
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[ [ heap-size ] map supremum ] keep
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compute-struct-align f (define-struct) ;
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