175 lines
8.0 KiB
Scheme
175 lines
8.0 KiB
Scheme
(define-module retropikzel.pffi.gauche
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(export size-of-type
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pffi-shared-object-load
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;pffi-pointer-null
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;pffi-pointer-null?
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make-c-bytevector
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pffi-pointer-address
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c-bytevector?
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c-free
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pffi-pointer-set!
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pffi-pointer-get
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define-c-procedure))
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(select-module retropikzel.pffi.gauche)
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(dynamic-load "retropikzel/pffi/gauche-pffi")
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(define size-of-type
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(lambda (type)
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(cond
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((equal? type 'int8) (size-of-int8))
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((equal? type 'uint8) (size-of-uint8))
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((equal? type 'int16) (size-of-int16))
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((equal? type 'uint16) (size-of-uint16))
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((equal? type 'int32) (size-of-int32))
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((equal? type 'uint32) (size-of-uint32))
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((equal? type 'int64) (size-of-int64))
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((equal? type 'uint64) (size-of-uint64))
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((equal? type 'char) (size-of-char))
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((equal? type 'unsigned-char) (size-of-unsigned-char))
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((equal? type 'short) (size-of-short))
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((equal? type 'unsigned-short) (size-of-unsigned-short))
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((equal? type 'int) (size-of-int))
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((equal? type 'unsigned-int) (size-of-unsigned-int))
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((equal? type 'long) (size-of-long))
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((equal? type 'unsigned-long) (size-of-unsigned-long))
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((equal? type 'float) (size-of-float))
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((equal? type 'double) (size-of-double))
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((equal? type 'string) (size-of-string))
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((equal? type 'pointer) (size-of-pointer))
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((equal? type 'void) (size-of-void)))))
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(define pffi-shared-object-load
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(lambda (path options)
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(shared-object-load path)))
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(define make-c-bytevector
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(lambda (size)
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(pointer-allocate size)))
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(define c-bytevector?
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(lambda (pointer)
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(pointer? pointer)))
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(define c-free
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(lambda (pointer)
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(pointer-free pointer)))
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(define pffi-pointer-set!
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(lambda (pointer type offset value)
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(cond ((equal? type 'int8) (pointer-set-int8! pointer offset value))
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((equal? type 'uint8) (pointer-set-uint8! pointer offset value))
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((equal? type 'int16) (pointer-set-int16! pointer offset value))
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((equal? type 'uint16) (pointer-set-uint16! pointer offset value))
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((equal? type 'int32) (pointer-set-int32! pointer offset value))
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((equal? type 'uint32) (pointer-set-uint32! pointer offset value))
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((equal? type 'int64) (pointer-set-int64! pointer offset value))
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((equal? type 'uint64) (pointer-set-uint64! pointer offset value))
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((equal? type 'char) (pointer-set-char! pointer offset value))
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((equal? type 'short) (pointer-set-short! pointer offset value))
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((equal? type 'unsigned-short) (pointer-set-unsigned-short! pointer offset value))
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((equal? type 'int) (pointer-set-int! pointer offset value))
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((equal? type 'unsigned-int) (pointer-set-unsigned-int! pointer offset value))
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((equal? type 'long) (pointer-set-long! pointer offset value))
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((equal? type 'unsigned-long) (pointer-set-unsigned-long! pointer offset value))
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((equal? type 'float) (pointer-set-float! pointer offset value))
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((equal? type 'double) (pointer-set-double! pointer offset value))
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((equal? type 'void) (pointer-set-pointer! pointer offset value))
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((equal? type 'pointer) (pointer-set-pointer! pointer offset value)))))
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(define pffi-pointer-get
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(lambda (pointer type offset)
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(cond ((equal? type 'int8) (pointer-get-int8 pointer offset))
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((equal? type 'uint8) (pointer-get-uint8 pointer offset))
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((equal? type 'int16) (pointer-get-int16 pointer offset))
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((equal? type 'uint16) (pointer-get-uint16 pointer offset))
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((equal? type 'int32) (pointer-get-int32 pointer offset))
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((equal? type 'uint32) (pointer-get-uint32 pointer offset))
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((equal? type 'int64) (pointer-get-int64 pointer offset))
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((equal? type 'uint64) (pointer-get-uint64 pointer offset))
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((equal? type 'char) (integer->char (pointer-get-char pointer offset)))
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((equal? type 'short) (pointer-get-short pointer offset))
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((equal? type 'unsigned-short) (pointer-get-unsigned-short pointer offset))
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((equal? type 'int) (pointer-get-int pointer offset))
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((equal? type 'unsigned-int) (pointer-get-unsigned-int pointer offset))
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((equal? type 'long) (pointer-get-long pointer offset))
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((equal? type 'unsigned-long) (pointer-get-unsigned-long pointer offset))
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((equal? type 'float) (pointer-get-float pointer offset))
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((equal? type 'double) (pointer-get-double pointer offset))
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((equal? type 'void) (pointer-get-pointer pointer offset))
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((equal? type 'pointer) (pointer-get-pointer pointer offset)))))
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(define pffi-type->libffi-type
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(lambda (type)
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(cond ((equal? type 'int8) (get-ffi-type-int8))
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((equal? type 'uint8) (get-ffi-type-uint8))
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((equal? type 'int16) (get-ffi-type-int16))
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((equal? type 'uint16) (get-ffi-type-uint16))
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((equal? type 'int32) (get-ffi-type-int32))
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((equal? type 'uint32) (get-ffi-type-uint32))
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((equal? type 'int64) (get-ffi-type-int64))
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((equal? type 'uint64) (get-ffi-type-uint64))
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((equal? type 'char) (get-ffi-type-char))
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((equal? type 'unsigned-char) (get-ffi-type-uchar))
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((equal? type 'bool) (get-ffi-type-int8))
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((equal? type 'short) (get-ffi-type-short))
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((equal? type 'unsigned-short) (get-ffi-type-ushort))
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((equal? type 'int) (get-ffi-type-int))
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((equal? type 'unsigned-int) (get-ffi-type-uint))
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((equal? type 'long) (get-ffi-type-long))
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((equal? type 'unsigned-long) (get-ffi-type-ulong))
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((equal? type 'float) (get-ffi-type-float))
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((equal? type 'double) (get-ffi-type-double))
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((equal? type 'void) (get-ffi-type-void))
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((equal? type 'pointer) (get-ffi-type-pointer))
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((equal? type 'callback) (get-ffi-type-pointer)))))
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(define argument->pointer
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(lambda (value type)
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(cond ((procedure? value) (scheme-procedure-to-pointer value))
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(else (let ((pointer (make-c-bytevector (size-of-type type))))
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(pffi-pointer-set! pointer type 0 value)
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pointer)))))
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(define make-c-function
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(lambda (shared-object c-name return-type argument-types)
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(dlerror) ;; Clean all previous errors
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(let ((c-function (dlsym shared-object c-name))
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(maybe-dlerror (dlerror)))
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#;(when (not (pffi-pointer-null? maybe-dlerror))
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(error (c-bytevector->string maybe-dlerror)))
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(lambda arguments
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(let ((return-value (make-c-bytevector
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(if (equal? return-type 'void)
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0
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(size-of-type return-type)))))
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(internal-ffi-call (length argument-types)
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(pffi-type->libffi-type return-type)
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(map pffi-type->libffi-type argument-types)
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c-function
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return-value
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(map argument->pointer
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arguments
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argument-types))
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(cond ((not (equal? return-type 'void))
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(pffi-pointer-get return-value return-type 0))))))))
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(define-syntax define-c-procedure
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(syntax-rules ()
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((_ scheme-name shared-object c-name return-type argument-types)
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(define scheme-name
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(make-c-function shared-object
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(symbol->string c-name)
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return-type
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argument-types)))))
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(define make-c-callback
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(lambda (return-type argument-types procedure)
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(scheme-procedure-to-pointer procedure)))
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(define-syntax pffi-define-callback
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(syntax-rules ()
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((_ scheme-name return-type argument-types procedure)
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(define scheme-name
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(make-c-callback return-type 'argument-types procedure)))))
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