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(defmacro sys:dlib-expr (spec)
(typecase spec
(null ^(dlopen))
(str ^(dlopen ,spec rtld-now))
(t spec)))
(defmacro with-dyn-lib (lib . body)
(let ((keep-var (gensym "lib-")))
^(prog1
(defvarl ,keep-var (sys:dlib-expr ,lib))
(symacrolet ((sys:ffi-lib ,keep-var))
,*body))))
(defun sys:analyze-argtypes (form argtypes)
(let ((p (posq : argtypes)))
(when p
(if (zerop p)
(compile-error form "variadic with zero fixed arguments not allowed")
(del [argtypes p])))
(list* (length argtypes) p argtypes)))
(defmacro deffi (:form f name fun-expr rettype argtypes)
(let ((fun-ref (cond
((stringp fun-expr)
^(dlsym-checked sys:ffi-lib ,fun-expr))
((consp fun-expr)
(mac-param-bind f (sym ver) fun-expr
^(dlvsym-checked sys:ffi-lib ,sym ,ver)))
(t fun-expr)))
(ret-type-sym (gensym "ret-type-"))
(arg-types-sym (gensym "arg-types-"))
(call-desc-sym (gensym "call-desc-"))
(fun-sym (gensym "ffi-fun-")))
(tree-bind (nargs nvariadic . argtypes) (sys:analyze-argtypes f argtypes)
(let ((arg-syms (take nargs (gun (gensym)))))
^(progn
(defvarl ,ret-type-sym (ffi-type-compile ',rettype))
(defvarl ,arg-types-sym [mapcar ffi-type-compile ',argtypes])
(defvarl ,call-desc-sym (ffi-make-call-desc ,nargs ,nvariadic
,ret-type-sym
,arg-types-sym))
(defvarl ,fun-sym ,fun-ref)
(defun ,name ,arg-syms
(ffi-call ,fun-sym ,call-desc-sym ,*arg-syms)))))))
(defmacro deffi-type (name type-expr)
^(ffi-typedef ',name (ffi-type-compile ',type-expr)))
(defmacro typedef (name type-expr)
^(ffi-typedef ',name (ffi-type-compile ',type-expr)))
(defun sys:deffi-cb-expander (f name rettype argtypes safe-p abort-retval)
(let ((ret-type-sym (gensym "ret-type-"))
(arg-types-sym (gensym "arg-types-"))
(call-desc-sym (gensym "call-desc-"))
(fun-sym (gensym "fun-")))
(tree-bind (nargs nvariadic . argtypes) (sys:analyze-argtypes f argtypes)
^(progn
(defvarl ,ret-type-sym (ffi-type-compile ',rettype))
(defvarl ,arg-types-sym [mapcar ffi-type-compile ',argtypes])
(defvarl ,call-desc-sym (ffi-make-call-desc ,nargs ,nvariadic
,ret-type-sym
,arg-types-sym))
(defun ,name (,fun-sym)
[ffi-make-closure ,fun-sym ,call-desc-sym ,safe-p ,abort-retval])))))
(defmacro deffi-cb (:form f name rettype argtypes : abort-retval)
(sys:deffi-cb-expander f name rettype argtypes t abort-retval))
(defmacro deffi-cb-unsafe (:form f name rettype argtypes)
(sys:deffi-cb-expander f name rettype argtypes nil nil))
(defmacro deffi-var (:form f name var-expr type)
(let ((var-ref (cond
((stringp var-expr)
^(dlsym-checked sys:ffi-lib ,var-expr))
((consp var-expr)
(mac-param-bind f (sym ver) var-expr
^(dlvsym-checked sys:ffi-lib ,sym ,ver)))
(t var-expr)))
(type-sym (gensym "type-"))
(var-sym (gensym "var-")))
^(progn
(defvarl ,type-sym (ffi ,type))
(defvarl ,var-sym (carray-cptr ,var-ref ,type-sym 1))
(defsymacro ,name (carray-ref ,var-sym 0)))))
(defmacro sizeof (type)
(ffi-size (ffi-type-compile type)))
(defmacro alignof (type)
(ffi-alignof (ffi-type-compile type)))
(defmacro offsetof (struct memb)
(ffi-offsetof (ffi-type-compile struct) memb))
(defmacro arraysize (arr)
(ffi-arraysize (ffi-type-compile arr)))
(defmacro elemtype (type)
^(ffi-elemtype (ffi-type-compile ',type)))
(defmacro elemsize (type)
(ffi-elemsize (ffi-type-compile type)))
(defmacro ffi (type)
^(ffi-type-compile ',type))
(define-accessor carray-ref carray-refset)
(define-place-macro carray-sub (carray : (from 0) (to t))
^(sub ,carray ,from ,to))
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