3 (define-designator filename c-string
5 (sb-ext:native-namestring (translate-logical-pathname filename)))
8 (define-designator file-descriptor (integer 32)
9 (file-stream (sb-sys:fd-stream-fd file-descriptor))
10 (fixnum file-descriptor))
12 (define-designator sap-or-nil sb-sys:system-area-pointer
13 (null (sb-sys:int-sap 0))
14 (sb-sys:system-area-pointer sap-or-nil))
16 (define-designator alien-pointer-to-anything-or-nil (* t)
17 (null (sb-alien:sap-alien (sb-sys:int-sap 0) (* t)))
18 ((alien (* t)) alien-pointer-to-anything-or-nil))
20 (defun lisp-for-c-symbol (name)
23 (lisp-for-c-symbol (car name)))
25 (let ((root (if (eql #\_ (char name 0)) (subseq name 1) name)))
26 (intern (substitute #\- #\_ (string-upcase root)) :sb-posix)))))
28 ;; Note: this variable is set in interface.lisp. defined here for
29 ;; clarity and so the real-c-name compile as desired.
30 (defparameter *c-functions-in-runtime* nil)
32 (defun real-c-name (name)
36 (destructuring-bind (name &key c-name options) name
40 ((or (eql options :largefile)
41 (member :largefile options))
42 (format nil "~a_largefile" name))
47 (if (member maybe-name *c-functions-in-runtime*
49 (format nil "_~A" maybe-name)
52 (defmacro define-call-internally (lisp-name c-name return-type error-predicate
54 (if (sb-sys:find-foreign-symbol-address c-name)
56 (declaim (inline ,lisp-name))
57 (defun ,lisp-name ,(mapcar #'car arguments)
58 (let ((r (alien-funcall
61 (function ,return-type
72 `(,(intern (symbol-name (cadr x))
77 (if (,error-predicate r) (syscall-error) r))))
78 `(sb-int:style-warn "Didn't find definition for ~S" ,c-name)))
80 (defmacro define-call (name return-type error-predicate &rest arguments)
81 (let ((lisp-name (lisp-for-c-symbol name))
82 (real-c-name (real-c-name name)))
84 (export ',lisp-name :sb-posix)
85 (define-call-internally ,lisp-name
91 (defmacro define-entry-point (name arglist &body body)
92 (let ((lisp-name (lisp-for-c-symbol name)))
94 (export ',lisp-name :sb-posix)
95 (declaim (inline ,lisp-name))
96 (defun ,lisp-name ,arglist