3 (define-designator filename c-string
5 (sb-ext:native-namestring (translate-logical-pathname filename)
9 (define-designator file-descriptor (integer 32)
10 (file-stream (sb-sys:fd-stream-fd file-descriptor))
11 (fixnum file-descriptor))
13 (define-designator sap-or-nil sb-sys:system-area-pointer
14 (null (sb-sys:int-sap 0))
15 (sb-sys:system-area-pointer sap-or-nil))
17 (define-designator alien-pointer-to-anything-or-nil (* t)
18 (null (sb-alien:sap-alien (sb-sys:int-sap 0) (* t)))
19 ((alien (* t)) alien-pointer-to-anything-or-nil))
21 (defun lisp-for-c-symbol (name)
24 (lisp-for-c-symbol (car name)))
26 (let ((root (if (eql #\_ (char name 0)) (subseq name 1) name)))
27 (intern (substitute #\- #\_ (string-upcase root)) :sb-posix)))))
29 ;; Note: this variable is set in interface.lisp. defined here for
30 ;; clarity and so the real-c-name compile as desired.
31 (defparameter *c-functions-in-runtime* nil)
33 (defun real-c-name (name)
37 (destructuring-bind (name &key c-name options) name
38 (declare (ignorable options))
42 ((or (eql options :largefile)
43 (member :largefile options))
44 (format nil "~a_largefile" name))
49 (if (member maybe-name *c-functions-in-runtime*
51 (format nil "_~A" maybe-name)
54 (defmacro define-call-internally (lisp-name c-name return-type error-predicate
56 (if (sb-sys:find-foreign-symbol-address c-name)
58 (declaim (inline ,lisp-name))
59 (defun ,lisp-name ,(mapcar #'car arguments)
60 (let ((r (alien-funcall
63 (function ,return-type
74 `(,(intern (symbol-name (cadr x))
79 (if (,error-predicate r) (syscall-error) r))))
80 `(sb-int:style-warn "Didn't find definition for ~S" ,c-name)))
82 (defmacro define-call (name return-type error-predicate &rest arguments)
83 (let ((lisp-name (lisp-for-c-symbol name))
84 (real-c-name (real-c-name name)))
86 (export ',lisp-name :sb-posix)
87 (define-call-internally ,lisp-name
93 (defmacro define-entry-point (name arglist &body body)
94 (let ((lisp-name (lisp-for-c-symbol name)))
96 (export ',lisp-name :sb-posix)
97 (declaim (inline ,lisp-name))
98 (defun ,lisp-name ,arglist