(in-package :sb-posix-internal)
+;;; some explanation may be necessary. The namestring "[foo]"
+;;; denotes a wild pathname. When there's a file on the disk whose
+;;; Unix name is "[foo]", the appropriate CL namestring for it is
+;;; "\\[foo]". So, don't call NAMESTRING, instead call a function
+;;; that gets us the Unix name
+(defun native-filename (pathname)
+ (let ((directory (pathname-directory pathname))
+ (name (pathname-name pathname))
+ (type (pathname-type pathname)))
+ (with-output-to-string (s nil :element-type 'base-char)
+ (etypecase directory
+ (string (write-string directory s))
+ (list
+ (when (eq (car directory) :absolute)
+ (write-char #\/ s))
+ (dolist (piece (cdr directory))
+ (etypecase piece
+ (string (write-string piece s) (write-char #\/ s))
+ ((member :up) (write-string "../" s))))))
+ (etypecase name
+ (null)
+ (string (write-string name s)))
+ (etypecase type
+ (null)
+ (string (write-char #\. s) (write-string type s))))))
+
+(define-designator filename c-string
+ (pathname
+ (native-filename (translate-logical-pathname filename)))
+ (string filename))
+
+(define-designator file-descriptor (integer 32)
+ (file-stream (sb-sys:fd-stream-fd file-descriptor))
+ (fixnum file-descriptor))
+
+(define-designator sap-or-nil sb-sys:system-area-pointer
+ (null (sb-sys:int-sap 0))
+ (sb-sys:system-area-pointer sap-or-nil))
+
+(define-designator alien-pointer-to-anything-or-nil (* t)
+ (null (sb-alien:sap-alien (sb-sys:int-sap 0) (* t)))
+ ((alien (* t)) alien-pointer-to-anything-or-nil))
+
(defun lisp-for-c-symbol (s)
(intern (substitute #\- #\_ (string-upcase s)) :sb-posix))
+(defmacro define-call-internally (lisp-name c-name return-type error-predicate &rest arguments)
+ (if (sb-fasl::foreign-symbol-address-as-integer-or-nil
+ (sb-vm:extern-alien-name c-name))
+ `(progn
+ (declaim (inline ,lisp-name))
+ (defun ,lisp-name ,(mapcar #'car arguments)
+ (let ((r (alien-funcall
+ (extern-alien
+ ,c-name
+ (function ,return-type
+ ,@(mapcar
+ (lambda (x)
+ (gethash (cadr x) *designator-types* (cadr x)))
+ arguments)))
+ ,@(mapcar (lambda (x)
+ (if (nth-value 1 (gethash (cadr x) *designator-types*))
+ `(,(intern (symbol-name (cadr x)) :sb-posix)
+ ,(car x))
+ (car x)))
+ arguments))))
+ (if (,error-predicate r) (syscall-error) r))))
+ `(sb-int:style-warn "Didn't find definition for ~S" ,c-name)))
+
(defmacro define-call (name return-type error-predicate &rest arguments)
(let ((lisp-name (lisp-for-c-symbol name)))
`(progn
+ (export ',lisp-name :sb-posix)
+ (define-call-internally ,lisp-name ,name ,return-type ,error-predicate ,@arguments))))
+
+(defmacro define-entry-point (name arglist &body body)
+ (let ((lisp-name (lisp-for-c-symbol name)))
+ `(progn
(export ',lisp-name :sb-posix)
(declaim (inline ,lisp-name))
- (defun ,lisp-name ,(mapcar #'car arguments)
- (let ((r (alien-funcall
- (extern-alien
- ,name
- (function ,return-type
- ,@(mapcar
- (lambda (x)
- (get (cadr x) 'designator-type (cadr x)))
- arguments)))
- ,@(mapcar (lambda (x)
- (if (get (cadr x) 'designator-type)
- `(,(intern (symbol-name (cadr x)) :sb-posix)
- ,(car x))
- (car x)))
- arguments))))
- (if (,error-predicate r) (syscall-error) r))))))
+ (defun ,lisp-name ,arglist
+ ,@body))))