1.0.1.1:

[sbcl.git] / contrib / sb-posix / macros.lisp

diff --git a/contrib/sb-posix/macros.lisp b/contrib/sb-posix/macros.lisp
index 959843b..dd22a7c 100644 (file)
--- a/contrib/sb-posix/macros.lisp
+++ b/contrib/sb-posix/macros.lisp
@@ -1,64 +1,88 @@
-(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))))))
-      (etypecase name
-       (null)
-        (string (write-string name s)))
-      (etypecase type
-       (null)
-       (string (write-char #\. s) (write-string type s))))))
+(in-package :sb-posix)
 
 (define-designator filename c-string
-  (pathname 
-   (native-filename (translate-logical-pathname filename)))
+  (pathname
+   (sb-ext:native-namestring (translate-logical-pathname filename)))
   (string filename))
 
 (define-designator file-descriptor (integer 32)
-  (sb-impl::file-stream (sb-impl::fd-stream-fd file-descriptor))
+  (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))
 
-(defun lisp-for-c-symbol (s)
-  (intern (substitute #\- #\_ (string-upcase s)) :sb-posix))
+(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 (name)
+  (etypecase name
+    (list
+     (lisp-for-c-symbol (car name)))
+    (string
+     (let ((root (if (eql #\_ (char name 0)) (subseq name 1) name)))
+       (intern (substitute #\- #\_ (string-upcase root)) :sb-posix)))))
+
+(defun real-c-name (name)
+  (etypecase name
+    (list
+     (destructuring-bind (name &key c-name options) name
+       (if c-name
+           c-name
+           (cond #+largefile
+                 ((or (eql options :largefile)
+                      (member :largefile options))
+                  (format nil "~a_largefile" name))
+                 (t
+                  name)))))
+    (string
+     name)))
+
+(defmacro define-call-internally (lisp-name c-name return-type error-predicate
+                                  &rest arguments)
+  (if (sb-sys:find-foreign-symbol-address 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))
+        (real-c-name (real-c-name name)))
+    `(progn
+       (export ',lisp-name :sb-posix)
+       (define-call-internally ,lisp-name
+           ,real-c-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)
-                                 (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))))))
+      (defun ,lisp-name ,arglist
+        ,@body))))