1 files changed, 59 insertions, 0 deletions
diff --git a/bindings/cl/meta.lisp b/bindings/cl/meta.lisp
new file mode 100644
index 0000000..751a089
--- /dev/null
+++ b/bindings/cl/meta.lisp
@@ -0,0 +1,59 @@
+;; Copyright (c) 2009 Vitaly Mayatskikh <v.mayatskih@gmail.com>
+;;
+;; This file is part of 0MQ.
+;;
+;; 0MQ is free software; you can redistribute it and/or modify it under
+;; the terms of the Lesser GNU General Public License as published by
+;; the Free Software Foundation; either version 3 of the License, or
+;; (at your option) any later version.
+;;
+;; 0MQ is distributed in the hope that it will be useful,
+;; but WITHOUT ANY WARRANTY; without even the implied warranty of
+;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+;; Lesser GNU General Public License for more details.
+;;
+;; You should have received a copy of the Lesser GNU General Public License
+;; along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+(in-package :zeromq)
+
+(define-condition error-again (error)
+  ((argument :reader error-again :initarg :argument))
+  (:report (lambda (condition stream)
+	     (write-string (convert-from-foreign
+			    (%strerror (error-again condition))
+			    :string)
+			   stream))))
+
+(defmacro defcfun* (name-and-options return-type &body args)
+  (let* ((c-name (car name-and-options))
+	 (l-name (cadr name-and-options))
+	 (n-name (cffi::format-symbol t "%~A" l-name))
+	 (name (list c-name n-name))
+
+	 (docstring (when (stringp (car args)) (pop args)))
+	 (ret (gensym)))
+    (loop with opt
+       for i in args
+       unless (consp i) do (setq opt t)
+       else
+       collect i into args*
+       and if (not opt) collect (car i) into names
+       else collect (car i) into opts
+       and collect (list (car i) 0) into opts-init
+       end
+       finally (return
+	 `(progn
+	    (defcfun ,name ,return-type
+	      ,@args*)
+
+	    (defun ,l-name (,@names &optional ,@opts-init)
+	      ,docstring
+	      (let ((,ret (,n-name ,@names ,@opts)))
+		(if ,(if (eq return-type :pointer)
+			   `(zerop (pointer-address ,ret))
+			   `(not (zerop ,ret)))
+		    (cond
+		      ((eq *errno* isys:eagain) (error 'error-again :argument *errno*))
+		      (t (error (convert-from-foreign (%strerror *errno*) :string))))
+		,ret))))))))