glib/gobject.foreign.lisp

   1 (in-package :gobject)
   2
   3 (defgeneric release (object)
   4   (:documentation "Manually frees the Lisp reference to the @code{object}. Probably should not be called.
   5
   6 @arg[object]{an instance of @class{g-object}}"))
   7
   8 (defmethod release ((object null)))
   9
  10 (defun release* (&rest objects)
  11   "Calls @fun{release} on all objects in @code{objects}
  12
  13 @arg[objects]{a list of instances of @class{g-object}}"
  14   (declare (dynamic-extent objects))
  15   (loop
  16      for object in objects
  17      do (release object)))
  18
  19 (defmacro using ((var &optional (expr var)) &body body)
  20   `(let ((,var ,expr))
  21      (unwind-protect
  22           (progn ,@body)
  23        (release ,var))))
  24
  25 (defun using-expand (bindings body)
  26   (if bindings
  27       (destructuring-bind (var &optional (expr var)) (ensure-list (first bindings))
  28        `(let ((,var ,expr))
  29           (unwind-protect
  30                ,(using-expand (rest bindings) body)
  31             (release ,var))))
  32       `(progn ,@body)))
  33
  34 (defmacro using* ((&rest bindings) &body body)
  35   (using-expand bindings body))