;; TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
;; SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
-;; $Id: glib.lisp,v 1.41 2007-09-07 07:33:51 espen Exp $
+;; $Id: glib.lisp,v 1.42 2007-10-17 14:30:41 espen Exp $
(in-package "GLIB")
(address pointer)
(size unsigned-long))
+(deftype gsize () 'unsigned-int)
-;;;; User data mechanism
+(defbinding (slice-alloc "g_slice_alloc0") () pointer
+ (block-size gsize))
+
+;;;; User data is a mechanism to store references to lisp objects in
+;;;; foreign code
(defvar *user-data-lock* (make-mutex))
(defvar *user-data* (make-hash-table))
-(defvar *user-data-count* 0)
+(defvar *user-data-next-id* 1)
(defun register-user-data (object &optional destroy-function)
(check-type destroy-function (or null symbol function))
(with-mutex (*user-data-lock*)
- (incf *user-data-count*)
(setf
- (gethash *user-data-count* *user-data*)
+ (gethash *user-data-next-id* *user-data*)
(cons object destroy-function))
- *user-data-count*))
+ (1- (incf *user-data-next-id*))))
(defun find-user-data (id)
(check-type id fixnum)
(defun destroy-user-data (id)
(check-type id fixnum)
(with-mutex (*user-data-lock*)
- (let ((user-data (gethash id *user-data*)))
- (when (cdr user-data)
- (funcall (cdr user-data) (car user-data))))
- (remhash id *user-data*)))
+ (multiple-value-bind (user-data exists-p) (gethash id *user-data*)
+ (cond
+; ((not exists-p) (error "User data id ~A does not exist" id))
+ (t
+ (when (cdr user-data)
+ (funcall (cdr user-data) (car user-data)))
+ (remhash id *user-data*))))))
+
+(defun take-user-data (id)
+ (check-type id fixnum)
+ (multiple-value-bind (user-data exists-p) (gethash id *user-data*)
+ (cond
+ ((not exists-p) (error "User data id ~A does not exist" id))
+ (t
+ (when (cdr user-data)
+ (funcall (cdr user-data) (car user-data)))
+ (remhash id *user-data*)
+ (car user-data)))))
+
+(defmacro with-user-data ((var object) &body body)
+ `(let ((,var (register-user-data ,object)))
+ (unwind-protect
+ ,@body
+ (destroy-user-data ,var))))
+
+
+(deftype user-data-id () 'pointer-data)
;;;; Quarks