;; TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
;; SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
-;; $Id: gdk.lisp,v 1.25 2006-04-11 18:28:38 espen Exp $
+;; $Id: gdk.lisp,v 1.26 2006-04-25 13:37:28 espen Exp $
(in-package "GDK")
;; (cr cairo:context)
;; (region region))
)
+
+
+;;; Multi-threading support
+
+#+sbcl
+(progn
+ (defvar *global-lock* (sb-thread:make-mutex :name "global GDK lock"))
+ (let ((recursive-level 0))
+ (defun threads-enter ()
+ (if (eq (sb-thread:mutex-value *global-lock*) sb-thread:*current-thread*)
+ (incf recursive-level)
+ (sb-thread:get-mutex *global-lock*)))
+
+ (defun threads-leave (&optional flush-p)
+ (cond
+ ((zerop recursive-level)
+ (when flush-p
+ (display-flush))
+ (sb-thread:release-mutex *global-lock*))
+ (t (decf recursive-level)))))
+
+ (define-callback %enter-fn nil ()
+ (threads-enter))
+
+ (define-callback %leave-fn nil ()
+ (threads-leave))
+
+ (defbinding threads-set-lock-functions (&optional) nil
+ (%enter-fn callback)
+ (%leave-fn callback))
+
+ (defmacro with-global-lock (&body body)
+ `(progn
+ (threads-enter)
+ (unwind-protect
+ (progn ,@body)
+ (threads-leave t)))))