X-Git-Url: http://repo.macrolet.net/gitweb/?a=blobdiff_plain;ds=sidebyside;f=src%2Fcode%2Ftarget-unithread.lisp;h=e11ec9d3eb188d17b4e920b55101bcfb700ec42a;hb=f1407e424f1063203af07d2e61ceef58515a4797;hp=bd57e74e537b07ad19cfdd7f5901188dcac454ae;hpb=d767105094f5836327f9389b061f83a44240a279;p=sbcl.git

diff --git a/src/code/target-unithread.lisp b/src/code/target-unithread.lisp
index bd57e74..e11ec9d 100644
--- a/src/code/target-unithread.lisp
+++ b/src/code/target-unithread.lisp
@@ -1,5 +1,6 @@
 (in-package "SB!THREAD")
 
+;;; used bu debug-int.lisp to access interrupt contexts
 #!-sb-fluid (declaim (inline sb!vm::current-thread-offset-sap))
 (defun sb!vm::current-thread-offset-sap (n) 
   (declare (type (unsigned-byte 27) n))
@@ -7,8 +8,8 @@
 	       (* n 4)))
 
 (defun current-thread-id ()
-  (sb!sys:sap-int
-   (sb!vm::current-thread-offset-sap sb!vm::thread-pid-slot)))
+  (sb!sys:sap-ref-32 (alien-sap (extern-alien "all_threads" (* t))) 
+	       (* sb!vm::thread-pid-slot 4)))
 
 ;;;; queues, locks 
 
@@ -90,8 +91,15 @@
      (setf old-value t1))))
 
 (defmacro with-mutex ((mutex &key value (wait-p t))  &body body)
-  (declare (ignore mutex value wait-p))
-  `(progn ,@body))
+  (cond ((not wait-p)
+	 `(unless (mutex-value ,mutex)
+	   (unwind-protect
+		(progn
+		  (setf (mutex-value ,mutex) (or ,value t))
+		  ,@body)
+	     (setf (mutex-value ,mutex) nil))))
+	(t 
+	 `(progn ,@body))))
 
 ;;; what's the best thing to do with these on unithread?
 #+NIl