--- Libc/Libc-583/threads/mig_support.c
+++ Libc/Libc-262/threads/mig_support.c
@@ -3,20 +3,19 @@
  *
  * @APPLE_LICENSE_HEADER_START@
  * 
- * This file contains Original Code and/or Modifications of Original Code
- * as defined in and that are subject to the Apple Public Source License
- * Version 2.0 (the 'License'). You may not use this file except in
- * compliance with the License. Please obtain a copy of the License at
- * http://www.opensource.apple.com/apsl/ and read it before using this
- * file.
+ * The contents of this file constitute Original Code as defined in and
+ * are subject to the Apple Public Source License Version 1.1 (the
+ * "License").  You may not use this file except in compliance with the
+ * License.  Please obtain a copy of the License at
+ * http://www.apple.com/publicsource and read it before using this file.
  * 
- * The Original Code and all software distributed under the License are
- * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+ * This Original Code and all software distributed under the License are
+ * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
- * Please see the License for the specific language governing rights and
- * limitations under the License.
+ * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
+ * License for the specific language governing rights and limitations
+ * under the License.
  * 
  * @APPLE_LICENSE_HEADER_END@
  */
@@ -81,11 +80,11 @@
         pthread_t pself;
 #ifdef	CTHREADS_DEBUG
 	int d = cthread_debug;
-#endif	/* CTHREADS_DEBUG */
+#endif	CTHREADS_DEBUG
 
 #ifdef	CTHREADS_DEBUG
 	cthread_debug = FALSE;
-#endif	/* CTHREADS_DEBUG */
+#endif	CTHREADS_DEBUG
         pself = pthread_self();
         if ((pself != (pthread_t)NULL) && (pself->sig == _PTHREAD_SIG)) {
             if (pself->reply_port == MACH_PORT_NULL) {
@@ -97,7 +96,7 @@
 	if (self == NO_CPROC) {
 #ifdef	CTHREADS_DEBUG
 		cthread_debug = d;
-#endif	/* CTHREADS_DEBUG */
+#endif	CTHREADS_DEBUG
 		return(_task_reply_port);
 	}
         if (self->reply_port == MACH_PORT_NULL) {
@@ -105,7 +104,7 @@
         }
 #ifdef	CTHREADS_DEBUG
 	cthread_debug = d;
-#endif	/* CTHREADS_DEBUG */
+#endif	CTHREADS_DEBUG
 	return self->reply_port;
 }
 
@@ -122,18 +121,18 @@
 	register mach_port_t port;
 #ifdef	CTHREADS_DEBUG
 	int d = cthread_debug;
-#endif	/* CTHREADS_DEBUG */
+#endif	CTHREADS_DEBUG
 
 #ifdef	CTHREADS_DEBUG
 	cthread_debug = FALSE;
-#endif	/* CTHREADS_DEBUG */
+#endif	CTHREADS_DEBUG
         pself = pthread_self();
         if ((pself != (pthread_t)NULL) && (pself->sig == _PTHREAD_SIG)) {
             port = pself->reply_port;
             if (port != MACH_PORT_NULL && port != _task_reply_port) {
                     LOCK(reply_port_lock);
                     pself->reply_port = _task_reply_port;
-                    (void) mach_port_mod_refs(mach_task_self(), port, MACH_PORT_RIGHT_RECEIVE, -1);
+                    (void) mach_port_destroy(mach_task_self(), port);
                     pself->reply_port = MACH_PORT_NULL;
                     UNLOCK(reply_port_lock);
             }
@@ -143,7 +142,7 @@
 	if (self == NO_CPROC) {
 #ifdef	CTHREADS_DEBUG
 		cthread_debug = d;
-#endif	/* CTHREADS_DEBUG */
+#endif	CTHREADS_DEBUG
 		return;
 	}
 	ASSERT(self != NO_CPROC);
@@ -151,13 +150,13 @@
         if (port != MACH_PORT_NULL && port != _task_reply_port) {
 		LOCK(reply_port_lock);
                 self->reply_port = _task_reply_port;
-		(void) mach_port_mod_refs(mach_task_self(), port, MACH_PORT_RIGHT_RECEIVE, -1);
+                (void) mach_port_destroy(mach_task_self(), port);
                 self->reply_port = MACH_PORT_NULL;
 		UNLOCK(reply_port_lock);
 	}
 #ifdef	CTHREADS_DEBUG
 	cthread_debug = d;
-#endif	/* CTHREADS_DEBUG */
+#endif	CTHREADS_DEBUG
 }
 
 /*************************************************************