natUnsafe.cc (spinlock contructor): Call sched_yield().

2009-01-12  Andrew Haley  <aph@redhat.com>

	* sun/misc/natUnsafe.cc (spinlock contructor): Call sched_yield().

From-SVN: r143302

libjava/ChangeLog

+2009-01-12  Andrew Haley  <aph@redhat.com>
+
+	* sun/misc/natUnsafe.cc (spinlock contructor): Call sched_yield().
+
 2009-01-11  Matthias Klose  <doko@ubuntu.com>
 
 	* Makefile.am (ecjx_LDADD): Add $(extra_ldflags).

libjava/sun/misc/natUnsafe.cc

 // natUnsafe.cc - Implementation of sun.misc.Unsafe native methods.
 
-/* Copyright (C) 2006
+/* Copyright (C) 2006, 2007
    Free Software Foundation
 
    This file is part of libgcj.
@@ -32,7 +32,7 @@ public:
 spinlock ()
   {
     while (! compare_and_swap (&lock, 0, 1))
-      ;
+      _Jv_ThreadYield ();
   }
   ~spinlock ()
   {