diff -r 73ea206103e6 -r 43365a9b78a3 kernel/eka/include/e32std.h
--- a/kernel/eka/include/e32std.h	Wed Jun 23 19:44:53 2010 +0300
+++ b/kernel/eka/include/e32std.h	Tue Jul 06 15:50:07 2010 +0300
@@ -3314,6 +3314,8 @@
 	IMPORT_C TInt Open(RMessagePtr2 aMessage,TInt aParam,TOwnerType aType=EOwnerProcess);
 	IMPORT_C TInt Open(TInt aArgumentIndex, TOwnerType aType=EOwnerProcess);
 	IMPORT_C void Wait();
+	IMPORT_C TInt Poll();		// acquire the lock if possible, but don't block
+	IMPORT_C TInt Wait(TInt aTimeout);	// timeout in microseconds
 	IMPORT_C void Signal();
 	IMPORT_C TBool IsHeld();
 	};