added: a deadlock counter to Synchro class

now we can use Lock() more than one in the same thread
       and next Unlock() will recognize it
       sample:
       Lock(); // first lock -- resources locked
       Lock(); // second lock -- skipped (counter incremented)
       ...
       Unlock(); // first unlock -- skipped (because counter greater than zero)
       Unlock(); // second unlock -- actually unlocking


git-svn-id: svn://ttmath.org/publicrep/winix/trunk@830 e52654a7-88a9-db11-a3e9-0013d4bc506e

core/synchro.h

@@ -2,7 +2,7 @@
  * This file is a part of Winix
  * and is not publicly distributed
  * 
- * Copyright (c) 2010, Tomasz Sowa
+ * Copyright (c) 2010-2012, Tomasz Sowa
  * All rights reserved.
  * 
  */
@@ -28,6 +28,13 @@ struct Synchro
 
 	bool Lock();
 	void Unlock();
+
+private:
+
+	// deadlock counter
+	// we can call Lock() more than one in the same thread
+	int ref;
+
 };