src/share/vm/runtime/mutex.hpp
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*** 1,7 ****
/*
! * Copyright (c) 1998, 2008, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
--- 1,7 ----
/*
! * Copyright (c) 1998, 2010, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*** 20,29 ****
--- 20,36 ----
* or visit www.oracle.com if you need additional information or have any
* questions.
*
*/
+ #ifndef SHARE_VM_RUNTIME_MUTEX_HPP
+ #define SHARE_VM_RUNTIME_MUTEX_HPP
+
+ #include "memory/allocation.hpp"
+ #include "runtime/os.hpp"
+ #include "utilities/histogram.hpp"
+
// The SplitWord construct allows us to colocate the contention queue
// (cxq) with the lock-byte. The queue elements are ParkEvents, which are
// always aligned on 256-byte addresses - the least significant byte of
// a ParkEvent is always 0. Colocating the lock-byte with the queue
// allows us to easily avoid what would otherwise be a race in lock()
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ShouldNotReachHere() ;
return false ;
}
};
+
+ #endif // SHARE_VM_RUNTIME_MUTEX_HPP