1 /*

     1 /*

     3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

     3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

     4  *

     4  *

     5  * This code is free software; you can redistribute it and/or modify it

     5  * This code is free software; you can redistribute it and/or modify it

     6  * under the terms of the GNU General Public License version 2 only, as

     6  * under the terms of the GNU General Public License version 2 only, as

     7  * published by the Free Software Foundation.

     7  * published by the Free Software Foundation.

    19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

    19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

    20  * or visit www.oracle.com if you need additional information or have any

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    21  * questions.

    21  * questions.

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    23  */

    23  */

    24 

    31 

    25 // The SplitWord construct allows us to colocate the contention queue

    32 // The SplitWord construct allows us to colocate the contention queue

    26 // (cxq) with the lock-byte.  The queue elements are ParkEvents, which are

    33 // (cxq) with the lock-byte.  The queue elements are ParkEvents, which are

    27 // always aligned on 256-byte addresses - the least significant byte of

    34 // always aligned on 256-byte addresses - the least significant byte of

    28 // a ParkEvent is always 0.  Colocating the lock-byte with the queue

    35 // a ParkEvent is always 0.  Colocating the lock-byte with the queue

   263      ShouldNotReachHere() ;

   270      ShouldNotReachHere() ;

   264      return false ;

   271      return false ;

   265    }

   272    }

   266 };

   273 };

   267 

   274