7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  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
  21  * questions.
  22  *
  23  */
  24 
  25 #include "precompiled.hpp"
  26 #include "runtime/atomic.hpp"
  27 #include "runtime/interfaceSupport.hpp"
  28 #include "runtime/mutex.hpp"
  29 #include "runtime/orderAccess.inline.hpp"
  30 #include "runtime/osThread.hpp"
  31 #include "runtime/safepointMechanism.inline.hpp"
  32 #include "runtime/thread.inline.hpp"
  33 #include "utilities/events.hpp"
  34 #include "utilities/macros.hpp"
  35 
  36 // o-o-o-o-o-o-o-o-o-o-o-o-o-o-o-o-o-o-o-o-o-o-o-o-o-o-o-o-o-o-o-o-o-o-o-o-o-o-o-o
  37 //
  38 // Native Monitor-Mutex locking - theory of operations
  39 //
  40 // * Native Monitors are completely unrelated to Java-level monitors,
  41 //   although the "back-end" slow-path implementations share a common lineage.
  42 //   See objectMonitor:: in synchronizer.cpp.
  43 //   Native Monitors do *not* support nesting or recursion but otherwise
  44 //   they're basically Hoare-flavor monitors.
  45 //
  46 // * A thread acquires ownership of a Monitor/Mutex by CASing the LockByte
  47 //   in the _LockWord from zero to non-zero.  Note that the _Owner field

   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  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
  21  * questions.
  22  *
  23  */
  24 
  25 #include "precompiled.hpp"
  26 #include "runtime/atomic.hpp"
  27 #include "runtime/interfaceSupport.inline.hpp"
  28 #include "runtime/mutex.hpp"
  29 #include "runtime/orderAccess.inline.hpp"
  30 #include "runtime/osThread.hpp"
  31 #include "runtime/safepointMechanism.inline.hpp"
  32 #include "runtime/thread.inline.hpp"
  33 #include "utilities/events.hpp"
  34 #include "utilities/macros.hpp"
  35 
  36 // o-o-o-o-o-o-o-o-o-o-o-o-o-o-o-o-o-o-o-o-o-o-o-o-o-o-o-o-o-o-o-o-o-o-o-o-o-o-o-o
  37 //
  38 // Native Monitor-Mutex locking - theory of operations
  39 //
  40 // * Native Monitors are completely unrelated to Java-level monitors,
  41 //   although the "back-end" slow-path implementations share a common lineage.
  42 //   See objectMonitor:: in synchronizer.cpp.
  43 //   Native Monitors do *not* support nesting or recursion but otherwise
  44 //   they're basically Hoare-flavor monitors.
  45 //
  46 // * A thread acquires ownership of a Monitor/Mutex by CASing the LockByte
  47 //   in the _LockWord from zero to non-zero.  Note that the _Owner field