duke@435: /*
mikael@4153:  * Copyright (c) 1997, 2012, Oracle and/or its affiliates. All rights reserved.
duke@435:  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
duke@435:  *
duke@435:  * This code is free software; you can redistribute it and/or modify it
duke@435:  * under the terms of the GNU General Public License version 2 only, as
duke@435:  * published by the Free Software Foundation.
duke@435:  *
duke@435:  * This code is distributed in the hope that it will be useful, but WITHOUT
duke@435:  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
duke@435:  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
duke@435:  * version 2 for more details (a copy is included in the LICENSE file that
duke@435:  * accompanied this code).
duke@435:  *
duke@435:  * You should have received a copy of the GNU General Public License version
duke@435:  * 2 along with this work; if not, write to the Free Software Foundation,
duke@435:  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
duke@435:  *
trims@1907:  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
trims@1907:  * or visit www.oracle.com if you need additional information or have any
trims@1907:  * questions.
duke@435:  *
duke@435:  */
duke@435: 
stefank@2314: #ifndef SHARE_VM_RUNTIME_MONITORCHUNK_HPP
stefank@2314: #define SHARE_VM_RUNTIME_MONITORCHUNK_HPP
stefank@2314: 
stefank@2314: #include "runtime/synchronizer.hpp"
stefank@2314: 
duke@435: // Data structure for holding monitors for one activation during
duke@435: // deoptimization.
duke@435: 
zgu@3900: class MonitorChunk: public CHeapObj<mtInternal> {
duke@435:  private:
duke@435:   int              _number_of_monitors;
duke@435:   BasicObjectLock* _monitors;
duke@435:   BasicObjectLock* monitors() const { return _monitors; }
duke@435:   MonitorChunk*    _next;
duke@435:  public:
duke@435:   // Constructor
duke@435:   MonitorChunk(int number_on_monitors);
duke@435:   ~MonitorChunk();
duke@435: 
duke@435:   // link operations
duke@435:   MonitorChunk* next() const                { return _next; }
duke@435:   void set_next(MonitorChunk* next)         { _next = next; }
duke@435: 
duke@435:   // Tells whether the monitor chunk is linked into the JavaThread
duke@435:   bool is_linked() const                    { return next() != NULL; }
duke@435: 
duke@435:   // Returns the number of monitors
duke@435:   int number_of_monitors() const { return _number_of_monitors; }
duke@435: 
duke@435:   // Returns the index'th monitor
duke@435:   BasicObjectLock* at(int index)            { assert(index >= 0 && index < number_of_monitors(), "out of bounds check"); return &monitors()[index]; }
duke@435: 
duke@435: 
duke@435:   // Memory management
duke@435:   void oops_do(OopClosure* f);
duke@435: 
duke@435:   // Tells whether the addr point into the monitors.
duke@435:   bool contains(void* addr) const           { return (addr >= (void*) monitors()) && (addr <  (void*) (monitors() + number_of_monitors())); }
duke@435: };
stefank@2314: 
stefank@2314: #endif // SHARE_VM_RUNTIME_MONITORCHUNK_HPP