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/*
* Copyright (c) 1997, 2000, 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.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*
*/
// Data structure for holding monitors for one activation during
// deoptimization.
class MonitorChunk: public CHeapObj {
private:
int _number_of_monitors;
BasicObjectLock* _monitors;
BasicObjectLock* monitors() const { return _monitors; }
MonitorChunk* _next;
public:
// Constructor
MonitorChunk(int number_on_monitors);
~MonitorChunk();
// link operations
MonitorChunk* next() const { return _next; }
void set_next(MonitorChunk* next) { _next = next; }
// Tells whether the monitor chunk is linked into the JavaThread
bool is_linked() const { return next() != NULL; }
// Returns the number of monitors
int number_of_monitors() const { return _number_of_monitors; }
// Returns the index'th monitor
BasicObjectLock* at(int index) { assert(index >= 0 && index < number_of_monitors(), "out of bounds check"); return &monitors()[index]; }
// Memory management
void oops_do(OopClosure* f);
// Tells whether the addr point into the monitors.
bool contains(void* addr) const { return (addr >= (void*) monitors()) && (addr < (void*) (monitors() + number_of_monitors())); }
};
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