| /* |
| * Copyright (c) 1997, 2012, 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. |
| * |
| */ |
| |
| #ifndef SHARE_VM_RUNTIME_MONITORCHUNK_HPP |
| #define SHARE_VM_RUNTIME_MONITORCHUNK_HPP |
| |
| #include "runtime/synchronizer.hpp" |
| |
| // Data structure for holding monitors for one activation during |
| // deoptimization. |
| |
| class MonitorChunk: public CHeapObj<mtInternal> { |
| 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())); } |
| }; |
| |
| #endif // SHARE_VM_RUNTIME_MONITORCHUNK_HPP |