1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/src/share/vm/runtime/monitorChunk.hpp Wed Apr 27 01:25:04 2016 +0800
1.3 @@ -0,0 +1,65 @@
1.4 +/*
1.5 + * Copyright (c) 1997, 2012, Oracle and/or its affiliates. All rights reserved.
1.6 + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
1.7 + *
1.8 + * This code is free software; you can redistribute it and/or modify it
1.9 + * under the terms of the GNU General Public License version 2 only, as
1.10 + * published by the Free Software Foundation.
1.11 + *
1.12 + * This code is distributed in the hope that it will be useful, but WITHOUT
1.13 + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
1.14 + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
1.15 + * version 2 for more details (a copy is included in the LICENSE file that
1.16 + * accompanied this code).
1.17 + *
1.18 + * You should have received a copy of the GNU General Public License version
1.19 + * 2 along with this work; if not, write to the Free Software Foundation,
1.20 + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
1.21 + *
1.22 + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
1.23 + * or visit www.oracle.com if you need additional information or have any
1.24 + * questions.
1.25 + *
1.26 + */
1.27 +
1.28 +#ifndef SHARE_VM_RUNTIME_MONITORCHUNK_HPP
1.29 +#define SHARE_VM_RUNTIME_MONITORCHUNK_HPP
1.30 +
1.31 +#include "runtime/synchronizer.hpp"
1.32 +
1.33 +// Data structure for holding monitors for one activation during
1.34 +// deoptimization.
1.35 +
1.36 +class MonitorChunk: public CHeapObj<mtInternal> {
1.37 + private:
1.38 + int _number_of_monitors;
1.39 + BasicObjectLock* _monitors;
1.40 + BasicObjectLock* monitors() const { return _monitors; }
1.41 + MonitorChunk* _next;
1.42 + public:
1.43 + // Constructor
1.44 + MonitorChunk(int number_on_monitors);
1.45 + ~MonitorChunk();
1.46 +
1.47 + // link operations
1.48 + MonitorChunk* next() const { return _next; }
1.49 + void set_next(MonitorChunk* next) { _next = next; }
1.50 +
1.51 + // Tells whether the monitor chunk is linked into the JavaThread
1.52 + bool is_linked() const { return next() != NULL; }
1.53 +
1.54 + // Returns the number of monitors
1.55 + int number_of_monitors() const { return _number_of_monitors; }
1.56 +
1.57 + // Returns the index'th monitor
1.58 + BasicObjectLock* at(int index) { assert(index >= 0 && index < number_of_monitors(), "out of bounds check"); return &monitors()[index]; }
1.59 +
1.60 +
1.61 + // Memory management
1.62 + void oops_do(OopClosure* f);
1.63 +
1.64 + // Tells whether the addr point into the monitors.
1.65 + bool contains(void* addr) const { return (addr >= (void*) monitors()) && (addr < (void*) (monitors() + number_of_monitors())); }
1.66 +};
1.67 +
1.68 +#endif // SHARE_VM_RUNTIME_MONITORCHUNK_HPP
