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78 lines
2.4 KiB
C++
78 lines
2.4 KiB
C++
/*
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* Copyright (c) 2024, 2026, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*
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*/
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#ifndef SHARE_RUNTIME_OBJECTMONITORTABLE_HPP
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#define SHARE_RUNTIME_OBJECTMONITORTABLE_HPP
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#include "memory/allStatic.hpp"
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#include "oops/oopsHierarchy.hpp"
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#include "runtime/atomic.hpp"
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#include "utilities/globalDefinitions.hpp"
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#include "utilities/sizes.hpp"
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template <typename T> class GrowableArray;
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class JavaThread;
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class ObjectMonitor;
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class ObjectMonitorTableConfig;
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class outputStream;
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class Thread;
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class ObjectMonitorTable : AllStatic {
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static constexpr double GROW_LOAD_FACTOR = 0.125;
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public:
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class Table;
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private:
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static Atomic<Table*> _curr;
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static Table* grow_table(Table* curr);
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enum class Entry : uintptr_t {
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empty = 0,
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tombstone = 1,
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removed = 2,
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below_is_special = (removed + 1)
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};
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public:
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typedef enum {
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// Used in the platform code. See: C2_MacroAssembler::fast_lock().
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below_is_special = (int)Entry::below_is_special
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} SpecialPointerValues;
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static void create();
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static ObjectMonitor* monitor_get(oop obj);
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static ObjectMonitor* monitor_put_get(ObjectMonitor* monitor, oop obj);
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static void rebuild(GrowableArray<Table*>* delete_list);
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static void destroy(GrowableArray<Table*>* delete_list);
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static void remove_monitor_entry(ObjectMonitor* monitor);
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// Compiler support
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static address current_table_address();
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static ByteSize table_capacity_mask_offset();
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static ByteSize table_buckets_offset();
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};
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#endif // SHARE_RUNTIME_OBJECTMONITORTABLE_HPP
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