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46 lines
1.6 KiB
C++
46 lines
1.6 KiB
C++
/*
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* Copyright (c) 2022, 2025, 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_THREADIDENTIFIER_HPP
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#define SHARE_RUNTIME_THREADIDENTIFIER_HPP
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#include "memory/allStatic.hpp"
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/*
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* Provides unique monotonic identifiers for threads.
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*
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* Java uses unsafe to initialize the tid field for Thread and VirtualThread on construction.
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* JFR uses next() for a non-reusable id for non-java threads.
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*/
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class ThreadIdentifier : AllStatic {
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public:
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static int64_t next();
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static int64_t current();
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static int64_t unsafe_offset();
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static int64_t initial();
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static void verify_id(int64_t id) NOT_DEBUG_RETURN;
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};
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#endif // SHARE_RUNTIME_THREADIDENTIFIER_HPP
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