author | mgronlun |
Mon, 28 Oct 2019 18:43:04 +0100 | |
branch | JEP-349-branch |
changeset 58823 | 6a21dba79b81 |
parent 58112 | e7754025004b |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2016, 2019, 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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||
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#include "precompiled.hpp" |
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#include "jfr/recorder/checkpoint/types/traceid/jfrTraceIdEpoch.hpp" |
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#include "runtime/safepoint.hpp" |
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// Alternating epochs on each rotation allow for concurrent tagging. |
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// The epoch shift happens only during a safepoint. |
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bool JfrTraceIdEpoch::_epoch_state = false; |
57983
a57907813a83
old object sample blob:ification and serialization support
mgronlun
parents:
57873
diff
changeset
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bool volatile JfrTraceIdEpoch::_tag_state = false; |
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void JfrTraceIdEpoch::shift_epoch() { |
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assert(SafepointSynchronize::is_at_safepoint(), "invariant"); |
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_epoch_state = !_epoch_state; |
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} |