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/*
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* Copyright (c) 2016, 2018, 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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#include "precompiled.hpp"
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#include "jfr/recorder/stringpool/jfrStringPoolBuffer.hpp"
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#include "runtime/atomic.hpp"
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#include "runtime/orderAccess.inline.hpp"
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#include "runtime/thread.inline.hpp"
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JfrStringPoolBuffer::JfrStringPoolBuffer() : JfrBuffer(), _string_count_pos(0), _string_count_top(0) {}
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void JfrStringPoolBuffer::reinitialize() {
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concurrent_top();
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set_pos((start()));
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set_string_pos(0);
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set_string_top(0);
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set_concurrent_top(start());
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}
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uint64_t JfrStringPoolBuffer::string_pos() const {
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return OrderAccess::load_acquire(&_string_count_pos);
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}
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uint64_t JfrStringPoolBuffer::string_top() const {
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return OrderAccess::load_acquire(&_string_count_top);
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}
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uint64_t JfrStringPoolBuffer::string_count() const {
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return string_pos() - string_top();
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}
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void JfrStringPoolBuffer::set_string_pos(uint64_t value) {
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Atomic::store(value, &_string_count_pos);
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}
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void JfrStringPoolBuffer::increment(uint64_t value) {
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Atomic::add(value, &_string_count_pos);
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}
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void JfrStringPoolBuffer::set_string_top(uint64_t value) {
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Atomic::store(value, &_string_count_top);
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}
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