8204210: Implementation: JEP 333: ZGC: A Scalable Low-Latency Garbage Collector (Experimental)
Reviewed-by: pliden, stefank, eosterlund, ehelin, sjohanss, rbackman, coleenp, ihse, jgeorge, lmesnik, rkennke
Contributed-by: per.liden@oracle.com, stefan.karlsson@oracle.com, erik.osterlund@oracle.com, mikael.gerdin@oracle.com, kim.barrett@oracle.com, nils.eliasson@oracle.com, rickard.backman@oracle.com, rwestrel@redhat.com, coleen.phillimore@oracle.com, robbin.ehn@oracle.com, gerard.ziemski@oracle.com, hugh.wilkinson@intel.com, sandhya.viswanathan@intel.com, bill.npo.wheeler@intel.com, vinay.k.awasthi@intel.com, yasuenag@gmail.com
/*
* Copyright (c) 2017, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
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#ifndef SHARE_GC_Z_ZRELOCATIONSET_INLINE_HPP
#define SHARE_GC_Z_ZRELOCATIONSET_INLINE_HPP
#include "gc/z/zRelocationSet.hpp"
#include "runtime/atomic.hpp"
template <bool parallel>
inline ZRelocationSetIteratorImpl<parallel>::ZRelocationSetIteratorImpl(ZRelocationSet* relocation_set) :
_relocation_set(relocation_set),
_next(0) {}
template <bool parallel>
inline bool ZRelocationSetIteratorImpl<parallel>::next(ZPage** page) {
const size_t npages = _relocation_set->_npages;
if (parallel) {
if (_next < npages) {
const size_t next = Atomic::add(1u, &_next) - 1u;
if (next < npages) {
*page = _relocation_set->_pages[next];
return true;
}
}
} else {
if (_next < npages) {
*page = _relocation_set->_pages[_next++];
return true;
}
}
return false;
}
#endif // SHARE_GC_Z_ZRELOCATIONSET_INLINE_HPP