e7af7a4aef
Co-authored-by: Stefan Karlsson <stefan.karlsson@oracle.com> Co-authored-by: Erik Osterlund <erik.osterlund@oracle.com> Co-authored-by: Mikael Gerdin <mikael.gerdin@oracle.com> Co-authored-by: Kim Barrett <kim.barrett@oracle.com> Co-authored-by: Nils Eliasson <nils.eliasson@oracle.com> Co-authored-by: Rickard Backman <rickard.backman@oracle.com> Co-authored-by: Roland Westrelin <rwestrel@redhat.com> Co-authored-by: Coleen Phillimore <coleen.phillimore@oracle.com> Co-authored-by: Robbin Ehn <robbin.ehn@oracle.com> Co-authored-by: Gerard Ziemski <gerard.ziemski@oracle.com> Co-authored-by: Hugh Wilkinson <hugh.wilkinson@intel.com> Co-authored-by: Sandhya Viswanathan <sandhya.viswanathan@intel.com> Co-authored-by: Bill Wheeler <bill.npo.wheeler@intel.com> Co-authored-by: Vinay K. Awasthi <vinay.k.awasthi@intel.com> Co-authored-by: Yasumasa Suenaga <yasuenag@gmail.com> Reviewed-by: pliden, stefank, eosterlund, ehelin, sjohanss, rbackman, coleenp, ihse, jgeorge, lmesnik, rkennke
46 lines
2.0 KiB
C++
46 lines
2.0 KiB
C++
/*
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* Copyright (c) 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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#ifndef SHARE_GC_SHARED_GCTHREADLOCALDATA_HPP
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#define SHARE_GC_SHARED_GCTHREADLOCALDATA_HPP
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#include "utilities/globalDefinitions.hpp"
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// Thread local data area for GC-specific information. Each GC
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// is free to decide the internal structure and contents of this
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// area. It is represented as a 64-bit aligned opaque blob to
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// avoid circular dependencies between Thread and all GCs. For
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// the same reason, the size of the data area is hard coded to
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// provide enough space for all current GCs. Adjust the size if
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// needed, but avoid making it excessively large as it adds to
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// the memory overhead of creating a thread.
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//
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// Use Thread::gc_data<T>() to access the data, where T is the
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// GC-specific type describing the structure of the data. GCs
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// should consider placing frequently accessed fields first in
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// T, so that field offsets relative to Thread are small, which
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// often allows for a more compact instruction encoding.
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typedef uint64_t GCThreadLocalData[18]; // 144 bytes
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#endif // SHARE_GC_SHARED_GCTHREADLOCALDATA_HPP
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