author | pliden |
Mon, 18 Mar 2019 11:50:40 +0100 | |
changeset 54170 | 8f1771ea1e39 |
parent 51395 | f3cf91d5373f |
child 58811 | 38f4701d6587 |
permissions | -rw-r--r-- |
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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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#ifndef SHARE_GC_Z_ZMARKSTACKALLOCATOR_HPP |
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#define SHARE_GC_Z_ZMARKSTACKALLOCATOR_HPP |
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#include "gc/z/zGlobals.hpp" |
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#include "gc/z/zLock.hpp" |
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#include "utilities/globalDefinitions.hpp" |
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class ZMarkStackSpace { |
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private: |
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ZLock _expand_lock; |
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uintptr_t _start; |
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volatile uintptr_t _top; |
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volatile uintptr_t _end; |
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void expand(); |
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uintptr_t alloc_space(size_t size); |
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uintptr_t expand_and_alloc_space(size_t size); |
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public: |
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ZMarkStackSpace(); |
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bool is_initialized() const; |
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uintptr_t alloc(size_t size); |
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}; |
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class ZMarkStackAllocator { |
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private: |
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ZMarkStackMagazineList _freelist ATTRIBUTE_ALIGNED(ZCacheLineSize); |
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ZMarkStackSpace _space ATTRIBUTE_ALIGNED(ZCacheLineSize); |
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void prime_freelist(); |
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ZMarkStackMagazine* create_magazine_from_space(uintptr_t addr, size_t size); |
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public: |
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ZMarkStackAllocator(); |
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bool is_initialized() const; |
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ZMarkStackMagazine* alloc_magazine(); |
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void free_magazine(ZMarkStackMagazine* magazine); |
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}; |
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#endif // SHARE_GC_Z_ZMARKSTACKALLOCATOR_HPP |