8233061: ZGC: Enforce memory ordering in segmented bit maps
Reviewed-by: pliden, stefank
/*
* Copyright (c) 2015, 2017, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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* 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).
*
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* 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_ZUTILS_HPP
#define SHARE_GC_Z_ZUTILS_HPP
#include "memory/allocation.hpp"
class ZUtils : public AllStatic {
public:
// Allocation
static uintptr_t alloc_aligned(size_t alignment, size_t size);
// Power of two
static size_t round_up_power_of_2(size_t value);
static size_t round_down_power_of_2(size_t value);
// Size conversion
static size_t bytes_to_words(size_t size_in_words);
static size_t words_to_bytes(size_t size_in_words);
// Object
static size_t object_size(uintptr_t addr);
static void object_copy(uintptr_t from, uintptr_t to, size_t size);
};
#endif // SHARE_GC_Z_ZUTILS_HPP