Mercurial > hg > graal-jvmci-8
view src/share/vm/utilities/chunkedList.hpp @ 22973:340ca8812af9
8067469: G1 ignores AlwaysPreTouch
Summary: Factor out pretouch code of the various virtual space management classes and use them everywhere including in G1.
Reviewed-by: stefank, ehelin, dholmes
author | tschatzl |
---|---|
date | Thu, 18 Dec 2014 09:37:02 +0100 |
parents | b12a2a9b05ca |
children |
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/* * Copyright (c) 2014, 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. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. * */ #ifndef SHARE_VM_UTILITIES_CHUNKED_LIST_HPP #define SHARE_VM_UTILITIES_CHUNKED_LIST_HPP #include "memory/allocation.hpp" #include "utilities/debug.hpp" template <class T, MEMFLAGS F> class ChunkedList : public CHeapObj<F> { template <class U> friend class TestChunkedList; static const size_t BufferSize = 64; T _values[BufferSize]; T* _top; ChunkedList<T, F>* _next_used; ChunkedList<T, F>* _next_free; T const * end() const { return &_values[BufferSize]; } public: ChunkedList<T, F>() : _top(_values), _next_used(NULL), _next_free(NULL) {} bool is_full() const { return _top == end(); } void clear() { _top = _values; // Don't clear the next pointers since that would interfere // with other threads trying to iterate through the lists. } void push(T m) { assert(!is_full(), "Buffer is full"); *_top = m; _top++; } void set_next_used(ChunkedList<T, F>* buffer) { _next_used = buffer; } void set_next_free(ChunkedList<T, F>* buffer) { _next_free = buffer; } ChunkedList<T, F>* next_used() const { return _next_used; } ChunkedList<T, F>* next_free() const { return _next_free; } size_t size() const { return pointer_delta(_top, _values, sizeof(T)); } T at(size_t i) { assert(i < size(), err_msg("IOOBE i: " SIZE_FORMAT " size(): " SIZE_FORMAT, i, size())); return _values[i]; } }; #endif // SHARE_VM_UTILITIES_CHUNKED_LIST_HPP