Mercurial > hg > graal-compiler
view src/share/vm/memory/memRegion.hpp @ 731:aa92a90b1cc6
6833951: Extra ":" Causes Testcase in CR 6589834 "Parse Exception: Invalid tag: summary:"
Summary: Remove the colon
Reviewed-by: never
author | cfang |
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date | Fri, 24 Apr 2009 09:14:39 -0700 |
parents | a61af66fc99e |
children | c18cbe5936b8 |
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/* * Copyright 2000-2004 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, * CA 95054 USA or visit www.sun.com if you need additional information or * have any questions. * */ // A very simple data structure representing a contigous region // region of address space. // Note that MemRegions are passed by value, not by reference. // The intent is that they remain very small and contain no // objects. class MemRegion VALUE_OBJ_CLASS_SPEC { friend class VMStructs; private: HeapWord* _start; size_t _word_size; public: MemRegion() : _start(NULL), _word_size(0) {}; MemRegion(HeapWord* start, size_t word_size) : _start(start), _word_size(word_size) {}; MemRegion(HeapWord* start, HeapWord* end) : _start(start), _word_size(pointer_delta(end, start)) { assert(end >= start, "incorrect constructor arguments"); } MemRegion(const MemRegion& mr): _start(mr._start), _word_size(mr._word_size) {} MemRegion intersection(const MemRegion mr2) const; // regions must overlap or be adjacent MemRegion _union(const MemRegion mr2) const; // minus will fail a guarantee if mr2 is interior to this, // since there's no way to return 2 disjoint regions. MemRegion minus(const MemRegion mr2) const; HeapWord* start() const { return _start; } HeapWord* end() const { return _start + _word_size; } HeapWord* last() const { return _start + _word_size - 1; } void set_start(HeapWord* start) { _start = start; } void set_end(HeapWord* end) { _word_size = pointer_delta(end, _start); } void set_word_size(size_t word_size) { _word_size = word_size; } bool contains(const MemRegion mr2) const { return _start <= mr2._start && end() >= mr2.end(); } bool contains(const void* addr) const { return addr >= (void*)_start && addr < (void*)end(); } bool equals(const MemRegion mr2) const { // first disjunct since we do not have a canonical empty set return ((is_empty() && mr2.is_empty()) || (start() == mr2.start() && end() == mr2.end())); } size_t byte_size() const { return _word_size * sizeof(HeapWord); } size_t word_size() const { return _word_size; } bool is_empty() const { return word_size() == 0; } }; // For iteration over MemRegion's. class MemRegionClosure : public StackObj { public: virtual void do_MemRegion(MemRegion mr) = 0; }; // A ResourceObj version of MemRegionClosure class MemRegionClosureRO: public MemRegionClosure { public: void* operator new(size_t size, ResourceObj::allocation_type type) { return ResourceObj::operator new(size, type); } void* operator new(size_t size, Arena *arena) { return ResourceObj::operator new(size, arena); } void* operator new(size_t size) { return ResourceObj::operator new(size); } void operator delete(void* p) {} // nothing to do };