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1.8.1.1
gecode
support
marked-pointer.hpp
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/* -*- mode: C++; c-basic-offset: 2; indent-tabs-mode: nil -*- */
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/*
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* Main authors:
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* Christian Schulte <schulte@gecode.org>
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*
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* Copyright:
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* Christian Schulte, 2008
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*
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* Last modified:
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* $Date: 2009-10-16 19:20:59 +1100 (Fri, 16 Oct 2009) $ by $Author: schulte $
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* $Revision: 9936 $
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*
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* This file is part of Gecode, the generic constraint
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* development environment:
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* http://www.gecode.org
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*
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sublicense, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*
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*/
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#include <cstddef>
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namespace
Gecode {
namespace
Support {
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bool
marked
(
void
* p);
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void
*
mark
(
void
* p);
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void
*
unmark
(
void
* p);
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void
*
fmark
(
void
* p);
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void
*
funmark
(
void
* p);
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forceinline
bool
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marked
(
void
* p) {
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return
(reinterpret_cast<ptrdiff_t>(p) & 1) != 0;
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}
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forceinline
void
*
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mark
(
void
* p) {
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assert(!
marked
(p));
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return
reinterpret_cast<
void
*
>
(
reinterpret_cast<
ptrdiff_t
>
(p)+1);
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}
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forceinline
void
*
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unmark
(
void
* p) {
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assert(
marked
(p));
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return
reinterpret_cast<
void
*
>
(
reinterpret_cast<
ptrdiff_t
>
(p)-1);
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}
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forceinline
void
*
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fmark
(
void
* p) {
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return
reinterpret_cast<
void
*
>
(
reinterpret_cast<
ptrdiff_t
>
(p)|1);
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}
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forceinline
void
*
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funmark
(
void
* p) {
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return
reinterpret_cast<
void
*
>
(
reinterpret_cast<
ptrdiff_t
>
(p)&
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~static_cast<ptrdiff_t>(1));
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}
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}}
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// STATISTICS: support-any