Jip J. Dekker
981be2067e
git-subtree-dir: software/gecode_on_replay git-subtree-split: 8051d92b9c89e49cccfbd1c201371580d7703ab4
90 lines
3.0 KiB
C++
90 lines
3.0 KiB
C++
/* -*- 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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* 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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/// Check whether \a p is marked
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bool marked(void* p);
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/// Return marked pointer for unmarked pointer \a p
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void* mark(void* p);
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/// Return unmarked pointer for a marked pointer \a p
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void* unmark(void* p);
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/// Return marked pointer for \a p (possibly already marked)
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void* fmark(void* p);
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/// Return unmarked pointer for a possibly marked pointer \a p
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void* funmark(void* p);
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/// Split possibly marked pointer \a p into mark \a m and unmarked pointer
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void* ptrsplit(void* p, ptrdiff_t& m);
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/// Join unmarked pointer \a p and \a m into marked pointer
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void* ptrjoin(void* p, ptrdiff_t m);
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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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forceinline void*
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ptrsplit(void* p, ptrdiff_t& m) {
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ptrdiff_t mp = reinterpret_cast<ptrdiff_t>(p);
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m = mp & 1;
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return reinterpret_cast<void*>(mp & ~static_cast<ptrdiff_t>(1));
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}
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forceinline void*
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ptrjoin(void* p, ptrdiff_t m) {
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return reinterpret_cast<void*>(reinterpret_cast<ptrdiff_t>(p) | m);
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}
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}}
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// STATISTICS: support-any
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