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