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marked-pointer.hpp
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3  * Main authors:
4  * Christian Schulte <schulte@gecode.org>
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7  * Christian Schulte, 2008
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10  * $Date: 2009-10-16 10:20:59 +0200 (Fri, 16 Oct 2009) $ by $Author: schulte $
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37 
38 #include <cstddef>
39 
40 namespace Gecode { namespace Support {
41 
43  bool marked(void* p);
45  void* mark(void* p);
47  void* unmark(void* p);
49  void* fmark(void* p);
51  void* funmark(void* p);
52 
53  forceinline bool
54  marked(void* p) {
55  return (reinterpret_cast<ptrdiff_t>(p) & 1) != 0;
56  }
57  forceinline void*
58  mark(void* p) {
59  assert(!marked(p));
60  return reinterpret_cast<void*>(reinterpret_cast<ptrdiff_t>(p)+1);
61  }
62  forceinline void*
63  unmark(void* p) {
64  assert(marked(p));
65  return reinterpret_cast<void*>(reinterpret_cast<ptrdiff_t>(p)-1);
66  }
67  forceinline void*
68  fmark(void* p) {
69  return reinterpret_cast<void*>(reinterpret_cast<ptrdiff_t>(p)|1);
70  }
71  forceinline void*
72  funmark(void* p) {
73  return reinterpret_cast<void*>(reinterpret_cast<ptrdiff_t>(p)&
74  ~static_cast<ptrdiff_t>(1));
75  }
76 
77 }}
78 
79 // STATISTICS: support-any
bool marked(void *p)
Check whether p is marked.
void * mark(void *p)
Return marked pointer for p.
void * funmark(void *p)
Return unmarked pointer for a possibly marked pointer p.
int p
Number of positive literals for node type.
Definition: bool-expr.cpp:236
void * unmark(void *p)
Return unmarked pointer for a marked pointer p.
#define forceinline
Definition: config.hpp:132
void * fmark(void *p)
Return marked pointer for p (possibly already marked)
Gecode toplevel namespace