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chb.cpp
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3  * Main authors:
4  * Christian Schulte <schulte@gecode.org>
5  *
6  * Copyright:
7  * Christian Schulte, 2017
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10  * $Date: 2017-02-28 08:29:39 +0100 (Tue, 28 Feb 2017) $ by $Author: schulte $
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37 
38 #include <gecode/kernel.hh>
39 
40 namespace Gecode {
41 
42  const CHB CHB::def;
43 
44  CHB::CHB(const CHB& a)
45  : storage(a.storage) {
46  if (storage != NULL) {
47  acquire();
48  storage->use_cnt++;
49  release();
50  }
51  }
52 
53  CHB&
54  CHB::operator =(const CHB& a) {
55  if (storage != a.storage) {
56  if (storage != NULL) {
57  bool done;
58  acquire();
59  done = (--storage->use_cnt == 0);
60  release();
61  if (done)
62  delete storage;
63  }
64  storage = a.storage;
65  if (storage != NULL) {
66  acquire();
67  storage->use_cnt++;
68  release();
69  }
70  }
71  return *this;
72  }
73 
74  CHB::~CHB(void) {
75  if (storage == NULL)
76  return;
77  bool done;
78  acquire();
79  done = (--storage->use_cnt == 0);
80  release();
81  if (done)
82  delete storage;
83  }
84 
85  void
86  CHB::update(Space&, bool, CHB& a) {
87  const_cast<CHB&>(a).acquire();
88  storage = a.storage;
89  storage->use_cnt++;
90  const_cast<CHB&>(a).release();
91  }
92 
93 }
94 
95 // STATISTICS: kernel-branch
CHB & operator=(const CHB &a)
Assignment operator.
Definition: chb.cpp:54
unsigned int use_cnt
How many references exist for this object.
Definition: chb.hpp:68
void update(int i)
Update chb value at position i.
Computation spaces.
Definition: core.hpp:1748
void acquire(void)
Acquire mutex.
Definition: chb.hpp:334
CHB(void)
Construct as not yet intialized.
Definition: chb.hpp:351
struct Gecode::@579::NNF::@61::@63 a
For atomic nodes.
Class for CHB management.
Definition: chb.hpp:50
~CHB(void)
Destructor.
Definition: chb.cpp:74
void release(void)
Release mutex.
Definition: chb.hpp:338
static const CHB def
Default (empty) chb information.
Definition: chb.hpp:128
Storage * storage
Pointer to storage object.
Definition: chb.hpp:89
Gecode toplevel namespace