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action.cpp
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1 /* -*- mode: C++; c-basic-offset: 2; indent-tabs-mode: nil -*- */
2 /*
3  * Main authors:
4  * Christian Schulte <schulte@gecode.org>
5  *
6  * Copyright:
7  * Christian Schulte, 2012
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33 
34 #include <gecode/kernel.hh>
35 
36 namespace Gecode {
37 
38  Support::Mutex Action::Storage::m;
39 
41  heap.free<double>(a,n);
42  }
43 
44  const Action Action::def;
45 
47  : SharedHandle(a) {}
48 
49  Action&
51  (void) SharedHandle::operator =(a);
52  return *this;
53  }
54 
55  Action::~Action(void) {}
56 
57  void
58  Action::decay(Space&, double d) {
59  if ((d < 0.0) || (d > 1.0))
60  throw IllegalDecay("Action");
61  acquire();
62  object().invd = 1.0 / d;
63  release();
64  }
65 
66  double
67  Action::decay(const Space&) const {
68  double d;
69  const_cast<Action*>(this)->acquire();
70  d = 1.0 / object().invd;
71  const_cast<Action*>(this)->release();
72  return d;
73  }
74 
75 }
76 
77 // STATISTICS: kernel-branch
double * a
Action values (more follow)
Definition: action.hpp:56
The shared handle.
Action(void)
Construct as not yet intialized.
Definition: action.hpp:323
~Action(void)
Destructor.
Definition: action.cpp:55
Storage & object(void) const
Return object of correct type.
Definition: action.hpp:290
void acquire(void)
Acquire mutex.
Definition: action.hpp:313
void release(void)
Release mutex.
Definition: action.hpp:317
Computation spaces.
Definition: core.hpp:1701
Gecode::IntSet d(v, 7)
static Support::Mutex m
Mutex to synchronize globally shared access.
Definition: action.hpp:50
int n
Number of action values.
Definition: action.hpp:52
void decay(Space &home, double d)
Set decay factor to d.
Definition: action.cpp:58
double invd
Inverse decay factor.
Definition: action.hpp:54
~Storage(void)
Delete object.
Definition: action.cpp:40
void free(T *b, long unsigned int n)
Delete n objects starting at b.
Definition: heap.hpp:457
Heap heap
The single global heap.
Definition: heap.cpp:44
Action & operator=(const Action &a)
Assignment operator.
Definition: action.cpp:50
static const Action def
Default (empty) action information.
Definition: action.hpp:103
Gecode toplevel namespace
Class for action management.
Definition: action.hpp:42
Exception: illegal decay factor
Definition: exception.hpp:107
struct Gecode::@593::NNF::@62::@64 a
For atomic nodes.