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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
8 *
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33
34#include <gecode/kernel.hh>
35
36namespace Gecode {
37
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
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 invd
Inverse decay factor.
Definition action.hpp:54
double * a
Action values (more follow)
Definition action.hpp:56
static Support::Mutex m
Mutex to synchronize globally shared access.
Definition action.hpp:50
~Storage(void)
Delete object.
Definition action.cpp:40
int n
Number of action values.
Definition action.hpp:52
Class for action management.
Definition action.hpp:42
Storage & object(void) const
Return object of correct type.
Definition action.hpp:290
Action & operator=(const Action &a)
Assignment operator.
Definition action.cpp:50
void acquire(void)
Acquire mutex.
Definition action.hpp:313
void release(void)
Release mutex.
Definition action.hpp:317
static const Action def
Default (empty) action information.
Definition action.hpp:103
Action(void)
Construct as not yet intialized.
Definition action.hpp:323
~Action(void)
Destructor.
Definition action.cpp:55
void decay(Space &home, double d)
Set decay factor to d.
Definition action.cpp:58
Exception: illegal decay factor
SharedHandle(void)
Create shared handle with no object pointing to.
Computation spaces.
Definition core.hpp:1744
A mutex for mutual exclausion among several threads.
Definition thread.hpp:96
Heap heap
The single global heap.
Definition heap.cpp:44
Gecode toplevel namespace