action.cpp
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/* -*- mode: C++; c-basic-offset: 2; indent-tabs-mode: nil -*- */
/*
* Main authors:
* Christian Schulte <schulte@gecode.org>
*
* Copyright:
* Christian Schulte, 2012
*
* 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 <gecode/kernel.hh>
namespace Gecode {
Support::Mutex Action::Storage::m;
Action::Storage::~Storage(void) {
heap.free<double>(a,n);
}
const Action Action::def;
Action::Action(const Action& a)
: SharedHandle(a) {}
Action&
Action::operator =(const Action& a) {
(void) SharedHandle::operator =(a);
return *this;
}
Action::~Action(void) {}
void
Action::decay(Space&, double d) {
if ((d < 0.0) || (d > 1.0))
throw IllegalDecay("Action");
acquire();
object().invd = 1.0 / d;
release();
}
double
Action::decay(const Space&) const {
double d;
const_cast<Action*>(this)->acquire();
d = 1.0 / object().invd;
const_cast<Action*>(this)->release();
return d;
}
}
// STATISTICS: kernel-branch
Gecode::Action::Storage::invd
double invd
Inverse decay factor.
Definition action.hpp:54
Gecode::Action::Storage::a
double * a
Action values (more follow).
Definition action.hpp:56
Gecode::Action::Storage::m
static Support::Mutex m
Mutex to synchronize globally shared access.
Definition action.hpp:50
Gecode::Action::Storage::~Storage
~Storage(void)
Delete object.
Definition action.cpp:40
Gecode::Action::Storage::n
int n
Number of action values.
Definition action.hpp:52
Gecode::Action
Class for action management.
Definition action.hpp:42
Gecode::Action::object
Storage & object(void) const
Return object of correct type.
Definition action.hpp:290
Gecode::Action::operator=
Action & operator=(const Action &a)
Assignment operator.
Definition action.cpp:50
Gecode::Action::acquire
void acquire(void)
Acquire mutex.
Definition action.hpp:313
Gecode::Action::release
void release(void)
Release mutex.
Definition action.hpp:317
Gecode::Action::def
static const Action def
Default (empty) action information.
Definition action.hpp:103
Gecode::Action::Action
Action(void)
Construct as not yet intialized.
Definition action.hpp:323
Gecode::Action::~Action
~Action(void)
Destructor.
Definition action.cpp:55
Gecode::Action::decay
void decay(Space &home, double d)
Set decay factor to d.
Definition action.cpp:58
Gecode::IllegalDecay
Exception: illegal decay factor
Definition exception.hpp:107
Gecode::SharedHandle::SharedHandle
SharedHandle(void)
Create shared handle with no object pointing to.
Definition shared-object.hpp:122
Gecode::Space
Computation spaces.
Definition core.hpp:1742
Gecode::Support::Mutex
A mutex for mutual exclausion among several threads.
Definition thread.hpp:96
Gecode::heap
Heap heap
The single global heap.
Definition heap.cpp:44
kernel.hh
Gecode
Gecode toplevel namespace