rnd.cpp
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/* -*- mode: C++; c-basic-offset: 2; indent-tabs-mode: nil -*- */
/*
* Main authors:
* Christian Schulte <schulte@gecode.org>
* Mikael Lagerkvist <lagerkvist@gecode.org>
*
* Copyright:
* Christian Schulte, 2008
* Mikael Lagerkvist, 2008
*
* 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 Rnd::IMP::m;
forceinline
Rnd::IMP::IMP(unsigned int s)
: rg(s) {}
Rnd::IMP::~IMP(void) {}
forceinline void
Rnd::_seed(unsigned int s) {
if (object() == NULL) {
object(new IMP(s));
} else {
static_cast<IMP*>(object())->seed(s);
}
}
Rnd::Rnd(void) {}
Rnd::Rnd(unsigned int s) {
object(new IMP(s));
}
Rnd::Rnd(const Rnd& r)
: SharedHandle(r) {}
Rnd&
Rnd::operator =(const Rnd& r) {
(void) SharedHandle::operator =(r);
return *this;
}
Rnd::~Rnd(void) {}
void
Rnd::seed(unsigned int s) {
_seed(s);
}
void
Rnd::time(void) {
_seed(static_cast<unsigned int>(::time(NULL)));
}
void
Rnd::hw(void) {
_seed(Support::hwrnd());
}
}
// STATISTICS: kernel-other
Gecode::Rnd
Random number generator.
Definition rnd.hpp:42
Gecode::Rnd::seed
unsigned int seed(void) const
Return current seed.
Definition rnd.hpp:120
Gecode::Rnd::operator=
Rnd & operator=(const Rnd &r)
Assignment operator.
Definition rnd.cpp:64
Gecode::Rnd::time
void time(void)
Set current seed based on time (initializes if needed).
Definition rnd.cpp:75
Gecode::Rnd::~Rnd
~Rnd(void)
Destructor.
Definition rnd.cpp:68
Gecode::Rnd::Rnd
Rnd(void)
Default constructor that does not initialize the generator.
Definition rnd.cpp:57
Gecode::Rnd::hw
void hw(void)
Set current seed to hardware-based random number (initializes if needed).
Definition rnd.cpp:79
Gecode::SharedHandle::SharedHandle
SharedHandle(void)
Create shared handle with no object pointing to.
Definition shared-object.hpp:122
Gecode::SharedHandle::object
SharedHandle::Object * object(void) const
Access to the shared object.
Definition shared-object.hpp:102
Gecode::Support::Mutex
A mutex for mutual exclausion among several threads.
Definition thread.hpp:96
kernel.hh
Gecode::Support::hwrnd
unsigned int hwrnd(void)
Return hardware generated random number.
Definition hw-rnd.cpp:59
Gecode
Gecode toplevel namespace
forceinline
#define forceinline
Definition config.hpp:187