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1.8.16
gecode
kernel
data
rnd.cpp
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/* -*- mode: C++; c-basic-offset: 2; indent-tabs-mode: nil -*- */
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/*
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* Main authors:
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* Christian Schulte <schulte@gecode.org>
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* Mikael Lagerkvist <lagerkvist@gecode.org>
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*
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* Copyright:
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* Christian Schulte, 2008
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* Mikael Lagerkvist, 2008
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*
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* This file is part of Gecode, the generic constraint
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* development environment:
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* http://www.gecode.org
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*
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sublicense, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*
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*/
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#include <
gecode/kernel.hh
>
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namespace
Gecode
{
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Support::Mutex Rnd::IMP::m;
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forceinline
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Rnd::IMP::IMP(
unsigned
int
s)
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: rg(s) {}
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Rnd::IMP::~IMP(
void
) {}
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forceinline
void
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Rnd::_seed(
unsigned
int
s) {
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if
(
object
() == NULL) {
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object
(
new
IMP(s));
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}
else
{
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static_cast<IMP*>(
object
())->seed(s);
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}
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}
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Rnd::Rnd
(
void
) {}
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Rnd::Rnd
(
unsigned
int
s) {
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object
(
new
IMP(s));
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}
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Rnd::Rnd
(
const
Rnd
&
r
)
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:
SharedHandle
(
r
) {}
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Rnd
&
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Rnd::operator =
(
const
Rnd
&
r
) {
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(void) SharedHandle::operator =(
r
);
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return
*
this
;
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}
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Rnd::~Rnd
(
void
) {}
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void
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Rnd::seed
(
unsigned
int
s) {
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_seed(s);
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}
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void
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Rnd::time
(
void
) {
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_seed(static_cast<unsigned int>(::
time
(NULL)));
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}
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void
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Rnd::hw
(
void
) {
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_seed(
Support::hwrnd
());
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}
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}
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// STATISTICS: kernel-other
kernel.hh
Gecode::Rnd::Rnd
Rnd(void)
Default constructor that does not initialize the generator.
Definition:
rnd.cpp:57
Gecode::Rnd::~Rnd
~Rnd(void)
Destructor.
Definition:
rnd.cpp:68
Gecode::SharedHandle::object
SharedHandle::Object * object(void) const
Access to the shared object.
Definition:
shared-object.hpp:102
Gecode::Rnd::operator=
Rnd & operator=(const Rnd &r)
Assignment operator.
Definition:
rnd.cpp:64
Gecode::Support::hwrnd
unsigned int hwrnd(void)
Return hardware generated random number.
Definition:
hw-rnd.cpp:59
Gecode::Rnd::seed
unsigned int seed(void) const
Return current seed.
Definition:
rnd.hpp:120
Gecode
Gecode toplevel namespace
Gecode::r
Post propagator for SetVar SetOpType SetVar SetRelType r
Definition:
set.hh:767
Gecode::Rnd
Random number generator.
Definition:
rnd.hpp:42
Gecode::Rnd::hw
void hw(void)
Set current seed to hardware-based random number (initializes if needed)
Definition:
rnd.cpp:79
forceinline
#define forceinline
Definition:
config.hpp:185
Gecode::SharedHandle
The shared handle.
Definition:
shared-object.hpp:46
Gecode::Rnd::time
void time(void)
Set current seed based on time (initializes if needed)
Definition:
rnd.cpp:75