/usr/include/gecode/kernel/rnd.hpp is in libgecode-dev 5.1.0-2build1.
This file is owned by root:root, with mode 0o644.
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/*
* Main authors:
* Christian Schulte <schulte@gecode.org>
*
* Copyright:
* Christian Schulte, 2008
*
* Last modified:
* $Date: 2017-03-08 11:58:56 +0100 (Wed, 08 Mar 2017) $ by $Author: schulte $
* $Revision: 15562 $
*
* 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 <ctime>
namespace Gecode {
/**
* \brief Random number generator
* \ingroup TaskModel
*/
class Rnd : public SharedHandle {
private:
/// Implementation of generator
class IMP : public SharedHandle::Object {
public:
/// The actual generator
Support::RandomGenerator rg;
/// Initialize generator with seed \a s
IMP(unsigned int s);
/// Delete implemenentation
virtual ~IMP(void);
/// Create a copy
GECODE_KERNEL_EXPORT
virtual SharedHandle::Object* copy(void) const;
};
/// Set the current seed to \a s (initializes if needed)
void _seed(unsigned int s);
public:
/// Default constructor that does not initialize the generator
GECODE_KERNEL_EXPORT
Rnd(void);
/// Initialize from generator \a r
GECODE_KERNEL_EXPORT
Rnd(const Rnd& r);
/// Assignment operator
GECODE_KERNEL_EXPORT
Rnd& operator =(const Rnd& r);
/// Destructor
GECODE_KERNEL_EXPORT
~Rnd(void);
/// Initialize with seed \a s
GECODE_KERNEL_EXPORT
Rnd(unsigned int s);
/// Set the current seed to \a s (initializes if needed)
GECODE_KERNEL_EXPORT
void seed(unsigned int s);
/// Set current seed based on time (initializes if needed)
GECODE_KERNEL_EXPORT
void time(void);
/// Set current seed to hardware-based random number (initializes if needed)
GECODE_KERNEL_EXPORT
void hw(void);
/// Return current seed
unsigned int seed(void) const;
/// Return a random integer from the interval [0..n)
unsigned int operator ()(unsigned int n);
/// Test whether generator has been properly initialized
operator bool(void) const;
};
forceinline unsigned int
Rnd::seed(void) const {
const IMP* i = static_cast<const IMP*>(object());
return i->rg.seed();
}
forceinline unsigned int
Rnd::operator ()(unsigned int n) {
IMP* i = static_cast<IMP*>(object());
return i->rg(n);
}
forceinline
Rnd::operator bool(void) const {
return object() != NULL;
}
}
// STATISTICS: kernel-other
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