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at develop
123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184/* -*- mode: C++; c-basic-offset: 2; indent-tabs-mode: nil -*- *//* * Main authors: * Christian Schulte <schulte@gecode.org> * * Copyright: * Christian Schulte, 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 <ctime>
namespace Gecode {
/** * \brief Random number generator * \ingroup TaskModel */ class Rnd : public SharedHandle { private: /// Implementation of generator class IMP : public SharedHandle::Object { protected: /// Mutex for locking GECODE_KERNEL_EXPORT static Support::Mutex m; /// The actual generator Support::RandomGenerator rg; public: /// Initialize generator with seed \a s IMP(unsigned int s); /// Return seed unsigned int seed(void) const; /// Set seed to \a s void seed(unsigned int s); /// Returns a random integer from the interval \f$[0\ldots n)\f$ unsigned int operator ()(unsigned int n); /// Returns a random integer from the interval \f$[0\ldots n)\f$ int operator ()(int n); /// Returns a random integer from the interval \f$[0\ldots n)\f$ unsigned long long int operator ()(unsigned long long int n); /// Returns a random integer from the interval \f$[0\ldots n)\f$ long long int operator ()(long long int n); /// Delete implemenentation virtual ~IMP(void); }; /// 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; /// Returns a random integer from the interval \f$[0\ldots n)\f$ unsigned int operator ()(unsigned int n); /// Returns a random integer from the interval \f$[0\ldots n)\f$ int operator ()(int n); /// Returns a random integer from the interval \f$[0\ldots n)\f$ unsigned long long int operator ()(unsigned long long int n); /// Returns a random integer from the interval \f$[0\ldots n)\f$ long long int operator ()(long long int n); };
forceinline unsigned int Rnd::IMP::seed(void) const { unsigned int s; const_cast<Rnd::IMP&>(*this).m.acquire(); s = rg.seed(); const_cast<Rnd::IMP&>(*this).m.release(); return s; } forceinline void Rnd::IMP::seed(unsigned int s) { m.acquire(); rg.seed(s); m.release(); } forceinline unsigned int Rnd::IMP::operator ()(unsigned int n) { unsigned int r; m.acquire(); r=rg(n); m.release(); return r; } forceinline int Rnd::IMP::operator ()(int n) { int r; m.acquire(); r=rg(n); m.release(); return r; } forceinline unsigned long long int Rnd::IMP::operator ()(unsigned long long int n) { unsigned long long int r; m.acquire(); r=rg(n); m.release(); return r; } forceinline long long int Rnd::IMP::operator ()(long long int n) { long long int r; m.acquire(); r=rg(n); m.release(); return r; }
forceinline unsigned int Rnd::seed(void) const { const IMP* i = static_cast<const IMP*>(object()); return i->seed(); } forceinline unsigned int Rnd::operator ()(unsigned int n) { IMP* i = static_cast<IMP*>(object()); return (*i)(n); } forceinline int Rnd::operator ()(int n) { IMP* i = static_cast<IMP*>(object()); return (*i)(n); } forceinline unsigned long long int Rnd::operator ()(unsigned long long int n) { IMP* i = static_cast<IMP*>(object()); return (*i)(n); } forceinline long long int Rnd::operator ()(long long int n) { IMP* i = static_cast<IMP*>(object()); return (*i)(n); }
}
// STATISTICS: kernel-other