ian@0: //  Copyright 2011, Ian Hobson.
ian@0: //
ian@0: //  This file is part of gpsynth.
ian@0: //
ian@0: //  gpsynth is free software: you can redistribute it and/or modify
ian@0: //  it under the terms of the GNU General Public License as published by
ian@0: //  the Free Software Foundation, either version 3 of the License, or
ian@0: //  (at your option) any later version.
ian@0: //
ian@0: //  gpsynth is distributed in the hope that it will be useful,
ian@0: //  but WITHOUT ANY WARRANTY; without even the implied warranty of
ian@0: //  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
ian@0: //  GNU General Public License for more details.
ian@0: //
ian@0: //  You should have received a copy of the GNU General Public License
ian@0: //  along with gpsynth in the file COPYING. 
ian@0: //  If not, see http://www.gnu.org/licenses/.
ian@0: 
ian@0: // Boost helper functions
ian@0: 
ian@0: #pragma once
ian@0: 
ian@0: #include "boost/foreach.hpp"
ian@0: #include "boost/random/mersenne_twister.hpp"
ian@0: #include "boost/random/normal_distribution.hpp"
ian@0: #include "boost/random/variate_generator.hpp"
ian@0: #include "boost/shared_array.hpp"
ian@0: #include "boost/thread.hpp"
ian@0: 
ian@0: #include <cstddef>
ian@0: #include <ctime>
ian@0: 
ian@0: // foreach macro
ian@0: #define foreach BOOST_FOREACH
ian@0: #define foreach_reverse BOOST_REVERSE_FOREACH
ian@0: 
ian@0: namespace bx {
ian@0:   
ian@0:   // Sleep the current thread for a certain number of milliseconds
ian@0:   inline void SleepMs(int milliseconds) {
ian@0:     boost::this_thread::sleep(boost::posix_time::milliseconds(milliseconds));
ian@0:   }
ian@0:   
ian@0:   // boost.random helpers
ian@0:   typedef boost::random::mt19937 EngineType;
ian@0:   typedef boost::variate_generator<EngineType, boost::normal_distribution<> >
ian@0:     GaussianGenerator;
ian@0:   
ian@0:   class Random {
ian@0:     EngineType engine_;
ian@0:     
ian@0:   public:
ian@0:     Random() : engine_(static_cast<unsigned int>(std::time(0))) {}
ian@0:     EngineType& Engine() { return engine_; }
ian@0:     
ian@0:     static Random& Singleton() {
ian@0:       static Random random;
ian@0:       return random;
ian@0:     }
ian@0:   };
ian@0: 
ian@0:   static GaussianGenerator MakeGaussianGenerator(double mean = 0.0,
ian@0:                                                  double sigma = 1.0) {
ian@0:     boost::normal_distribution<> distribution(mean, sigma);
ian@0:     return GaussianGenerator(Random::Singleton().Engine(), distribution);
ian@0:   }
ian@0:   
ian@0:   static EngineType& RandomEngine() {
ian@0:     return Random::Singleton().Engine();
ian@0:   }
ian@0:   
ian@0:   
ian@0: } // bx namespace