rng.cpp

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 *   Copyright (C) 2004-2015 The PaGMO development team,                     *
 *   Advanced Concepts Team (ACT), European Space Agency (ESA)               *
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 *   act@esa.int                                                             *
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#include <boost/date_time/posix_time/posix_time.hpp>
#include <boost/thread/locks.hpp>
#include <boost/thread/mutex.hpp>

#include "rng.h"

namespace pagmo
{

boost::mutex rng_generator::m_mutex;

// Use as initial seed the number of microseconds elapsed since 01/01/1970, cast to uint32_t.
rng_uint32 rng_generator::m_seeder(boost::uint32_t((boost::posix_time::microsec_clock::local_time() -
        boost::posix_time::ptime(boost::gregorian::date(1970,1,1))).total_microseconds()));


void rng_generator::set_seed(int n)
{
        boost::lock_guard<boost::mutex> lock(m_mutex);
        m_seeder.seed(n);
}


template <class Rng> 
Rng rng_generator::get()
{
        boost::lock_guard<boost::mutex> lock(m_mutex);
        return Rng(m_seeder());
}

template __PAGMO_VISIBLE rng_double rng_generator::get<rng_double>();
template __PAGMO_VISIBLE rng_uint32 rng_generator::get<rng_uint32>();

}