FM / random

/usr/include/boost/random

Name	Size	Mode	Actions
detail/	-	0755	rm
additive_combine.hpp	8826	0644	edit dl rm
bernoulli_distribution.hpp	5608	0644	edit dl rm
beta_distribution.hpp	5900	0644	edit dl rm
binomial_distribution.hpp	12985	0644	edit dl rm
cauchy_distribution.hpp	6528	0644	edit dl rm
chi_squared_distribution.hpp	6322	0644	edit dl rm
discard_block.hpp	7991	0644	edit dl rm
discrete_distribution.hpp	21137	0644	edit dl rm
exponential_distribution.hpp	20895	0644	edit dl rm
extreme_value_distribution.hpp	5611	0644	edit dl rm
faure.hpp	11474	0644	edit dl rm
fisher_f_distribution.hpp	5924	0644	edit dl rm
gamma_distribution.hpp	9166	0644	edit dl rm
generate_canonical.hpp	2954	0644	edit dl rm
geometric_distribution.hpp	7339	0644	edit dl rm
hyperexponential_distribution.hpp	36980	0644	edit dl rm
independent_bits.hpp	9117	0644	edit dl rm
inversive_congruential.hpp	9550	0644	edit dl rm
lagged_fibonacci.hpp	18256	0644	edit dl rm
laplace_distribution.hpp	5743	0644	edit dl rm
linear_congruential.hpp	16214	0644	edit dl rm
linear_feedback_shift.hpp	7162	0644	edit dl rm
lognormal_distribution.hpp	8051	0644	edit dl rm
mersenne_twister.hpp	24094	0644	edit dl rm
negative_binomial_distribution.hpp	6911	0644	edit dl rm
niederreiter_base2.hpp	11736	0644	edit dl rm
non_central_chi_squared_distribution.hpp	7724	0644	edit dl rm
normal_distribution.hpp	17441	0644	edit dl rm
piecewise_constant_distribution.hpp	17186	0644	edit dl rm
piecewise_linear_distribution.hpp	18802	0644	edit dl rm
poisson_distribution.hpp	10145	0644	edit dl rm
random_device.hpp	5032	0644	edit dl rm
random_number_generator.hpp	1958	0644	edit dl rm
ranlux.hpp	3292	0644	edit dl rm
seed_seq.hpp	3792	0644	edit dl rm
shuffle_order.hpp	9181	0644	edit dl rm
shuffle_output.hpp	1352	0644	edit dl rm
sobol.hpp	7704	0644	edit dl rm
student_t_distribution.hpp	5633	0644	edit dl rm
subtract_with_carry.hpp	21590	0644	edit dl rm
taus88.hpp	1164	0644	edit dl rm
traits.hpp	4165	0644	edit dl rm
triangle_distribution.hpp	7033	0644	edit dl rm
uniform_01.hpp	7538	0644	edit dl rm
uniform_int.hpp	2909	0644	edit dl rm
uniform_int_distribution.hpp	16199	0644	edit dl rm
uniform_on_sphere.hpp	8812	0644	edit dl rm
uniform_real.hpp	2449	0644	edit dl rm
uniform_real_distribution.hpp	7726	0644	edit dl rm
uniform_smallint.hpp	12230	0644	edit dl rm
variate_generator.hpp	3708	0644	edit dl rm
weibull_distribution.hpp	5524	0644	edit dl rm
xor_combine.hpp	7049	0644	edit dl rm

Edit: /usr/include/boost/random/random_device.hpp (5032B)

/* boost random/random_device.hpp header file
 *
 * Copyright Jens Maurer 2000
 * Copyright Steven Watanabe 2010-2011
 * Distributed under the Boost Software License, Version 1.0. (See
 * accompanying file LICENSE_1_0.txt or copy at
 * http://www.boost.org/LICENSE_1_0.txt)
 *
 * $Id$
 *
 * Revision history
 *  2000-02-18  Portability fixes (thanks to Beman Dawes)
 */

//  See http://www.boost.org/libs/random for documentation.

#ifndef BOOST_RANDOM_RANDOM_DEVICE_HPP
#define BOOST_RANDOM_RANDOM_DEVICE_HPP

#include <string>
#include <boost/config.hpp>
#include <boost/noncopyable.hpp>
#include <boost/random/detail/auto_link.hpp>
#include <boost/system/config.hpp> // force autolink to find Boost.System

namespace boost {
namespace random {

/**
 * Class \random_device models a \nondeterministic_random_number_generator.
 * It uses one or more implementation-defined stochastic processes to
 * generate a sequence of uniformly distributed non-deterministic random
 * numbers. For those environments where a non-deterministic random number
 * generator is not available, class random_device must not be implemented. See
 *
 *  @blockquote
 *  "Randomness Recommendations for Security", D. Eastlake, S. Crocker,
 *  J. Schiller, Network Working Group, RFC 1750, December 1994
 *  @endblockquote
 *
 * for further discussions. 
 *
 * @xmlnote
 * Some operating systems abstract the computer hardware enough
 * to make it difficult to non-intrusively monitor stochastic processes.
 * However, several do provide a special device for exactly this purpose.
 * It seems to be impossible to emulate the functionality using Standard
 * C++ only, so users should be aware that this class may not be available
 * on all platforms.
 * @endxmlnote
 *
 * <b>Implementation Note for Linux</b>
 *
 * On the Linux operating system, token is interpreted as a filesystem
 * path. It is assumed that this path denotes an operating system
 * pseudo-device which generates a stream of non-deterministic random
 * numbers. The pseudo-device should never signal an error or end-of-file.
 * Otherwise, @c std::ios_base::failure is thrown. By default,
 * \random_device uses the /dev/urandom pseudo-device to retrieve
 * the random numbers. Another option would be to specify the /dev/random
 * pseudo-device, which blocks on reads if the entropy pool has no more
 * random bits available.
 *
 * <b>Implementation Note for Windows</b>
 *
 * On the Windows operating system, token is interpreted as the name
 * of a cryptographic service provider.  By default \random_device uses
 * MS_DEF_PROV.
 *
 * <b>Performance</b>
 *
 * The test program <a href="\boost/libs/random/performance/nondet_random_speed.cpp">
 * nondet_random_speed.cpp</a> measures the execution times of the
 * random_device.hpp implementation of the above algorithms in a tight
 * loop. The performance has been evaluated on an
 * Intel(R) Core(TM) i7 CPU Q 840 \@ 1.87GHz, 1867 Mhz with
 * Visual C++ 2010, Microsoft Windows 7 Professional and with gcc 4.4.5,
 * Ubuntu Linux 2.6.35-25-generic.
 *
 * <table cols="2">
 *   <tr><th>Platform</th><th>time per invocation [microseconds]</th></tr>
 *   <tr><td> Windows </td><td>2.9</td></tr>
 *   <tr><td> Linux </td><td>1.7</td></tr>
 * </table>
 *
 * The measurement error is estimated at +/- 1 usec.
 */
class random_device : private noncopyable
{
public:
    typedef unsigned int result_type;
    BOOST_STATIC_CONSTANT(bool, has_fixed_range = false);

/** Returns the smallest value that the \random_device can produce. */
    static result_type min BOOST_PREVENT_MACRO_SUBSTITUTION () { return 0; }
    /** Returns the largest value that the \random_device can produce. */
    static result_type max BOOST_PREVENT_MACRO_SUBSTITUTION () { return ~0u; }

/** Constructs a @c random_device, optionally using the default device. */
    BOOST_RANDOM_DECL random_device();
    /** 
     * Constructs a @c random_device, optionally using the given token as an
     * access specification (for example, a URL) to some implementation-defined
     * service for monitoring a stochastic process. 
     */
    BOOST_RANDOM_DECL explicit random_device(const std::string& token);

BOOST_RANDOM_DECL ~random_device();

/**
     * Returns: An entropy estimate for the random numbers returned by
     * operator(), in the range min() to log2( max()+1). A deterministic
     * random number generator (e.g. a pseudo-random number engine)
     * has entropy 0.
     *
     * Throws: Nothing.
     */
    BOOST_RANDOM_DECL double entropy() const;
    /** Returns a random value in the range [min, max]. */
    BOOST_RANDOM_DECL unsigned int operator()();

/** Fills a range with random 32-bit values. */
    template<class Iter>
    void generate(Iter begin, Iter end)
    {
        for(; begin != end; ++begin) {
            *begin = (*this)();
        }
    }

private:
    class impl;
    impl * pimpl;
};

} // namespace random

using random::random_device;

} // namespace boost

#endif /* BOOST_RANDOM_RANDOM_DEVICE_HPP */

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