65 lines
1.8 KiB
Erlang
65 lines
1.8 KiB
Erlang
%%%----------------------------------------------------------------------
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%%% File : randoms.erl
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%%% Author : Alexey Shchepin <alexey@process-one.net>
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%%% Purpose : Random generation number wrapper
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%%% Created : 13 Dec 2002 by Alexey Shchepin <alexey@process-one.net>
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%%%
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%%%
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%%% ejabberd, Copyright (C) 2002-2012 ProcessOne
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%%%
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%%% This program is free software; you can redistribute it and/or
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%%% modify it under the terms of the GNU General Public License as
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%%% published by the Free Software Foundation; either version 2 of the
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%%% License, or (at your option) any later version.
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%%%
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%%% This program is distributed in the hope that it will be useful,
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%%% but WITHOUT ANY WARRANTY; without even the implied warranty of
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%%% MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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%%% General Public License for more details.
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%%%
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%%% You should have received a copy of the GNU General Public License
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%%% along with this program; if not, write to the Free Software
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%%% Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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%%% 02111-1307 USA
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%%%
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%%%----------------------------------------------------------------------
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-module(randoms).
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-author('alexey@process-one.net').
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-export([get_string/0]).
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-export([start/0, init/0]).
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start() ->
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case erlang:whereis(random_generator) of
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Pid when is_pid(Pid) ->
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true;
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undefined ->
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register(random_generator, spawn(randoms, init, []))
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end.
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init() ->
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{A1, A2, A3} = now(),
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random:seed(A1,A2,A3),
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loop().
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loop() ->
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receive
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{From, get_random, N} ->
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From ! {random, random:uniform(N)},
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loop();
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_ ->
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loop()
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end.
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get_string() ->
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random_generator ! {self(), get_random, 65536*65536},
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receive
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{random, R} ->
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integer_to_list(R)
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end.
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