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Sim-0.03
River stage zero No dependents
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/ Sim

NAME

Sim - Simulator engine for discrete events

VERSION

This document describes Sim 0.03 released on 2 June, 2007.

SYNOPSIS

    use Sim;

    Sim->schedule(
        0.2 => sub { print "Hi\n" },
        0.4 => sub {
            Sim->schedule(
                0.5 => sub { print "Wow!\n" },
                Sim->now + 0.2 => sub { print "Hello!\n" },
            );
        },
        0.5 => sub { print "now is ", Sim->now, "\n"; },
    );

    Sim->run( duration => 1.0 );  # upper-limit for simulation time

    # OR: Sim->run( fires => 15 );  # upper-limit for number of event fires

    print "now is ", Sim->now, "\n";  # now is 0.6

DESCRIPTION

Sim is a general-purpose discrete event simulator engine written in pure Perl. It was originally developed as the run-core of a sequential/conbinational logic circuit simulator named Tesla.

The Sim class is just a static class wrapping around a Sim::Dispatcher instance and a Sim::Clock instance. I used AUTOLOAD to do the magic instead of writing a lot of boring code. It's expected that using Sim::Dispatcher directly can be a bit faster but is certainly less convenient.

If you want to use a different clock model with vectorized time read, say a [sec, delta], which is found in a lot of EDA simulators, then you should use Sim::Dispatcher instead of Sim and define your clock class yourself.

See Sim::Dispatcher for more information.

STATIC METHODS

All the methods of Sim::Dispatcher are available for this class, but they are exposed as static methods only :)

TODO

  • Add cookbooks for M/M/1 and M/M/m queueing problems.

  • Add support for vectorized timestamp (i.e. something like 3 sec + 3 * delta).

  • Add missing features compared to SimPy in the Python world.

BUGS

There must be some serious bugs lurking somewhere; if you find one, please consider firing off a report to http://rt.cpan.org/NoAuth/Bugs.html?Dist=Sim.

VERSION CONTROL

You can always get the latest version of the source from the following Subversion repository:

http://svn.openfoundry.org/sim/

which has anonymous access to all.

If you do want a commit bit and become a coauthor, please let me know :)

CODE COVERAGE

I use Devel::Cover to test the code coverage of the test suite:

 ---------------------------- ------ ------ ------ ------ ------ ------ ------
 File                           stmt   bran   cond    sub    pod   time  total
 ---------------------------- ------ ------ ------ ------ ------ ------ ------
 blib/lib/Sim.pm               100.0   50.0   66.7  100.0    n/a    5.7   91.7
 blib/lib/Sim/Clock.pm         100.0   83.3    n/a  100.0  100.0    9.0   97.3
 blib/lib/Sim/Dispatcher.pm     94.6   75.0  100.0  100.0  100.0   31.1   92.2
 ---------------------------- ------ ------ ------ ------ ------ ------ ------

AUTHOR

Agent Zhang <agentzh@gmail.com>

COPYRIGHT

Copyright 2006, 2007 by Agent Zhang. All rights reserved.

This library is free software; you can modify and/or modify it under the same terms as Perl itself.

SEE ALSO

Sim::Dispatcher, Sim::Clock.