From: Javier Sancho <jsf@jsancho.org>
Date: Sun, 8 Dec 2013 06:11:34 +0000 (+0100)
Subject: Set engine systems while running
X-Git-Url: https://git.jsancho.org/?p=gacela.git;a=commitdiff_plain;h=c62dceb1471afb94efa57eef5506fbdf6f2ef679;hp=c62dceb1471afb94efa57eef5506fbdf6f2ef679

Set engine systems while running

* src/engine.scm: new function set-engine-systems! using engine mutex
                  for avoiding concurrency errors

* src/system.scm: new function group-systems, that returns joined
                  systems or an empty system, depending on arguments
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