tree a81a0331b75c72ec801d1ecf1ce62a8bc6f3d112
parent c38f5098b152ea1e1dde96220d3f9e50d3411780
author Brandon Potter <brandon.potter@amd.com> 1436562323 -0500
committer Brandon Potter <brandon.potter@amd.com> 1436562323 -0500

ruby: replace global g_system_ptr with per-object pointers

This is another step in the process of removing global variables
from Ruby to enable multiple RubySystem instances in a single simulation.

With possibly multiple RubySystem objects, we can no longer use a global
variable to find "the" RubySystem object.  Instead, each Ruby component
has to carry a pointer to the RubySystem object to which it belongs.