module Covered::Forks::Handler

@raises [ArgumentError] If coverage is already registered.
@parameter coverage [Covered::Forks] The coverage wrapper to use in forked children.
Register coverage for fork handling.

def start(coverage)
	LOCK.synchronize do
		if @coverage
			raise ArgumentError, "Coverage is already being tracked!"
		end
		
		@coverage = coverage
	end
end