make sim global; make nonessential queues optional

sim/gate.lua

@@ -5,16 +5,18 @@ FFI.cdef[[
 	struct Gate {
 		int objref;
 		int definition_objref;
+		bool in_queue;
 		struct Port ports[1];
 	};
 ]]
 
-function Gate.new(self, objref, definition, sim)
+function Gate.new(self, objref, definition)
 	local o = {
 		objref = objref,
 		definition = definition,
 		ports = {},
-		sim = sim,
+		in_queue = false,
+		logic = definition.logic,
 	}
 	setmetatable(o, self)
 	self.__index = self
@@ -27,7 +29,7 @@ function Gate.addport(self, port)
 end
 
 function Gate.getportstate(self, index)
-	return Port.getinputstate(self.ports[index])
+	return self.ports[index].group.state
 end
 
 function Gate.setportstate(self, index, state)
@@ -51,19 +53,15 @@ function Gate.getportisfalling(self, index)
 end
 
 function Gate.cb(gate, ...)
-	Simulation.queuecallback(Gate.getsim(gate), gate, ...)
+	Simulation.queuecallback(GSim, gate, ...)
 end
 
 function Gate.queue(gate, delay)
-	Simulation.queuegatelater(Gate.getsim(gate), gate, delay)
+	Simulation.queuegatelater(GSim, gate, delay)
 end
 
 function Gate.gettick(gate)
-	return Gate.getsim(gate).currenttick
-end
-
-function Gate.getsim(gate)
-	return gate.sim
+	return GSim.currenttick
 end
 
 function Gate.getdefinition(gate)
@@ -77,7 +75,7 @@ function Gate.init(gate)
 end
 
 function Gate.logic(gate)
-	Gate.getdefinition(gate).logic(gate)
+	gate.logic(gate)
 end
 
 function Gate.input(gate, argv)