102 lines
1.8 KiB
Lua
102 lines
1.8 KiB
Lua
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local ffi = FFI or require("ffi")
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Gate = {}
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ffi.cdef [[
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struct OutPort {
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struct Net* net;
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int state;
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};
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struct Gate {
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int in_queue;
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struct OutPort ports[0];
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};
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]]
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function Gate.new(objref, definition)
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local gate = {
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-- Logic Critical
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c = nil,
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logic = definition.logic,
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ports = {},
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port_nets = {},
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objref = objref,
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definition = definition,
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}
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local cdata = ffi.new("char["..(ffi.sizeof("struct Gate") + ffi.sizeof("struct OutPort")*(#gate.ports+1)).."]")
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gate.c = ffi.cast("struct Gate*", cdata)
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gate.c.in_queue = 0
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return gate
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end
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-- Logic Critical
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function Gate.getportstate(gate, index)
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return gate.c.ports[index].state
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end
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-- Logic Critical
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function Gate.setportstate(gate, index, state)
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if state ~= gate.c.ports[index].state then
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local group = gate.port_nets[index]
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group.state_num = group.state_num - gate.c.ports[index].state + state
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gate.c.ports[index].state = state
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if ((group.state_num>0) ~= (group.state==1)) and (group.in_queue==0) then
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Simulation.queuegroup(GSim, group)
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end
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end
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end
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-- Logic Critical
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function Gate.logic(gate)
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gate.logic(gate)
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end
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function Gate.preinit(gate)
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end
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function Gate.initdata(gate)
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gate.data = {}
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end
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function Gate.getdata(gate)
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return gate.data
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end
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function Gate.getportisrising(gate, index)
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return Port.isrising(gate.ports[index])
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end
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function Gate.getportisfalling(gate, index)
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return Port.isfalling(gate.ports[index])
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end
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function Gate.cb(gate, ...)
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Simulation.queuecallback(GSim, gate, ...)
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end
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function Gate.queue(gate, delay)
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Simulation.queuegatelater(GSim, gate, delay)
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end
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function Gate.gettick(gate)
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return GSim.current_tick
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end
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function Gate.getdefinition(gate)
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return gate.definition
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end
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-- Logic functions
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function Gate.init(gate)
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Gate.getdefinition(gate).init(gate)
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end
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function Gate.input(gate, argv)
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Gate.getdefinition(gate).input(gate, argv)
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end
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