Don't pollute global _G space.

src/poller.lua

@@ -83,14 +83,14 @@ function poller_mt:stop()
 	self.is_running = false
 end
 
-module(...)
+local M = {}
 
-function new(pre_alloc)
+function M.new(pre_alloc)
 	return setmetatable({
 		poller = zmq.ZMQ_Poller(pre_alloc),
 		callbacks = {},
 	}, poller_mt)
 end
 
-setmetatable(_M, {__call = function(tab, ...) return new(...) end})
+return setmetatable(M, {__call = function(tab, ...) return M.new(...) end})
 

src/threads.lua

@@ -85,26 +85,27 @@ local function new_thread(ctx, action, action_arg, ...)
 	}, thread_mt)
 end
 
-module(...)
+local M = {}
 
-function set_bootstrap_prelude(code)
+function M.set_bootstrap_prelude(code)
    bootstrap_code = bootstrap_pre .. code .. bootstrap_post
 end
 
-function runfile(ctx, file, ...)
+function M.runfile(ctx, file, ...)
 	return new_thread(ctx, 'runfile', file, ...)
 end
 
-function runstring(ctx, code, ...)
+function M.runstring(ctx, code, ...)
 	return new_thread(ctx, 'runstring', code, ...)
 end
 
 local parent_ctx = nil
-function set_parent_ctx(ctx)
+function M.set_parent_ctx(ctx)
 	parent_ctx = ctx
 end
 
-function get_parent_ctx(ctx)
+function M.get_parent_ctx(ctx)
 	return parent_ctx
 end
 
+return M