_G access limit.

node/buffer.lua

@@ -295,5 +295,5 @@ function Buffer.isBuffer(buf)
 	return ffi.istype(bufferCT, buf)
 end
 
-_G.Buffer = Buffer
+rawset(_G,  "Buffer",  Buffer)
 return Buffer

node/lua_ex.lua

@@ -19,3 +19,12 @@ function newWholeWeakTable()
 	return ret
 end
 
+
+-- limit global newindex
+-- only rawset(_G, key, value) is allowed.
+setmetatable(_G, {
+		__newindex = function (t, k, v)
+			print("Warning: writing global variant "..k)
+			rawset(t, k, v)
+		end
+	})

node/main.lua

@@ -28,6 +28,10 @@ end
 
 local path = require("path")
 
+require("lua_ex")
+
 -- TODO: use option module to parse command line.
 dofile(arg[1])
 
+local uv = require("uv")
+uv.uv_run(uv.uv_default_loop(), uv.UV_RUN_DEFAULT)

node/path.lua

@@ -14,7 +14,7 @@
 -- read LICENSE.md for more informations.
 
 local path = {}
-_G.path = path
+rawset(_G, "path", path)
 
 local curdir = "."
 local pardir = ".."

test/uv/testuv.lua

@@ -1,4 +1,16 @@
 local uv = require("uv")
+local ffi = require("ffi")
 
-uv.uv_run(uv.uv_default_loop(), uv.UV_RUN_DEFAULT)
+local idler = ffi.new("uv_idle_t[1]");
+
+uv.uv_idle_init(uv.uv_default_loop(), idler);
+
+local counter = 0
+uv.uv_idle_start(idler, function(handle)
+	counter = counter + 1
+	if (counter > 10e6) then
+		uv.uv_idle_stop(handle)
+		print("Exiting... ")
+	end
+end);