lua_lock and lua_unlock usage in LuaThread1.0-work?

["yonghichoi" <yonghichoi@...>]

Hi,

When should I use lua_lock() and lua_unlock() while I write C 
extention function?
While I looked over serveral source files, I found some C functions 
use lua_lock()/lua_unlock() pair, but some functions did not use them.

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yonghi