lua_lock/lua_unlock

[David Gish <david@...>]

Hello All,

I'm porting a video game that uses Lua 5.0. The interpreter frequently 
crashes on startup and the evidence points to a reference counting bug 
or perhaps simple data corruption. The game uses true preemptive 
threads, but Lua is only called from the main thread, and I understand 
that within Lua "threads" are just cooperative coroutines. Anyway, I 
noticed that the lua_lock() and lua_unlock() macros don't generate any 
code. This is hardly surprising since both are defined as ((void) 0) -- 
see http://www.lua.org/source/5.0/src_lstate.h.html

I apologize for being a complete Lua newbie and also for not having 
read the voluminous archives, but can anyone tell me what's going on 
with these macros? I read in one posting how someone solved a problem 
with them, but I must confess I don't get it.

Many thanks,

David Gish