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I would like to offer my Lua users a way to check the "used RAM
memory" for my "Low RAM" applications (RAM ca. 60kB).

I have give my own alloc function to Lua which checks every free and
alloc and always updates an integer iBytesAlloc... . This is the
consumed memory in unit bytes.

If the user wants to know the "used RAM memory", it is necessary to do
a full garbage collect, this would be the internal Lua function
luaC_fullgc(L, 1) (with 2nd parameter "1", showing "emergency

... I would prefer to use lua_gc for this, but lua_gc(LUA_GCCOLLECT)
would only invoke luaC_fullgc( L, 0)... .

Is it safe, that I invoke luaC_fullgc( L, 1) in my C software? Or are
there possible pitfalls (why can I not invoke e. g.
lua_gc(LUA_GCCOLLECTFULL)? - this would be nicer from my point of