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- Subject: Re: [ANNOUNCE] Lua 5.0 (alpha) now available
- From: Björn De Meyer <bjorn.demeyer@...>
- Date: Fri, 16 Aug 2002 10:35:22 +0200
Luiz Henrique de Figueiredo wrote:
> >Are we going to document lua_boxpointer?
> In Lua 5.0 we cleaned up the confusion of what a userdata is and how it is
> created: userdata are Lua objects created with lua_newuserdata:
> LUA_API void *lua_newuserdata (lua_State *L, size_t size);
> lua_newuserdata creates an object that has an attached buffer of the given
> size; this buffer is returned to the host program and can be written to.
> Lua never looks inside the buffer, but userdata objects, like all other objects,
> are subject to garbage collection. In other words, lua_newuserdata gives
> you a buffer that you don't have to worry about mallocing or freeing, but
> which you can used to store whatever you want, even dynamically changing its
That's good! But, what if you want to resize the data block pointed to?
Wouldn't a void * lua_resizeuserdata(lua_State *L, void *ptr, size_t
come in handy then? Or is it already there?
"No one knows true heroes, for they speak not of their greatness." --
Björn De Meyer