Re: Algorithm help: passing strings between threads with minimal copying

[Ross Bencina <rossb-lists@...>]

On 9/04/2014 5:48 PM, Rena wrote:
> The `osize` field of lua_Alloc() when `ptr=NULL` tells you the type of
> object being allocated. But I'm not sure how to detect that it's *that
> particular string* Lua is allocating memory for, other than setting a
> flag just before the lua_pushlstring() and having the allocator check
> for that flag and a string of that length. But that seems quite fragile.

That was the kind of thing I had in mind.

Why do you think that it's fragile?

I was thinking you would define a C function to allocate these 
particular "shared strings". That function sets the flag, calls 
lua_pushlstring(), and then unsets the flag.

Alternatively, simply allocate all strings with the refcount (or all 
strings above a certain size).

Ross.