Re: PATCH: Lua5.1-work3 loadlib cleanups (UPDATE)

[Adrián Pérez <copylight@...>]

El 08/12/2004, a las 9:23, Mike Pall escribió:

> lib/loadlib.c:
> - [...]
> - Change registerlib() to take a memory pointer and a size argument.
>   A single boxed pointer does not suffice for the Mac OS X (un)loader.
> - Pass back a pointer to the copied memory area to freelib().

One of the comments in from "loadlib.c" in lua-5.0.2 in the LuaCheia 
CVS:

 /* According to Apple's documentation, we can destroy the object image
  * after linking it: although we instruct Dyld to do that, Dyld will
  * keep it in memory as long as it is linked in the executable (i.e:
  * until NSUnLinkModule() is called)
  */

(This came up when Apple released full documentation for Dyld when 
Panther was released).
So, you could implement loadlib() and freelib() with only a single 
boxed pointer.

In loadlib():
 1. image = NSCreateObjectFileImageFromPath()
 2. module = NSLinkModule(image)
 3. NSDestroyObjectFileImage(image)

In freelib():
 1. Just NSUnlinkModule(module)

The module won't be unloaded until you call NSUnlinkModule(module).

Hope this little comment will simplify things a bit. Cheers,

-ap

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