From: Masahiro TANAKA <masa@...>
Date: 2005-09-08T12:55:51+09:00
Subject: Re: sharing memory in ruby

Hi,

>Ara wrote:
>    +  ary->ref = Qfalse;
> 
> the 'ary->ref' means it will not be free'd...

This is not what I have intended.
'ary->ref' is an object that is referred from NArray object
so that the original String object is not garbage-collected.
So here should be `ary->ref = str;'.

>    +  ary->ptr = RSTRING(str)->ptr;

This has a serious caveat.

  s = "0000"
  na = NArray.str(s,2,NArray::SINT)
  s << "1"*100 # The memory of 's' will be reallocated.
  puts na[0]   # accesses an invalid memory.

However, I think it would be quite useful if Ruby have something like
a common memory framework, which Ara suggested, for handling huge memory.

Masahiro Tanaka