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Groups > comp.lang.forth > #14677

Re: heap implementation

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Rod Pemberton <do_not_have@notemailnot.cmm> wrote:
>> It doesn't have ALLOCATION for one thing (a function
>> that returns the amount of memory in a node given the
>> node's address).
> That sounds _alot_ like C's sizeof()... on a node... at least to me.  So,
> why don't you just implement C's SIZEOF for Forth?  ;-)

No, sizeof() is an operator which compiles to a constant based on looking at
the (compile time) types.  This sounds more like a runtime thing.  malloc()
records the size of the allocated object, so that free() can return its
storage.  I don't think there's ever been an API to find out an allocated
node's size--if you care, you have to keep it somewhere (usually in the
allocate memory) for yourself.

-- 
Andy Valencia
Home page: http://www.vsta.org/andy/
To contact me: http://www.vsta.org/contact/andy.html

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heap implementation Hugh Aguilar <hughaguilar96@nospicedham.yahoo.com> - 2012-08-02 00:25 -0700
  Re: heap implementation Alex McDonald <blog@nospicedham.rivadpm.com> - 2012-08-02 02:51 -0700
    Re: heap implementation Andrew Haley <andrew29@littlepinkcloud.invalid> - 2012-08-02 05:23 -0500
      Re: heap implementation Alex McDonald <blog@rivadpm.com> - 2012-08-02 13:57 -0700
  Re: heap implementation "Rod Pemberton" <do_not_have@notemailnot.cmm> - 2012-08-02 18:45 -0400
    Re: heap implementation vandys@vsta.org - 2012-08-02 22:53 +0000
      Re: heap implementation Hugh Aguilar <hughaguilar96@yahoo.com> - 2012-08-02 21:53 -0700
        Re: heap implementation "Rod Pemberton" <do_not_have@notemailnot.cmm> - 2012-08-03 07:23 -0400
          Re: heap implementation anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2012-08-03 12:12 +0000
            Re: heap implementation Hugh Aguilar <hughaguilar96@yahoo.com> - 2012-08-05 23:08 -0700
        Re: heap implementation Alex McDonald <blog@rivadpm.com> - 2012-08-03 08:41 -0700
      Re: heap implementation "Rod Pemberton" <do_not_have@notemailnot.cmm> - 2012-08-03 06:58 -0400
        Re: heap implementation Alex McDonald <blog@rivadpm.com> - 2012-08-03 05:36 -0700
          Re: heap implementation Hugh Aguilar <hughaguilar96@yahoo.com> - 2012-08-05 23:28 -0700
      Re: heap implementation Aleksej Saushev <asau@inbox.ru> - 2012-08-06 01:43 +0400
  Re: heap implementation "wolfgang kern" <nowhere@never.at> - 2012-08-17 19:57 +0200

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