[fpc-pascal] dynamic array and new/dispose

[ik]

I have created a proof of concept from your code:

----------------------------
{$mode delphi}
program test;

type
  PChunk = ^Chunk;
  Chunk = Object
       SubChunks : array of PChunk;
       data : Pointer;
       Function NewSubchunk: integer;
  end;

function Chunk.NewSubchunk :integer;
var
 x : integer;
begin
  x := High(SubChunks)+2;
  setlength(SubChunks, x);
  New(subchunks[x]);
  SubChunks[x]^.Data := Self.Data;
  Result := x;
end;

var
 ac : Chunk;

begin
 ac.data := PChar('Hello world');
 writeln(ac.NewSubchunk);
end.

-----------------------

Does it work for you (I do not have any apple to test it on, but it works on
my Linux) ?

And yes it leaks memory :)

Ido
LINESIP - Opening the source for communication
http://www.linesip.com
http://www.linesip.co.il




On Wed, Feb 2, 2011 at 17:29, Amit Bueno <amitbueno at gmail.com> wrote:

> Of course it does -- otherwise it won't have worked on delphi under
> windows.
> The X = High(SubChunks);
> ---
> Amit
>
> On Wed, Feb 2, 2011 at 5:27 PM, ik <idokan at gmail.com> wrote:
>
>>  On Wed, Feb 2, 2011 at 17:18, Amit Bueno <amitbueno at gmail.com> wrote:
>>
>>>  The SubChunks are -- 'var subchunks array of pchunk;' contained in
>>> chunk
>>> before allocating the subchunks a setlength(subchunks, High(subchunks)+2)
>>> is called.
>>>
>>
>> But does the X variable point to existed index in the array ? if not, then
>> it explains the "access violation".
>>
>>
>>>  ---
>>> Amit
>>>
>>>   On Wed, Feb 2, 2011 at 5:15 PM, ik <idokan at gmail.com> wrote:
>>>
>>>>
>>>>
>>>>
>>>> On Wed, Feb 2, 2011 at 16:57, Amit Bueno <amitbueno at gmail.com> wrote:
>>>>
>>>>>  Seems that the ios doesn't allocated properly my objects,. after
>>>>> allocation when trying to run a function from the object it fails.
>>>>> I tried replacing the New(subchunks[X]) to SubChunks[X] :=
>>>>> AllocMem(sizeof(Chunk));
>>>>> Again this works on the windows, it doesn't on the ios.
>>>>>
>>>>> Have you got any ideas?
>>>>>
>>>>
>>>> Does "X" actually exists as an index (I mean the value of it) ?
>>>>
>>>>
>>>>
>>>>>  ---
>>>>> Amit
>>>>>
>>>>>   On Wed, Feb 2, 2011 at 3:34 PM, Amit Bueno <amitbueno at gmail.com>wrote:
>>>>>
>>>>>> Attached is the shrinked prof.rar file (481kb).
>>>>>> You can download it as well from:
>>>>>> http://bueno.co.il/files/prof.rar
>>>>>>
>>>>>>
>>>>>> ---
>>>>>> Amit
>>>>>>
>>>>>> -----Original Message-----
>>>>>> From: fpc-pascal-bounces at lists.freepascal.org
>>>>>> [mailto:fpc-pascal-bounces at lists.freepascal.org] On Behalf Of Jonas
>>>>>> Maebe
>>>>>>  Sent: Wednesday, February 02, 2011 3:28 PM
>>>>>> To: FPC-Pascal users discussions
>>>>>> Subject: Re: [fpc-pascal] dynamic array and new/dispose
>>>>>>
>>>>>>
>>>>>>   On 02 Feb 2011, at 14:10, Amit Bueno wrote:
>>>>>>
>>>>>> > Have you got the prof.rar?
>>>>>>
>>>>>> No. I've just looked at the posts held for moderation and your mail is
>>>>>> over
>>>>>> 5MB. That is way too large to send to a mailing list. First of all,
>>>>>> make
>>>>>> sure to only include source code, not compiled units, programs or
>>>>>> resources.
>>>>>> Secondly, if it's that big, put it online on a website and only send
>>>>>> the
>>>>>> link to the mailing list.
>>>>>>
>>>>>>
>>>>>> Jonas
>>>>>> _______________________________________________
>>>>>> fpc-pascal maillist  -  fpc-pascal at lists.freepascal.org
>>>>>> http://lists.freepascal.org/mailman/listinfo/fpc-pascal
>>>>>>
>>>>>
>>>>>
>>>>> _______________________________________________
>>>>> fpc-pascal maillist  -  fpc-pascal at lists.freepascal.org
>>>>> http://lists.freepascal.org/mailman/listinfo/fpc-pascal
>>>>>
>>>>
>>>>
>>>> Ido
>>>> LINESIP - Opening the source for communication
>>>> http://www.linesip.com
>>>> http://www.linesip.co.il
>>>>
>>>>
>>>>
>>>> _______________________________________________
>>>> fpc-pascal maillist  -  fpc-pascal at lists.freepascal.org
>>>> http://lists.freepascal.org/mailman/listinfo/fpc-pascal
>>>>
>>>
>>>
>>> _______________________________________________
>>> fpc-pascal maillist  -  fpc-pascal at lists.freepascal.org
>>> http://lists.freepascal.org/mailman/listinfo/fpc-pascal
>>>
>>
>>
>> Ido
>> LINESIP - Opening the source for communication
>> http://www.linesip.com
>> http://www.linesip.co.il
>>
>>
>> _______________________________________________
>> fpc-pascal maillist  -  fpc-pascal at lists.freepascal.org
>> http://lists.freepascal.org/mailman/listinfo/fpc-pascal
>>
>
>
> _______________________________________________
> fpc-pascal maillist  -  fpc-pascal at lists.freepascal.org
> http://lists.freepascal.org/mailman/listinfo/fpc-pascal
>
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