[Kochi-pm] Access Memory Location using Perl

[Bharathiraja P]

Thanks.

I found a workaround and it works.

I'm storing the address in db and add that address as key to class object
like

$object->{ "TAB_REFS" }{ $hash } = $hash

So, from the DB I can get the address for the inactive tabs and destroy it
easily.

2010/8/25 Varghese Chacko <vctheguru at gmail.com>

>  Raja,
>
> Its similar to 'C' memory allocation. ie, the address of the pointer is
> valid ONLY when the variable is in the system memory. I dont think you can
> get same data by storing an address in the db and then retrieving the
> address, unless you are trying to access some standard ports which always
> exists and accessible. So its NOT advisable to store hash reference in the
> database and cant guarentee to return the expected data every time you read
> that memory. You can always assign $my_new_hash_ref = 'HASH(0x91498b8)' and
> de-refer  it as my $my_new_hash = %$my_new_hash_ref;. But it may NOT return
> any value or may return undef or may return some garbage or random value or
> a de-reference error.
>
> Give a try and let us know. You may paste your code-snippet so that we will
> get a better view of what you are trying to do and we may be able to suggest
> something.
>
>
> regards
> VC
>
>
>
>
> Bharathiraja P wrote:
>
> I'm not actually printing. I'm just storing that address in db and I want
> to access the hash using the address
>
> On Wed, Aug 25, 2010 at 2:00 PM, Shibu P U <shibu.pu at gmail.com> wrote:
>
>> You have written as "I have a hash reference and if we print the reference
>> variable we will get an address.".
>> Above, you are printing a variable no?? I meant that variable.
>>
>> Regards
>> Shibu P U
>>
>>
>>
>> On Wed, Aug 25, 2010 at 1:39 PM, Bharathiraja P <pbrthemaster at gmail.com>wrote:
>>
>>> I have only the address not the reference variable.
>>>
>>>
>>> On Wed, Aug 25, 2010 at 12:50 PM, Shibu P U <shibu.pu at gmail.com> wrote:
>>>
>>>> If you have the reference variable, can't you dereference it and use?
>>>> For example, if $hashref is a hash reference, you can dereference it as
>>>> my %hash = %$hashref;
>>>>
>>>> Regards
>>>> Shibu P U
>>>>
>>>>
>>>> 2010/8/25 Bharathiraja P <pbrthemaster at gmail.com>
>>>>
>>>> I have a hash reference and if we print the reference variable we will
>>>>> get an address. I want to access the hash using that address.
>>>>>
>>>>> For ex. if $hash is a hash reference. If we print $hash we will get
>>>>> something like HASH(0x91498b8). I want to access the hash using the address
>>>>> HASH(0x91498b8).
>>>>>
>>>>> 2010/8/25 Varghese Chacko <vctheguru at gmail.com>
>>>>>
>>>>>  How do you get the memory address without any type info like
>>>>>> Array/Hash or Scalar? Are you trying to access ports?
>>>>>>
>>>>>> --VC
>>>>>>
>>>>>> Bharathiraja P wrote:
>>>>>>
>>>>>>  Hi,
>>>>>>
>>>>>>           Can you tell how can I map memory location to a variable.
>>>>>> For ex. I have a memory address for a hash reference say 0x23413. Is it
>>>>>> possible to access the hash using the memory address?
>>>>>>
>>>>>> --
>>>>>> Bharathiraja
>>>>>>
>>>>>> ------------------------------
>>>>>>
>>>>>> _______________________________________________
>>>>>> Kochi-pm mailing listKochi-pm at pm.orghttp://mail.pm.org/mailman/listinfo/kochi-pm
>>>>>>
>>>>>>
>>>>>>
>>>>>> --
>>>>>> Regards
>>>>>> Varghese Chacko
>>>>>>
>>>>>>
>>>>>> =========================================================
>>>>>> Unless you can create the WHOLE universe in 5 days, then
>>>>>> perhaps giving "advice" to God, isn't such a good idea.
>>>>>>
>>>>>>
>>>>>>
>>>>>> _______________________________________________
>>>>>> Kochi-pm mailing list
>>>>>> Kochi-pm at pm.org
>>>>>> http://mail.pm.org/mailman/listinfo/kochi-pm
>>>>>>
>>>>>>
>>>>>
>>>>> _______________________________________________
>>>>> Kochi-pm mailing list
>>>>> Kochi-pm at pm.org
>>>>> http://mail.pm.org/mailman/listinfo/kochi-pm
>>>>>
>>>>>
>>>>
>>>
>>
>
>
> --
> Regards
> Varghese Chacko
>
>
> =========================================================
> Unless you can create the WHOLE universe in 5 days, then
> perhaps giving "advice" to God, isn't such a good idea.
>
>
> _______________________________________________
> Kochi-pm mailing list
> Kochi-pm at pm.org
> http://mail.pm.org/mailman/listinfo/kochi-pm
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mail.pm.org/pipermail/kochi-pm/attachments/20100825/d3d59f32/attachment-0001.html>