unchecked_deallocation

unchecked_deallocation

[Felix Engemann]

Hi all,

I'm just writing a generic double linked list package.
I want to implement a function destroy_list, wich should return null
and free the space. My question is:

is all the space freed, if i set a pointer to the first node and then free the
space with free(pointer_to_first_node)

or do i have to delete and free from node to node, in order to free all the
space ?

Thanx Felix

Re: unchecked_deallocation

[Larry Hazel]

Felix Engemann wrote:
> Hi all,
> 
> I'm just writing a generic double linked list package.
> I want to implement a function destroy_list, wich should return null
> and free the space. My question is:
> 
> is all the space freed, if i set a pointer to the first node and then free the
> space with free(pointer_to_first_node)
> 
> or do i have to delete and free from node to node, in order to free all the
> space ?
> 
> Thanx Felix

You must deallocate every node individually.  Use a recursive procedure (not a 
function) to do this.  Returning a null pointer serves no purpose.

Larry

Re: unchecked_deallocation

[Jan Prazak]

On Wed, 17 Jul 2002 17:07:12 -0100, Felix Engemann wrote:

> Hi all,

You should read the postings under "access / freeing memory", I have
asked a very similar question.

Jan

Re: unchecked_deallocation

[Felix Engemann]

Jan Prazak <janp9@gmx.net> wrote in message news:<pan.2002.07.17.20.42.39.581807.1851@gmx.net>...
> On Wed, 17 Jul 2002 17:07:12 -0100, Felix Engemann wrote:
> 
> > Hi all,
> 
> You should read the postings under "access / freeing memory", I have
> asked a very similar question.
> 
> Jan

Thanx i've seen it just too late!

Unchecked_Deallocation

[robinsoj]

Has anyone ever heard of "Unchecked_Deallocation?"  If so, what is it?

--
James H. Robinson, III

-----------== Posted via Deja News, The Discussion Network ==----------
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Re: Unchecked_Deallocation

[Tom Moran]

>Has anyone ever heard of "Unchecked_Deallocation?"  If so, what is it?
Look in any Ada text or reference manual.  It's similar to Free.

Re: Unchecked_Deallocation

[Fanni Kolchina]

robinsoj@my-dejanews.com wrote:
: Has anyone ever heard of "Unchecked_Deallocation?"  If so, what is it?
: 
: --
: James H. Robinson, III
: 
: -----------== Posted via Deja News, The Discussion Network ==----------
: http://www.dejanews.com/       Search, Read, Discuss, or Start Your Own    

-- 
Fanni Kolchina	kolc7797@sparky.cs.nyu.edu
Computer Science Department
Courant Institute of Mathematical Sciences

Unchecked_Deallocation

[Scott Barrish]

Ada Professionals:

According to my professor's handout's and lecture notes, I should be able
to do the following:

--Scott Barrish
--CPSC-151
--Professor P. Williams
--October 23, 1997

--First Created:  October 21, 1997 6:45pm
--Last Revised:	  October 21, 1997 6:45pm

with Ada.Text_IO;	use Ada.Text_IO;

package body Stack_Dynamic is

procedure Free is new Unchecked_Deallocation(Object => Element_Type, Name
=> Stack_Ptr);

.
.
.

However, when I goto compile in Dubug mode, the compiler complains and says
that Unchecked_Deallocation is not found.  Ingnoring future references.

I thought that Unchecked_Deallocation is a generic procedure found in
Ada.Text_IO.  If I am wrong, please help me in fixing this part ofmy code.

I thank you a head of time for your help.

Sincerely,

Scott B.

P.S.  E-mail your reply.  My news server is very slow.

Re: Unchecked_Deallocation

[bklungle]

Try:
with Unchecked_Deallocation;  -- Put it about at ***

Scott Barrish <TKEFUFU@icontech.com> wrote in article
<01bcde95$f171ed40$214ec7d0@tkefufu.static>...
> Ada Professionals:
> 
> According to my professor's handout's and lecture notes, I should be able
> to do the following:
> 
> --Scott Barrish
> --CPSC-151
> --Professor P. Williams
> --October 23, 1997
> 
> --First Created:  October 21, 1997 6:45pm
> --Last Revised:	  October 21, 1997 6:45pm
> 
> with Ada.Text_IO;	use Ada.Text_IO;
with Unchecked_Deallocation;   -- ***
> 
> package body Stack_Dynamic is
> 
> procedure Free is new Unchecked_Deallocation(Object => Element_Type, Name
> => Stack_Ptr);
> 
> .
> .
> .
> 
> However, when I goto compile in Dubug mode, the compiler complains and
says
> that Unchecked_Deallocation is not found.  Ingnoring future references.
> 
> I thought that Unchecked_Deallocation is a generic procedure found in
> Ada.Text_IO.  If I am wrong, please help me in fixing this part ofmy
code.
> 
> I thank you a head of time for your help.
> 
> Sincerely,
> 
> Scott B.
> 
> P.S.  E-mail your reply.  My news server is very slow.
> 
> 

Re: Unchecked_Deallocation

[Anonymous]

On 22 Oct 97 00:11:34 GMT, "Scott Barrish" <TKEFUFU@icontech.com> wrote:

>...
> I thought that Unchecked_Deallocation is a generic procedure found in
> Ada.Text_IO.  If I am wrong, please help me in fixing this part ofmy code.
> 

Have you asked your professor about this? That should be your first line
of inquiry.

Ada.Unchecked_Deallocation is indeed a generic procedure. It has nothing
to do with Ada.Text_Io (other than both being children of Ada). If you
mention it in a context clause your instantiation should compile fine.

Jeff Carter  PGP:1024/440FBE21
My real e-mail address: ( carter @ innocon . com )
"Now go away or I shall taunt you a second time."
Monty Python & the Holy Grail

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