l i n u x - u s e r s - g r o u p - o f - d a v i s
L U G O D
 
Next Meeting:
November 4: Social gathering
Next Installfest:
TBD
Latest News:
Oct. 10: LUGOD Installfests coming again soon
Page last updated:
2002 May 09 00:59

The following is an archive of a post made to our 'vox-tech mailing list' by one of its subscribers.

Report this post as spam:

(Enter your email address)
Re: [vox-tech] Must one free() in C?
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: [vox-tech] Must one free() in C?



On Wed, 2002-05-08 at 11:34, Mark K. Kim wrote:
> It's not a Linux specific question, for it matters not the answer under
> Linux for Linux frees regardless of one's intervention, but 'tis a valid
> question so I believe...
> 
> Let's say you got a code like this (in C):
> 
>    tmp1 = (int*)malloc(5);
>    tmp2 = (int*)malloc(6);
>    if(!tmp1 || !tmp2)
>    {
>       fprintf(stderr, "Out of memory!\n");
>       exit(1);
>    }
> 
> If tmp1 is allocated (but not tmp2) at the time of exit(1), is it
> guaranteed to be freed by the exiting process?  Or does one must free tmp1
> before exitting?  The answer doesn't really matter on Linux (or most
> modern systems, I suppose)  since it frees memory nonetheless, but is that
> the standard?  The impliciation of requiring calls to free() before
> exitting is enormous -- one would have to keep track of all the allocated
> memory before exitting from any error condition!

It isn't guaranteed, but modern OSses will indeed free the process'
memory after it exits.  But a little guarantee of success isn't better
than a guarantee of failure, in my book.  I do indeed keep track of all
allocated memory. Gives me that feeling of "job well done".

Micah

_______________________________________________
vox-tech mailing list
vox-tech@lists.lugod.org
http://lists.lugod.org/mailman/listinfo/vox-tech



LinkedIn
LUGOD Group on LinkedIn
Sign up for LUGOD event announcements
Your email address:
facebook
LUGOD Group on Facebook
'Like' LUGOD on Facebook:

Hosting provided by:
Sunset Systems
Sunset Systems offers preconfigured Linux systems, remote system administration and custom software development.

LUGOD: Linux Users' Group of Davis
PO Box 2082, Davis, CA 95617
Contact Us

LUGOD is a 501(c)7 non-profit organization
based in Davis, California
and serving the Sacramento area.
"Linux" is a trademark of Linus Torvalds.

Sponsored in part by:
Appahost Applications
For a significant contribution towards our projector, and a generous donation to allow us to continue meeting at the Davis Library.