Re: [Dev-C++] malloc and free

[Gil <gil...@fr...>]

free(ptr) cannot put ptr to NULL, simply because you don't pass the
address of ptr.

If you would that all you ptr that are freed, are set to NULL. Define a
fonction that do:

void freeN(void **ptr) {
 free(*ptr);
 ptr =3D NULL;
}





Date: Sat, 10 Jan 2004 17:43:05 +0100
From: =3D?ISO-8859-1?Q?OROSZI_Bal=3DE1zs?=3D <or...@vp...>
To: dev...@li...
Subject: Re: [Dev-C++] malloc and free

Siva Chandra wrote:
> firstly, thanx Daniel and Oroszi
"Bal=E1zs" - that's my firstname, written at second place (we Hungarians =

are "crazy" people - or maybe everyone else is, except us? :D

> for the descriptive
> replyies. I have always thought free(ptr) would put
> ptr to NULL.

I think you cannot even assume that anywhere. The docs of free() only=20
tell you, that the memory is freed. However, maybe it's a documentation=20
"bug", it doesn't state explicitly that free() is NOT GUARANTEED to put=20
NULL to the deallocated memory (probably because of performance
reasons).

--
Greetings,
   Bal=E1zs

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