Path: utzoo!attcan!utgpu!jarvis.csri.toronto.edu!rutgers!dptg!att!cbnewsl!dfp
From: dfp@cbnewsl.ATT.COM (david.f.prosser)
Newsgroups: comp.lang.c
Subject: Re: What happens when realloc() returns NULL?
Message-ID: <1707@cbnewsl.ATT.COM>
Date: 31 Aug 89 15:23:59 GMT
References: <TOM.89Aug30231415@yang.cpac.washington.edu>
Reply-To: dfp@cbnewsl.ATT.COM (david.f.prosser)
Organization: AT&T Bell Laboratories
Lines: 14

In article <TOM.89Aug30231415@yang.cpac.washington.edu> tom@yang.cpac.washington.edu (Tom May) writes:
>If I do this:
>	char *p1, *p2;
>	p1 = malloc (100);
>	p2 = realloc (p1, 200);
>and malloc() returns non-NULL, but realloc() returns NULL, is the memory
>pointed to by p1 still allocated?

Section 4.10.3.4 (the realloc function), page 156, lines 23-24:

	"If the space cannot be allocated, the object pointed to by ptr
	[the first parameter] is unchanged."

Dave Prosser	...not an official X3J11 answer...