Date: Thu, 8 Nov 2001 11:07:23 +0200 (IST)
From: Eli Zaretskii <eliz AT is DOT elta DOT co DOT il>
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To: Raf256 <raf256 AT go2 DOT pl>
cc: djgpp AT delorie DOT com
Subject: Re: sizeof void* ?
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On Thu, 8 Nov 2001, Raf256 wrote:

> I have memor area like :
> void *ptr = malloc(1024);
> realloc(ptr, ???);
> 
> how can I here check current size of memory block that begins in ptr ?

You can't; not portably, anyway: there's no standard function to return 
that info.

The usual technique is to store the allocated size in a separate 
variable.