Date: Thu, 27 Aug 1998 15:18:59 -0400 (EDT)
Message-Id: <199808271918.PAA16748@delorie.com>
From: DJ Delorie <dj AT delorie DOT com>
To: califax AT wupperonline DOT de
CC: djgpp AT delorie DOT com
In-reply-to: <35e59b79.420696@news.space.net> (califax@wupperonline.de)
Subject: Re: question to malloc and free
Precedence: bulk


> when I allocate a memory block with malloc and release it with free,
> how does free know how much it has to release? Stores malloc
> some information about the block?

The actual block in memory consists of a few extra words just before
what you get your hand on.  That extra bit contains the size of the
block, and maybe some other information if you're using a malloc
debugger.

Why not download the source and see for yourself?