linux-kernel - Re: [RFC PATCH] type safe allocator

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Date:	Wed, 01 Aug 2007 11:57:06 +0200
From:	Miklos Szeredi <miklos@...redi.hu>
To:	andi@...stfloor.org
CC:	miklos@...redi.hu, linux-kernel@...r.kernel.org,
	linux-mm@...ck.org, akpm@...ux-foundation.org,
	torvalds@...ux-foundation.org
Subject: Re: [RFC PATCH] type safe allocator

> > I wonder why we don't have type safe object allocators a-la new() in
> > C++ or g_new() in glib?
> > 
> >   fooptr = k_new(struct foo, GFP_KERNEL);
> > 
> > is nicer and more descriptive than
> > 
> >   fooptr = kmalloc(sizeof(*fooptr), GFP_KERNEL);
> > 
> > and more safe than
> > 
> >   fooptr = kmalloc(sizeof(struct foo), GFP_KERNEL);
> 
> How is it more safe? It seems 100% equivalent to me,
> just a different syntax.

Note the (type *) cast:

#define k_new(type, flags) ((type *) kmalloc(sizeof(type), flags))

Miklos
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