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

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Message-Id: <1186063605.8085.82.camel@tara.firmix.at>
Date:	Thu, 02 Aug 2007 16:06:45 +0200
From:	Bernd Petrovitsch <bernd@...mix.at>
To:	Peter Zijlstra <peterz@...radead.org>
Cc:	Alexey Dobriyan <adobriyan@...il.com>,
	Miklos Szeredi <miklos@...redi.hu>, akpm@...ux-foundation.org,
	linux-kernel@...r.kernel.org, linux-mm@...ck.org,
	torvalds@...ux-foundation.org
Subject: Re: [PATCH] type safe allocator

On Thu, 2007-08-02 at 15:47 +0200, Peter Zijlstra wrote:
> On Thu, 2007-08-02 at 16:04 +0400, Alexey Dobriyan wrote:
> > On 8/2/07, Miklos Szeredi <miklos@...redi.hu> wrote:
> > > The linux kernel doesn't have a type safe object allocator a-la new()
> > > in C++ or g_new() in glib.
> > >
> > > Introduce two helpers for this purpose:
> > >
> > >    alloc_struct(type, gfp_flags);
> > >
> > >    zalloc_struct(type, gfp_flags);
> > 
> > ick.
> > 
> > > These macros take a type name (usually a 'struct foo') as first
> > > argument
> > 
> > So one has to type struct twice.
> 
> thrice in some cases like alloc_struct(struct task_struct, GFP_KERNEL)

Save the explicit "struct" and put it into the macro (and force people
to not use typedefs).

#define alloc_struct(type, flags) ((type *)kmalloc(sizeof(struct type), (flags)))

Obious drawback: We may need alloc_union().

SCNR ...
	Bernd
-- 
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