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Date: Tue, 25 Apr 2006 23:26:17 +0300
From: Avi Kivity <avi@argo.co.il>
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To: Bongani Hlope <bhlope@mweb.co.za>
CC: Kyle Moffett <mrmacman_g4@mac.com>, Alan Cox <alan@lxorguk.ukuu.org.uk>,
       linux-kernel@vger.kernel.org
Subject: Re: Compiling C++ modules
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Bongani Hlope wrote:
> On Tuesday 25 April 2006 18:46, Avi Kivity wrote:
>   
>> Should you want to allocate from the heap, try this:
>>
>> {
>>     spinlock_t::guard g(some_lock);
>>     auto_ptr<Foo> item(new (gfp_mask) Foo);   /* or pass a kmem_cache_t */
>>     item->do_something();
>>     item->do_something_else();
>>     return item.release();
>> }
>>
>>     
>
> I love C++, but you have to stop it now. Imagine how many auto_ptr<Foo> will 
> you use inside your kernel. The compiler will need to create a separete class 
> for each. Using templates in the kernel will be plain silly.
>   
auto_ptr<>'s are fully inlined so their impact is nil.

(And actually I dislike C++, it only looks good next to C)

-- 
Do not meddle in the internals of kernels, for they are subtle and quick to panic.