Re: Compiling C++ modules

["linux-os \(Dick Johnson\)" <linux-os@analogic.com>]

On Tue, 25 Apr 2006, Avi Kivity wrote:

> Dmitry Torokhov wrote:
>>>>     TakeLock l(&lock);
>>>>
>>>>     do_something();
>>>>     do_something_else();
>>>>
>>>> First of all, that extra TakeLock object chews up stack, at least 4 or
>>>> 8 bytes of it, depending on your word size.
>>>>
>>> No, it's optimized out. gcc notices that &lock doesn't change and that
>>> 'l' never escapes the function.
>>>
>>
>> "l" that propects critical section gets thrown away???
> Calm down, the storage for 'l' is thrown away, but its effects remain.
>> What is the
>> name of the filesystem you ported? I mean, I need to know so I don't
>> use it by accident.
>>
> It's very expensive, you can't use it by accident.

Class Kernel
{
public:
     virtual void starter(Scheduler *current) = 0x00;
};

Okay, I just started your new C++ kernel! Please send email when it
is done. I will help test it.

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

Cheers,
Dick Johnson
Penguin : Linux version 2.6.16.4 on an i686 machine (5592.89 BogoMips).
Warning : 98.36% of all statistics are fiction, book release in April.
_


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