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Date: Fri, 05 Sep 2008 11:40:54 +0200
From: Gilles Chanteperdrix <gilles.chanteperdrix@xenomai.org>
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Subject: Re: [Xenomai-core] [PATCH 2/9] Switch to handle-based fast mutex
 owners	- v2
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To: Jan Kiszka <jan.kiszka@domain.hid>
Cc: xenomai-core <xenomai@xenomai.org>

Jan Kiszka wrote:
> @@ -230,18 +230,20 @@ static inline int mutex_save_count(xnthr
>  
>  	mutex = shadow->mutex;
>  
> -	if (clear_claimed(xnarch_atomic_intptr_get(mutex->owner)) != cur)
> +	if (clear_claimed(xnarch_atomic_get(mutex->owner)) !=
> +	    xnthread_handle(cur))
>  		return EPERM;
>  
>  	*count_ptr = shadow->lockcnt;
>  
> -	if (likely(xnarch_atomic_intptr_cmpxchg(mutex->owner, cur, NULL) == cur))
> +	if (likely(xnarch_atomic_cmpxchg(mutex->owner, cur, XN_NO_HANDLE) ==
> +		   xnthread_handle(cur)))
>  		return 0;
>  
>  	owner = xnsynch_wakeup_one_sleeper(&mutex->synchbase);
> -	xnarch_atomic_intptr_set
> -		(mutex->owner,
> -		 set_claimed(owner,xnsynch_nsleepers(&mutex->synchbase)));
> +	xnarch_atomic_set(mutex->owner,
> +			  set_claimed(xnthread_handle(owner),
> +				      xnsynch_nsleepers(&mutex->synchbase)));

Ok. Can we avoid xnthread_handle() everywhere by storing its result in a
local variable and reusing this local variable, here and in the other
functions where xnthread_handle is used multiple times ?

-- 
                                                 Gilles.