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Message-ID: <20150829171730.GE7833@brightrain.aerifal.cx>
Date: Sat, 29 Aug 2015 13:17:30 -0400
From: Rich Felker <dalias@...c.org>
To: musl@...ts.openwall.com
Subject: Re: [PATCH 2/2] make the number of spins tuneable

On Sat, Aug 29, 2015 at 10:51:15AM +0200, Jens Gustedt wrote:
> ---
>  src/thread/__wait.c | 8 +++++++-
>  1 file changed, 7 insertions(+), 1 deletion(-)
> 
> diff --git a/src/thread/__wait.c b/src/thread/__wait.c
> index a93d41d..46501cb 100644
> --- a/src/thread/__wait.c
> +++ b/src/thread/__wait.c
> @@ -1,8 +1,14 @@
>  #include "pthread_impl.h"
>  
> +#ifndef __WAIT_SPINS
> +# define __WAIT_SPINS 100
> +#endif
> +
> +int __wait_spins = __WAIT_SPINS;
> +
>  void __wait(volatile int *addr, volatile int *waiters, int val, int priv)
>  {
> -	int spins=100;
> +	int spins=__wait_spins;
>  	if (priv) priv = FUTEX_PRIVATE;
>  	while (spins--) {
>  		if (*addr==val) a_spin();
> -- 
> 2.1.4

I don't understand the intended usage. This is not suitable as a
public API.

Rich

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