[PATCH_v2] use CLOCK_MONOTONIC_COARSE posix timer instead of CLOCK_MONOTONIC in Xorg

[Yaakov (Cygwin/X)]

On Fri, 2010-08-27 at 09:20 +0800, Zhao Yakui wrote:
> diff --git a/os/utils.c b/os/utils.c
> index 51455cc..a37a99d 100644
> --- a/os/utils.c
> +++ b/os/utils.c
> @@ -427,7 +427,17 @@ GetTimeInMillis(void)
>  
>  #ifdef MONOTONIC_CLOCK
>      struct timespec tp;
> -    if (clock_gettime(CLOCK_MONOTONIC, &tp) == 0)
> +    static clockid_t clockid;
> +    if (!clockid) {
> +#if defined(__linux__) && defined(CLOCK_MONONOTIC_COARSE)

s/MONONOTIC/MONOTONIC/

But shouldn't that just be #ifdef CLOCK_MONOTONIC_COARSE?  What if
another system besides Linux implements it?

> +	if ((clock_getres(CLOCK_MONOTONIC_COARSE, &tp) == 0) &&
> +		(tp.tv_nsec / 1000 <= 1000))
> +	    clockid = CLOCK_MONOTONIC_COARSE;
> +	else
> +#endif
> +	clockid = CLOCK_MONOTONIC;
> +     }
> +    if (clock_gettime(clockid, &tp) == 0)
>          return (tp.tv_sec * 1000) + (tp.tv_nsec / 1000000L);
>  #endif
>  


Yaakov
Cygwin/X