libgloss/arm clock [PATCH]

[Jeff Johnston]

Patch checked in with minor modification (I added a prototype for _clock 
as was done for _isatty).

-- Jeff J.

Shaun Jackman wrote:
> This patch provides clock, sleep, and usleep for libgloss/arm. Please apply.
> 
> Cheers,
> Shaun
> 
> 2005-11-28  Shaun Jackman  <sjackman@gmail.com>
> 
> 	* arm/libcfunc.c (clock, sleep, usleep): New function.
> 	* arm/syscalls.c (_clock): New function.
> 	(_times): Call clock.
> 
> Index: arm/libcfunc.c
> ===================================================================
> RCS file: /cvs/src/src/libgloss/arm/libcfunc.c,v
> retrieving revision 1.5
> diff -u -r1.5 libcfunc.c
> --- arm/libcfunc.c	17 Nov 2005 18:56:41 -0000	1.5
> +++ arm/libcfunc.c	28 Nov 2005 20:18:25 -0000
> @@ -43,6 +43,12 @@
>  	return 0;
>  }
> 
> +clock_t __attribute__((weak))
> +clock (void)
> +{
> +	return _clock();
> +}
> +
>   int _isatty(int fildes);
>  int __attribute__((weak))
>   isatty(int fildes)
> @@ -56,3 +62,26 @@
>   	errno = ENOSYS;
>  	return -1;
>  }
> +
> +#include <sys/types.h>
> +#include <time.h>
> +
> +unsigned __attribute__((weak))
> +sleep(unsigned seconds)
> +{
> +	clock_t t0 = _clock();
> +	clock_t dt = seconds * CLOCKS_PER_SEC;
> +
> +	while (_clock() - t0  < dt);
> +	return 0;
> +}
> +
> +int __attribute__((weak))
> +usleep(useconds_t useconds)
> +{
> +	clock_t t0 = _clock();
> +	clock_t dt = useconds / (1000000/CLOCKS_PER_SEC);
> +
> +	while (_clock() - t0  < dt);
> +	return 0;
> +}
> Index: arm/syscalls.c
> ===================================================================
> RCS file: /cvs/src/src/libgloss/arm/syscalls.c,v
> retrieving revision 1.7
> diff -u -r1.7 syscalls.c
> --- arm/syscalls.c	16 Aug 2005 18:05:35 -0000	1.7
> +++ arm/syscalls.c	28 Nov 2005 20:18:25 -0000
> @@ -596,8 +596,8 @@
>  }
> 
>  /* Return a clock that ticks at 100Hz.  */
> -clock_t
> -_times (struct tms * tp)
> +clock_t
> +_clock(void)
>  {
>    clock_t timeval;
> 
> @@ -606,6 +606,14 @@
>  #else
>    asm ("swi %a1; mov %0, r0" : "=r" (timeval): "i" (SWI_Clock) : "r0");
>  #endif
> +  return timeval;
> +}
> +
> +/* Return a clock that ticks at 100Hz.  */
> +clock_t
> +_times (struct tms * tp)
> +{
> +  clock_t timeval = _clock();
> 
>    if (tp)
>      {