diff options
author | Joel Sherrill <joel.sherrill@OARcorp.com> | 2007-05-16 15:04:25 +0000 |
---|---|---|
committer | Joel Sherrill <joel.sherrill@OARcorp.com> | 2007-05-16 15:04:25 +0000 |
commit | f919582d8faf16aa161982aa0201c115e15365f4 (patch) | |
tree | 559439c6cff1a482d77b24fe349dab4f48ddc7f1 /cpukit/score/src/timespecdivide.c | |
parent | 2007-05-16 Ralf Corsépius <ralf.corsepius@rtems.org> (diff) | |
download | rtems-f919582d8faf16aa161982aa0201c115e15365f4.tar.bz2 |
2007-05-16 Joel Sherrill <joel.sherrill@oarcorp.com>
* score/Makefile.am, score/include/rtems/score/timespec.h: Add division
and greater than operations for timespecs.
* score/src/timespecdivide.c, score/src/timespecgreaterthan.c:
New files.
Diffstat (limited to 'cpukit/score/src/timespecdivide.c')
-rw-r--r-- | cpukit/score/src/timespecdivide.c | 52 |
1 files changed, 52 insertions, 0 deletions
diff --git a/cpukit/score/src/timespecdivide.c b/cpukit/score/src/timespecdivide.c new file mode 100644 index 0000000000..0535c22e11 --- /dev/null +++ b/cpukit/score/src/timespecdivide.c @@ -0,0 +1,52 @@ +/** + * @file score/src/timespecdivide.c + */ + +/* + * COPYRIGHT (c) 1989-2007. + * On-Line Applications Research Corporation (OAR). + * + * The license and distribution terms for this file may be + * found in the file LICENSE in this distribution or at + * http://www.rtems.com/license/LICENSE. + * + * $Id$ + */ + +#if HAVE_CONFIG_H +#include "config.h" +#endif + +#include <rtems/system.h> +#include <sys/types.h> +#include <rtems/score/timespec.h> +#include <rtems/score/tod.h> + +void _Timespec_Divide( + const struct timespec *time, + uint32_t iterations, + struct timespec *result +) +{ + uint64_t t; + + /* + * For math simplicity just convert the timespec to nanoseconds + * in a 64-bit integer. + */ + t = time->tv_sec * TOD_NANOSECONDS_PER_SECOND; + t += time->tv_nsec; + + /* + * Divide to get nanoseconds per iteration + */ + + t /= iterations; + + /* + * Put it back in the timespec result + */ + + result->tv_sec = t / TOD_NANOSECONDS_PER_SECOND; + result->tv_nsec = t % TOD_NANOSECONDS_PER_SECOND; +} |