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authorJoel Sherrill <joel.sherrill@OARcorp.com>2007-05-16 15:04:25 +0000
committerJoel Sherrill <joel.sherrill@OARcorp.com>2007-05-16 15:04:25 +0000
commitf919582d8faf16aa161982aa0201c115e15365f4 (patch)
tree559439c6cff1a482d77b24fe349dab4f48ddc7f1 /cpukit/score/src/timespecdivide.c
parent2007-05-16 Ralf Corsépius <ralf.corsepius@rtems.org> (diff)
downloadrtems-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')
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diff --git a/cpukit/score/src/timespecdivide.c b/cpukit/score/src/timespecdivide.c
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+/**
+ * @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;
+}