4.115
Last change
on this file since 8ae37323 was
c499856,
checked in by Chris Johns <chrisj@…>, on 03/20/14 at 21:10:47
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Change all references of rtems.com to rtems.org.
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Property mode set to
100644
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File size:
1.2 KB
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1 | /** |
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2 | * @file score/src/timespectoticks.c |
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3 | */ |
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4 | |
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5 | /* |
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6 | * COPYRIGHT (c) 1989-2007. |
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7 | * On-Line Applications Research Corporation (OAR). |
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8 | * |
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9 | * The license and distribution terms for this file may be |
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10 | * found in the file LICENSE in this distribution or at |
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11 | * http://www.rtems.org/license/LICENSE. |
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12 | */ |
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13 | |
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14 | #if HAVE_CONFIG_H |
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15 | #include "config.h" |
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16 | #endif |
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17 | |
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18 | #include <rtems/score/timespec.h> |
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19 | #include <rtems/score/todimpl.h> |
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20 | #include <rtems/config.h> |
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21 | |
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22 | /** |
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23 | * |
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24 | * This routines converts a timespec to the corresponding number of ticks. |
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25 | */ |
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26 | |
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27 | uint32_t _Timespec_To_ticks( |
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28 | const struct timespec *time |
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29 | ) |
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30 | { |
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31 | uint32_t ticks; |
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32 | uint32_t nanoseconds_per_tick; |
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33 | |
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34 | if ( (time->tv_sec == 0) && (time->tv_nsec == 0) ) |
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35 | return 0; |
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36 | |
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37 | /** |
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38 | * We should ensure the ticks not be truncated by integer division. We |
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39 | * need to have it be greater than or equal to the requested time. It |
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40 | * should not be shorter. |
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41 | */ |
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42 | ticks = time->tv_sec * TOD_TICKS_PER_SECOND; |
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43 | nanoseconds_per_tick = rtems_configuration_get_nanoseconds_per_tick(); |
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44 | ticks += time->tv_nsec / nanoseconds_per_tick; |
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45 | |
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46 | if ( (time->tv_nsec % nanoseconds_per_tick) != 0 ) |
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47 | ticks += 1; |
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48 | |
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49 | return ticks; |
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50 | } |
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