4.104.114.84.95
Last change
on this file since ba16717 was
ba16717,
checked in by Joel Sherrill <joel.sherrill@…>, on 11/15/06 at 15:34:45
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2006-11-15 Joel Sherrill <joel.sherrill@…>
- posix/Makefile.am: Add file missed in previous commit.
- posix/src/posixtimespecabsolutetimeout.c: New file.
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-
Property mode set to
100644
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File size:
1.3 KB
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1 | /* |
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2 | * Convert abstime timeout to ticks |
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3 | * |
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4 | * $Id$ |
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5 | */ |
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6 | |
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7 | #if HAVE_CONFIG_H |
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8 | #include "config.h" |
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9 | #endif |
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10 | |
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11 | #include <stdarg.h> |
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12 | |
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13 | #include <errno.h> |
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14 | #include <fcntl.h> |
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15 | #include <pthread.h> |
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16 | #include <semaphore.h> |
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17 | #include <limits.h> |
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18 | |
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19 | #include <rtems/system.h> |
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20 | #include <rtems/score/object.h> |
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21 | #include <rtems/posix/semaphore.h> |
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22 | #include <rtems/posix/time.h> |
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23 | #include <rtems/seterr.h> |
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24 | |
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25 | /* |
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26 | * The abstime is a walltime. We turn it into an interval. |
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27 | */ |
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28 | int _POSIX_Absolute_timeout_to_ticks( |
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29 | const struct timespec *abstime, |
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30 | Watchdog_Interval *ticks_out |
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31 | ) |
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32 | { |
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33 | struct timespec current_time; |
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34 | struct timespec difference; |
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35 | |
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36 | if ( !abstime ) |
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37 | return EINVAL; |
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38 | |
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39 | /* |
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40 | * Error check the absolute time to timeout |
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41 | */ |
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42 | #if 0 |
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43 | /* they are unsigned so this is impossible */ |
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44 | if ( abstime->tv_sec < 0 || abstime->tv_nsec < 0 ) |
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45 | return EINVAL; |
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46 | #endif |
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47 | |
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48 | if ( abstime->tv_nsec >= TOD_NANOSECONDS_PER_SECOND ) |
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49 | return EINVAL; |
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50 | |
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51 | (void) clock_gettime( CLOCK_REALTIME, ¤t_time ); |
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52 | |
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53 | /* |
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54 | * Make sure the abstime is in the future |
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55 | */ |
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56 | if ( abstime->tv_sec < current_time.tv_sec ) |
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57 | return EINVAL; |
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58 | |
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59 | if ( (abstime->tv_sec == current_time.tv_sec) && |
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60 | (abstime->tv_nsec <= current_time.tv_nsec) ) |
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61 | return EINVAL; |
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62 | |
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63 | _POSIX_Timespec_subtract( ¤t_time, abstime, &difference ); |
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64 | |
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65 | *ticks_out = _POSIX_Timespec_to_interval( &difference ); |
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66 | |
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67 | return 0; |
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68 | } |
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69 | |
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