4.104.114.84.95
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1 | /* |
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2 | * 3.4.1 Schedule Alarm, P1003.1b-1993, p. 79 |
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3 | * |
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4 | * COPYRIGHT (c) 1989-1999. |
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5 | * On-Line Applications Research Corporation (OAR). |
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6 | * |
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7 | * The license and distribution terms for this file may be |
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8 | * found in the file LICENSE in this distribution or at |
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9 | * http://www.OARcorp.com/rtems/license.html. |
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10 | * |
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11 | * $Id$ |
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12 | */ |
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13 | |
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14 | |
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15 | #include <pthread.h> |
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16 | #include <errno.h> |
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17 | |
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18 | #include <rtems/system.h> |
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19 | #include <rtems/posix/pthread.h> |
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20 | #include <rtems/posix/psignal.h> |
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21 | |
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22 | unsigned int alarm( |
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23 | unsigned int seconds |
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24 | ) |
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25 | { |
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26 | unsigned int remaining = 0; |
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27 | Watchdog_Control *the_timer; |
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28 | |
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29 | the_timer = &_POSIX_signals_Alarm_timer; |
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30 | |
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31 | switch ( _Watchdog_Remove( the_timer ) ) { |
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32 | case WATCHDOG_INACTIVE: |
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33 | case WATCHDOG_BEING_INSERTED: |
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34 | break; |
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35 | |
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36 | case WATCHDOG_ACTIVE: |
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37 | case WATCHDOG_REMOVE_IT: |
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38 | remaining = the_timer->initial - |
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39 | (the_timer->stop_time - the_timer->start_time); |
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40 | break; |
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41 | } |
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42 | |
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43 | _Watchdog_Insert_seconds( the_timer, seconds ); |
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44 | |
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45 | return remaining; |
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46 | } |
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47 | |
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