4.115
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1 | /** |
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2 | * @file |
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3 | * |
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4 | * @brief Limits for Scheduling Parameter |
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5 | * @ingroup POSIXAPI |
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6 | */ |
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7 | |
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8 | /* |
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9 | * 13.3.6 Get Scheduling Parameter Limits, P1003.1b-1993, p. 258 |
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10 | * |
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11 | * COPYRIGHT (c) 1989-2007. |
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12 | * On-Line Applications Research Corporation (OAR). |
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13 | * |
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14 | * The license and distribution terms for this file may be |
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15 | * found in the file LICENSE in this distribution or at |
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16 | * http://www.rtems.com/license/LICENSE. |
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17 | */ |
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18 | |
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19 | #if HAVE_CONFIG_H |
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20 | #include "config.h" |
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21 | #endif |
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22 | |
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23 | #include <unistd.h> /* getpid */ |
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24 | #include <sched.h> |
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25 | #include <errno.h> |
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26 | |
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27 | #include <rtems/system.h> |
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28 | #include <rtems/score/tod.h> |
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29 | #include <rtems/score/thread.h> |
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30 | #include <rtems/score/timespec.h> |
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31 | #include <rtems/seterr.h> |
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32 | |
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33 | int sched_rr_get_interval( |
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34 | pid_t pid, |
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35 | struct timespec *interval |
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36 | ) |
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37 | { |
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38 | /* |
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39 | * Only supported for the "calling process" (i.e. this node). |
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40 | */ |
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41 | |
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42 | if ( pid && pid != getpid() ) |
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43 | rtems_set_errno_and_return_minus_one( ESRCH ); |
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44 | |
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45 | if ( !interval ) |
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46 | rtems_set_errno_and_return_minus_one( EINVAL ); |
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47 | |
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48 | _Timespec_From_ticks( _Thread_Ticks_per_timeslice, interval ); |
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49 | return 0; |
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50 | } |
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