1 | /* |
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2 | * Rate Monotonic Manager |
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3 | * |
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4 | * |
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5 | * COPYRIGHT (c) 1989-1999. |
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6 | * On-Line Applications Research Corporation (OAR). |
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7 | * |
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8 | * The license and distribution terms for this file may be |
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9 | * found in the file LICENSE in this distribution or at |
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10 | * http://www.OARcorp.com/rtems/license.html. |
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11 | * |
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12 | * $Id$ |
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13 | */ |
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14 | |
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15 | #include <rtems/system.h> |
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16 | #include <rtems/rtems/status.h> |
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17 | #include <rtems/rtems/support.h> |
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18 | #include <rtems/score/isr.h> |
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19 | #include <rtems/score/object.h> |
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20 | #include <rtems/rtems/ratemon.h> |
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21 | #include <rtems/score/thread.h> |
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22 | |
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23 | /*PAGE |
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24 | * |
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25 | * rtems_rate_monotonic_get_status |
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26 | * |
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27 | * This directive allows a thread to obtain status information on a |
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28 | * period. |
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29 | * |
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30 | * Input parameters: |
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31 | * id - rate monotonic id |
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32 | * status - pointer to status control block |
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33 | * |
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34 | * Output parameters: |
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35 | * RTEMS_SUCCESSFUL - if successful |
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36 | * error code - if unsuccessful |
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37 | * |
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38 | */ |
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39 | |
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40 | rtems_status_code rtems_rate_monotonic_get_status( |
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41 | Objects_Id id, |
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42 | rtems_rate_monotonic_period_status *status |
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43 | ) |
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44 | { |
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45 | Objects_Locations location; |
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46 | Rate_monotonic_Control *the_period; |
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47 | |
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48 | if ( status == NULL ) |
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49 | return RTEMS_INVALID_ADDRESS; |
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50 | |
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51 | the_period = _Rate_monotonic_Get( id, &location ); |
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52 | switch ( location ) { |
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53 | case OBJECTS_REMOTE: /* should never return this */ |
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54 | return RTEMS_INTERNAL_ERROR; |
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55 | |
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56 | case OBJECTS_ERROR: |
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57 | return RTEMS_INVALID_ID; |
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58 | |
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59 | case OBJECTS_LOCAL: |
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60 | status->state = the_period->state; |
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61 | |
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62 | if ( status->state == RATE_MONOTONIC_INACTIVE ) { |
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63 | status->ticks_since_last_period = 0; |
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64 | status->ticks_executed_since_last_period = 0; |
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65 | } else { |
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66 | status->ticks_since_last_period = |
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67 | _Watchdog_Ticks_since_boot - the_period->time_at_period; |
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68 | |
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69 | status->ticks_executed_since_last_period = |
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70 | the_period->owner->ticks_executed - |
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71 | the_period->owner_ticks_executed_at_period; |
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72 | } |
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73 | |
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74 | _Thread_Enable_dispatch(); |
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75 | return RTEMS_SUCCESSFUL; |
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76 | } |
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77 | |
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78 | return RTEMS_INTERNAL_ERROR; /* unreached - only to remove warnings */ |
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79 | } |
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