1 | /** |
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2 | * @file |
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3 | * |
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4 | * @brief RTEMS Timer Server Fire When Directive |
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5 | * @ingroup ClassicTimer Timers |
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6 | */ |
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7 | |
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8 | /* |
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9 | * COPYRIGHT (c) 1989-2007. |
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10 | * On-Line Applications Research Corporation (OAR). |
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11 | * |
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12 | * The license and distribution terms for this file may be |
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13 | * found in the file LICENSE in this distribution or at |
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14 | * http://www.rtems.com/license/LICENSE. |
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15 | */ |
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16 | |
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17 | #if HAVE_CONFIG_H |
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18 | #include "config.h" |
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19 | #endif |
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20 | |
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21 | #include <rtems/system.h> |
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22 | #include <rtems/rtems/status.h> |
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23 | #include <rtems/rtems/support.h> |
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24 | #include <rtems/score/object.h> |
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25 | #include <rtems/score/thread.h> |
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26 | #include <rtems/rtems/timer.h> |
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27 | #include <rtems/score/tod.h> |
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28 | #include <rtems/score/watchdog.h> |
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29 | |
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30 | /* |
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31 | * rtems_timer_server_fire_when |
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32 | * |
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33 | * This directive allows a thread to start a timer which will by |
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34 | * executed by the Timer Server when it fires. |
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35 | * |
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36 | * Input parameters: |
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37 | * id - timer id |
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38 | * wall_time - time of day to fire timer |
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39 | * routine - routine to schedule |
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40 | * user_data - passed as argument to routine when it is fired |
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41 | * |
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42 | * Output parameters: |
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43 | * RTEMS_SUCCESSFUL - if successful |
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44 | * error code - if unsuccessful |
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45 | */ |
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46 | |
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47 | rtems_status_code rtems_timer_server_fire_when( |
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48 | rtems_id id, |
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49 | rtems_time_of_day *wall_time, |
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50 | rtems_timer_service_routine_entry routine, |
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51 | void *user_data |
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52 | ) |
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53 | { |
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54 | Timer_Control *the_timer; |
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55 | Objects_Locations location; |
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56 | rtems_interval seconds; |
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57 | Timer_server_Control *timer_server = _Timer_server; |
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58 | |
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59 | if ( !timer_server ) |
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60 | return RTEMS_INCORRECT_STATE; |
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61 | |
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62 | if ( !_TOD.is_set ) |
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63 | return RTEMS_NOT_DEFINED; |
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64 | |
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65 | if ( !routine ) |
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66 | return RTEMS_INVALID_ADDRESS; |
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67 | |
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68 | if ( !_TOD_Validate( wall_time ) ) |
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69 | return RTEMS_INVALID_CLOCK; |
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70 | |
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71 | seconds = _TOD_To_seconds( wall_time ); |
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72 | if ( seconds <= _TOD_Seconds_since_epoch() ) |
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73 | return RTEMS_INVALID_CLOCK; |
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74 | |
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75 | the_timer = _Timer_Get( id, &location ); |
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76 | switch ( location ) { |
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77 | |
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78 | case OBJECTS_LOCAL: |
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79 | (void) _Watchdog_Remove( &the_timer->Ticker ); |
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80 | the_timer->the_class = TIMER_TIME_OF_DAY_ON_TASK; |
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81 | _Watchdog_Initialize( &the_timer->Ticker, routine, id, user_data ); |
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82 | the_timer->Ticker.initial = seconds - _TOD_Seconds_since_epoch(); |
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83 | |
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84 | (*timer_server->schedule_operation)( timer_server, the_timer ); |
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85 | |
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86 | _Thread_Enable_dispatch(); |
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87 | return RTEMS_SUCCESSFUL; |
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88 | |
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89 | #if defined(RTEMS_MULTIPROCESSING) |
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90 | case OBJECTS_REMOTE: /* should never return this */ |
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91 | #endif |
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92 | case OBJECTS_ERROR: |
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93 | break; |
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94 | } |
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95 | |
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96 | return RTEMS_INVALID_ID; |
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97 | } |
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