1 | /** |
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2 | * @file |
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3 | * |
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4 | * @brief Remove Watchdog from List |
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5 | * @ingroup ScoreWatchdog |
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6 | */ |
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7 | |
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8 | /* |
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9 | * COPYRIGHT (c) 1989-1999. |
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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.org/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/score/watchdogimpl.h> |
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22 | #include <rtems/score/assert.h> |
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23 | |
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24 | void _Watchdog_Remove_it( |
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25 | Watchdog_Header *header, |
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26 | Watchdog_Control *the_watchdog |
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27 | ) |
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28 | { |
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29 | Chain_Node *next; |
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30 | Watchdog_Interval delta; |
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31 | const Chain_Node *iterator_tail; |
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32 | Chain_Node *iterator_node; |
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33 | |
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34 | _Assert( |
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35 | the_watchdog->state == WATCHDOG_ACTIVE |
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36 | || the_watchdog->state == WATCHDOG_REMOVE_IT |
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37 | ); |
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38 | |
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39 | the_watchdog->state = WATCHDOG_INACTIVE; |
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40 | the_watchdog->stop_time = _Watchdog_Ticks_since_boot; |
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41 | |
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42 | next = _Chain_Next( &the_watchdog->Node ); |
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43 | delta = the_watchdog->delta_interval; |
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44 | |
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45 | if ( next != _Chain_Tail( &header->Watchdogs ) ) { |
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46 | Watchdog_Control *next_watchdog; |
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47 | |
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48 | next_watchdog = (Watchdog_Control *) next; |
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49 | next_watchdog->delta_interval += delta; |
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50 | } |
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51 | |
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52 | _Chain_Extract_unprotected( &the_watchdog->Node ); |
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53 | |
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54 | iterator_node = _Chain_First( &header->Iterators ); |
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55 | iterator_tail = _Chain_Immutable_tail( &header->Iterators ); |
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56 | |
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57 | while ( iterator_node != iterator_tail ) { |
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58 | Watchdog_Iterator *iterator; |
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59 | |
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60 | iterator = (Watchdog_Iterator *) iterator_node; |
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61 | |
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62 | if ( iterator->current == next ) { |
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63 | iterator->delta_interval += delta; |
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64 | } |
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65 | |
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66 | if ( iterator->current == &the_watchdog->Node ) { |
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67 | iterator->current = _Chain_Previous( &the_watchdog->Node ); |
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68 | } |
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69 | |
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70 | iterator_node = _Chain_Next( iterator_node ); |
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71 | } |
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72 | } |
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73 | |
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74 | Watchdog_States _Watchdog_Remove( |
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75 | Watchdog_Header *header, |
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76 | Watchdog_Control *the_watchdog |
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77 | ) |
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78 | { |
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79 | ISR_lock_Context lock_context; |
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80 | Watchdog_States previous_state; |
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81 | Watchdog_Interval now; |
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82 | |
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83 | _Watchdog_Acquire( header, &lock_context ); |
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84 | previous_state = the_watchdog->state; |
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85 | switch ( previous_state ) { |
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86 | case WATCHDOG_INACTIVE: |
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87 | break; |
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88 | |
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89 | case WATCHDOG_BEING_INSERTED: |
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90 | |
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91 | /* |
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92 | * It is not actually on the chain so just change the state and |
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93 | * the Insert operation we interrupted will be aborted. |
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94 | */ |
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95 | the_watchdog->state = WATCHDOG_INACTIVE; |
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96 | now = _Watchdog_Ticks_since_boot; |
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97 | the_watchdog->start_time = now; |
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98 | the_watchdog->stop_time = now; |
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99 | break; |
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100 | |
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101 | case WATCHDOG_ACTIVE: |
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102 | case WATCHDOG_REMOVE_IT: |
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103 | _Watchdog_Remove_it( header, the_watchdog ); |
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104 | break; |
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105 | } |
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106 | |
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107 | _Watchdog_Release( header, &lock_context ); |
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108 | return( previous_state ); |
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109 | } |
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