1 | /* |
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2 | * Signal Manager |
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3 | * |
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4 | * |
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5 | * COPYRIGHT (c) 1989, 1990, 1991, 1992, 1993, 1994. |
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6 | * On-Line Applications Research Corporation (OAR). |
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7 | * All rights assigned to U.S. Government, 1994. |
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8 | * |
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9 | * This material may be reproduced by or for the U.S. Government pursuant |
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10 | * to the copyright license under the clause at DFARS 252.227-7013. This |
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11 | * notice must appear in all copies of this file and its derivatives. |
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12 | * |
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13 | * $Id$ |
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14 | */ |
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15 | |
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16 | #include <rtems/system.h> |
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17 | #include <rtems/asr.h> |
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18 | #include <rtems/isr.h> |
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19 | #include <rtems/modes.h> |
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20 | #include <rtems/signal.h> |
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21 | #include <rtems/thread.h> |
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22 | |
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23 | /*PAGE |
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24 | * |
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25 | * rtems_signal_catch |
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26 | * |
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27 | * This directive allows a thread to specify what action to take when |
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28 | * catching signals. |
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29 | * |
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30 | * Input parameters: |
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31 | * handler - address of asynchronous signal routine (asr) |
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32 | * ( NULL indicates asr is invalid ) |
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33 | * mode_set - mode value for asr |
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34 | * |
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35 | * Output parameters: |
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36 | * RTEMS_SUCCESSFUL - always succeeds |
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37 | */ |
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38 | |
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39 | rtems_status_code rtems_signal_catch( |
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40 | rtems_asr_entry handler, |
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41 | rtems_mode mode_set |
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42 | ) |
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43 | { |
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44 | Thread_Control *executing; |
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45 | |
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46 | executing = _Thread_Executing; |
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47 | _Thread_Disable_dispatch(); /* cannot reschedule while */ |
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48 | /* the thread is inconsistent */ |
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49 | |
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50 | if ( ! _ASR_Is_null_handler( handler ) ) { |
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51 | executing->Signal.mode_set = mode_set; |
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52 | executing->Signal.handler = handler; |
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53 | } |
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54 | else |
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55 | _ASR_Initialize( &executing->Signal ); |
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56 | _Thread_Enable_dispatch(); |
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57 | return( RTEMS_SUCCESSFUL ); |
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58 | } |
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59 | |
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60 | /*PAGE |
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61 | * |
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62 | * rtems_signal_send |
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63 | * |
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64 | * This directive allows a thread to send signals to a thread. |
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65 | * |
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66 | * Input parameters: |
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67 | * id - thread id |
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68 | * signal_set - signal set |
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69 | * |
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70 | * Output parameters: |
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71 | * RTEMS_SUCCESSFUL - if successful |
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72 | * error code - if unsuccessful |
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73 | */ |
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74 | |
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75 | rtems_status_code rtems_signal_send( |
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76 | Objects_Id id, |
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77 | rtems_signal_set signal_set |
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78 | ) |
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79 | { |
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80 | register Thread_Control *the_thread; |
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81 | Objects_Locations location; |
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82 | |
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83 | the_thread = _Thread_Get( id, &location ); |
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84 | switch ( location ) { |
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85 | case OBJECTS_ERROR: |
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86 | return( RTEMS_INVALID_ID ); |
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87 | case OBJECTS_REMOTE: |
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88 | return _Signal_MP_Send_request_packet( |
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89 | SIGNAL_MP_SEND_REQUEST, |
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90 | id, |
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91 | signal_set |
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92 | ); |
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93 | case OBJECTS_LOCAL: |
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94 | if ( ! _ASR_Is_null_handler( the_thread->Signal.handler ) ) { |
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95 | if ( _Modes_Is_asr_disabled( the_thread->current_modes ) ) |
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96 | _ASR_Post_signals( signal_set, &the_thread->Signal.signals_pending ); |
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97 | else { |
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98 | _ASR_Post_signals( signal_set, &the_thread->Signal.signals_posted ); |
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99 | if ( _ISR_Is_in_progress() && _Thread_Is_executing( the_thread ) ) |
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100 | _ISR_Signals_to_thread_executing = TRUE; |
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101 | } |
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102 | _Thread_Enable_dispatch(); |
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103 | return( RTEMS_SUCCESSFUL ); |
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104 | } |
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105 | _Thread_Enable_dispatch(); |
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106 | return( RTEMS_NOT_DEFINED ); |
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107 | } |
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108 | |
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109 | return( RTEMS_INTERNAL_ERROR ); /* unreached - only to remove warnings */ |
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110 | } |
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