1 | /** |
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2 | * @file |
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3 | * |
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4 | * @brief RTEMS Catch Signal |
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5 | * @ingroup ClassicSignal |
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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/sysinit.h> |
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22 | #include <rtems/rtems/signalimpl.h> |
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23 | #include <rtems/rtems/asrimpl.h> |
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24 | #include <rtems/rtems/tasks.h> |
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25 | #include <rtems/score/threadimpl.h> |
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26 | |
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27 | void _Signal_Action_handler( |
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28 | Thread_Control *executing, |
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29 | Thread_Action *action, |
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30 | Per_CPU_Control *cpu, |
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31 | ISR_Level level |
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32 | ) |
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33 | { |
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34 | RTEMS_API_Control *api; |
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35 | ASR_Information *asr; |
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36 | rtems_signal_set signal_set; |
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37 | Modes_Control prev_mode; |
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38 | |
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39 | (void) action; |
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40 | _Thread_Action_release_and_ISR_enable( cpu, level ); |
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41 | |
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42 | api = executing->API_Extensions[ THREAD_API_RTEMS ]; |
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43 | if ( !api ) |
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44 | return; |
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45 | |
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46 | /* |
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47 | * Signal Processing |
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48 | */ |
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49 | |
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50 | asr = &api->Signal; |
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51 | signal_set = _ASR_Get_posted_signals( asr ); |
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52 | |
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53 | if ( signal_set == 0 ) { |
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54 | return; |
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55 | } |
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56 | |
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57 | asr->nest_level += 1; |
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58 | rtems_task_mode( asr->mode_set, RTEMS_ALL_MODE_MASKS, &prev_mode ); |
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59 | |
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60 | (*asr->handler)( signal_set ); |
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61 | |
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62 | asr->nest_level -= 1; |
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63 | rtems_task_mode( prev_mode, RTEMS_ALL_MODE_MASKS, &prev_mode ); |
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64 | } |
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65 | |
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66 | rtems_status_code rtems_signal_catch( |
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67 | rtems_asr_entry asr_handler, |
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68 | rtems_mode mode_set |
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69 | ) |
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70 | { |
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71 | Thread_Control *executing; |
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72 | RTEMS_API_Control *api; |
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73 | ASR_Information *asr; |
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74 | ISR_lock_Context lock_context; |
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75 | |
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76 | _ISR_lock_ISR_disable( &lock_context ); |
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77 | executing = _Thread_Executing; |
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78 | api = executing->API_Extensions[ THREAD_API_RTEMS ]; |
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79 | asr = &api->Signal; |
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80 | |
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81 | _ASR_Acquire_critical( asr, &lock_context ); |
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82 | |
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83 | if ( !_ASR_Is_null_handler( asr_handler ) ) { |
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84 | asr->mode_set = mode_set; |
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85 | asr->handler = asr_handler; |
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86 | } else { |
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87 | _ASR_Initialize( asr ); |
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88 | } |
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89 | |
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90 | _ASR_Release( asr, &lock_context ); |
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91 | return RTEMS_SUCCESSFUL; |
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92 | } |
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93 | |
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94 | #if defined(RTEMS_MULTIPROCESSING) |
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95 | static void _Signal_Manager_initialization( void ) |
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96 | { |
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97 | _MPCI_Register_packet_processor( |
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98 | MP_PACKET_SIGNAL, |
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99 | _Signal_MP_Process_packet |
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100 | ); |
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101 | } |
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102 | |
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103 | RTEMS_SYSINIT_ITEM( |
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104 | _Signal_Manager_initialization, |
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105 | RTEMS_SYSINIT_CLASSIC_SIGNAL, |
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106 | RTEMS_SYSINIT_ORDER_MIDDLE |
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107 | ); |
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108 | #endif |
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