1 | /** |
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2 | * @file |
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3 | * |
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4 | * @ingroup RTEMSImplClassicSignal |
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5 | * |
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6 | * @brief This source file contains the implementation of |
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7 | * rtems_signal_send(). |
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8 | */ |
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9 | |
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10 | /* |
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11 | * COPYRIGHT (c) 1989-2014. |
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12 | * On-Line Applications Research Corporation (OAR). |
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13 | * |
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14 | * The license and distribution terms for this file may be |
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15 | * found in the file LICENSE in this distribution or at |
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16 | * http://www.rtems.org/license/LICENSE. |
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17 | */ |
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18 | |
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19 | #ifdef HAVE_CONFIG_H |
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20 | #include "config.h" |
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21 | #endif |
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22 | |
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23 | #include <rtems/rtems/signalimpl.h> |
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24 | #include <rtems/rtems/asrimpl.h> |
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25 | #include <rtems/rtems/tasksdata.h> |
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26 | #include <rtems/score/threaddispatch.h> |
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27 | #include <rtems/score/threadimpl.h> |
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28 | |
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29 | rtems_status_code rtems_signal_send( |
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30 | rtems_id id, |
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31 | rtems_signal_set signal_set |
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32 | ) |
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33 | { |
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34 | Thread_Control *the_thread; |
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35 | ISR_lock_Context lock_context; |
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36 | RTEMS_API_Control *api; |
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37 | ASR_Information *asr; |
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38 | |
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39 | if ( signal_set == 0 ) { |
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40 | return RTEMS_INVALID_NUMBER; |
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41 | } |
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42 | |
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43 | the_thread = _Thread_Get( id, &lock_context ); |
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44 | |
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45 | if ( the_thread == NULL ) { |
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46 | #if defined(RTEMS_MULTIPROCESSING) |
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47 | return _Signal_MP_Send( id, signal_set ); |
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48 | #else |
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49 | return RTEMS_INVALID_ID; |
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50 | #endif |
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51 | } |
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52 | |
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53 | api = the_thread->API_Extensions[ THREAD_API_RTEMS ]; |
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54 | asr = &api->Signal; |
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55 | |
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56 | _Thread_State_acquire_critical( the_thread, &lock_context ); |
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57 | |
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58 | if ( asr->handler == NULL ) { |
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59 | _Thread_State_release( the_thread, &lock_context ); |
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60 | return RTEMS_NOT_DEFINED; |
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61 | } |
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62 | |
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63 | if ( asr->is_enabled ) { |
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64 | Per_CPU_Control *cpu_self; |
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65 | |
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66 | _ASR_Post_signals( signal_set, &asr->signals_posted ); |
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67 | _Thread_Add_post_switch_action( |
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68 | the_thread, |
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69 | &api->Signal_action, |
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70 | _Signal_Action_handler |
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71 | ); |
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72 | cpu_self = _Thread_Dispatch_disable_critical( &lock_context ); |
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73 | _Thread_State_release( the_thread, &lock_context ); |
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74 | _Thread_Dispatch_enable( cpu_self ); |
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75 | } else { |
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76 | _ASR_Post_signals( signal_set, &asr->signals_pending ); |
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77 | _Thread_State_release( the_thread, &lock_context ); |
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78 | } |
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79 | |
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80 | return RTEMS_SUCCESSFUL; |
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81 | } |
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