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) 1989-1999. |
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6 | * On-Line Applications Research Corporation (OAR). |
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7 | * |
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8 | * The license and distribution terms for this file may be |
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9 | * found in the file LICENSE in this distribution or at |
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10 | * http://www.OARcorp.com/rtems/license.html. |
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11 | * |
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12 | * $Id$ |
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13 | */ |
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14 | |
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15 | #include <rtems/system.h> |
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16 | #include <rtems/rtems/status.h> |
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17 | #include <rtems/rtems/asr.h> |
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18 | #include <rtems/score/isr.h> |
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19 | #include <rtems/rtems/modes.h> |
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20 | #include <rtems/rtems/signal.h> |
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21 | #include <rtems/score/thread.h> |
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22 | #include <rtems/rtems/tasks.h> |
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23 | |
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24 | /*PAGE |
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25 | * |
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26 | * rtems_signal_catch |
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27 | * |
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28 | * This directive allows a thread to specify what action to take when |
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29 | * catching signals. |
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30 | * |
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31 | * Input parameters: |
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32 | * handler - address of asynchronous signal routine (asr) |
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33 | * ( NULL indicates asr is invalid ) |
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34 | * mode_set - mode value for asr |
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35 | * |
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36 | * Output parameters: |
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37 | * RTEMS_SUCCESSFUL - always succeeds |
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38 | */ |
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39 | |
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40 | rtems_status_code rtems_signal_catch( |
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41 | rtems_asr_entry asr_handler, |
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42 | rtems_mode mode_set |
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43 | ) |
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44 | { |
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45 | Thread_Control *executing; |
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46 | RTEMS_API_Control *api; |
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47 | ASR_Information *asr; |
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48 | |
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49 | /* XXX normalize mode */ |
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50 | executing = _Thread_Executing; |
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51 | api = executing->API_Extensions[ THREAD_API_RTEMS ]; |
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52 | asr = &api->Signal; |
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53 | |
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54 | _Thread_Disable_dispatch(); /* cannot reschedule while */ |
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55 | /* the thread is inconsistent */ |
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56 | |
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57 | if ( !_ASR_Is_null_handler( asr_handler ) ) { |
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58 | asr->mode_set = mode_set; |
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59 | asr->handler = asr_handler; |
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60 | } |
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61 | else |
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62 | _ASR_Initialize( asr ); |
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63 | _Thread_Enable_dispatch(); |
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64 | return RTEMS_SUCCESSFUL; |
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65 | } |
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