1 | /* |
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2 | * _POSIX_Timer_TSR |
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3 | * |
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4 | * COPYRIGHT (c) 1989-2007. |
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5 | * On-Line Applications Research Corporation (OAR). |
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6 | * |
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7 | * The license and distribution terms for this file may be |
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8 | * found in the file LICENSE in this distribution or at |
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9 | * http://www.rtems.com/license/LICENSE. |
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10 | * |
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11 | * $Id$ |
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12 | */ |
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13 | |
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14 | #if HAVE_CONFIG_H |
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15 | #include "config.h" |
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16 | #endif |
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17 | |
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18 | #include <time.h> |
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19 | #include <pthread.h> |
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20 | #include <signal.h> |
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21 | |
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22 | #include <rtems/system.h> |
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23 | #include <rtems/seterr.h> |
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24 | #include <rtems/score/thread.h> |
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25 | #include <rtems/score/tod.h> |
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26 | #include <rtems/posix/time.h> |
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27 | #include <rtems/posix/ptimer.h> |
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28 | #include <rtems/posix/timer.h> |
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29 | |
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30 | /* |
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31 | * This is the operation that is run when a timer expires |
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32 | */ |
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33 | void _POSIX_Timer_TSR(Objects_Id timer, void *data) |
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34 | { |
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35 | POSIX_Timer_Control *ptimer; |
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36 | bool activated; |
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37 | |
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38 | ptimer = (POSIX_Timer_Control *)data; |
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39 | |
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40 | /* Increment the number of expirations. */ |
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41 | ptimer->overrun = ptimer->overrun + 1; |
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42 | |
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43 | /* The timer must be reprogrammed */ |
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44 | if ( ( ptimer->timer_data.it_interval.tv_sec != 0 ) || |
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45 | ( ptimer->timer_data.it_interval.tv_nsec != 0 ) ) { |
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46 | activated = _POSIX_Timer_Insert_helper( |
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47 | &ptimer->Timer, |
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48 | ptimer->ticks, |
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49 | ptimer->Object.id, |
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50 | _POSIX_Timer_TSR, |
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51 | ptimer |
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52 | ); |
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53 | if ( !activated ) |
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54 | return; |
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55 | |
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56 | /* Store the time when the timer was started again */ |
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57 | _TOD_Get( &ptimer->time ); |
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58 | |
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59 | /* The state really did not change but just to be safe */ |
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60 | ptimer->state = POSIX_TIMER_STATE_CREATE_RUN; |
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61 | } else { |
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62 | /* Indicates that the timer is stopped */ |
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63 | ptimer->state = POSIX_TIMER_STATE_CREATE_STOP; |
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64 | } |
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65 | |
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66 | /* |
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67 | * The sending of the signal to the process running the handling function |
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68 | * specified for that signal is simulated |
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69 | */ |
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70 | |
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71 | if ( pthread_kill ( ptimer->thread_id, ptimer->inf.sigev_signo ) ) { |
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72 | /* XXX error handling */ |
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73 | } |
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74 | |
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75 | /* After the signal handler returns, the count of expirations of the |
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76 | * timer must be set to 0. |
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77 | */ |
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78 | ptimer->overrun = 0; |
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79 | } |
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