1

#include <stdio.h>

     2

#include <string.h>

     3

#include <time.h>

     4

#include <signal.h>

     5

#include <stdlib.h>

     6

#include <pthread.h> 

     7

     8

long AtomicCompareExchange(long* atomicvar,long exchange, long compared)

     9

{

    10

    return __sync_val_compare_and_swap(atomicvar, compared, exchange);

    11

}

    12

    13

//long AtomicExchange(long* atomicvar,long exchange)

    14

//{

    15

//    return __sync_lock_test_and_set(atomicvar, exchange);

    16

//}

    17

    18

void PLC_GetTime(IEC_TIME *CURRENT_TIME)

    19

{

    20

    clock_gettime(CLOCK_REALTIME, CURRENT_TIME);

    21

}

    22

    23

void PLC_timer_notify(sigval_t val)

    24

{

    25

    PLC_GetTime(&__CURRENT_TIME);

    26

    __run();

    27

}

    28

    29

timer_t PLC_timer;

    30

    31

void PLC_SetTimer(long long next, long long period)

    32

{

    33

    struct itimerspec timerValues;

    34

	/*

    35

	printf("SetTimer(%lld,%lld)\n",next, period);

    36

	*/

    37

    memset (&timerValues, 0, sizeof (struct itimerspec));

    38

	{

    39

#ifdef __lldiv_t_defined

    40

		lldiv_t nxt_div = lldiv(next, 1000000000);

    41

		lldiv_t period_div = lldiv(period, 1000000000);

    42

	    timerValues.it_value.tv_sec = nxt_div.quot;

    43

	    timerValues.it_value.tv_nsec = nxt_div.rem;

    44

	    timerValues.it_interval.tv_sec = period_div.quot;

    45

	    timerValues.it_interval.tv_nsec = period_div.rem;

    46

#else

    47

	    timerValues.it_value.tv_sec = next / 1000000000;

    48

	    timerValues.it_value.tv_nsec = next % 1000000000;

    49

	    timerValues.it_interval.tv_sec = period / 1000000000;

    50

	    timerValues.it_interval.tv_nsec = period % 1000000000;

    51

#endif

    52

	}	

    53

    timer_settime (PLC_timer, 0, &timerValues, NULL);

    54

}

    55

//

    56

void catch_signal(int sig)

    57

{

    58

//  signal(SIGTERM, catch_signal);

    59

  signal(SIGINT, catch_signal);

    60

  printf("Got Signal %d\n",sig);

    61

  exit(0);

    62

}

    63

    64

int startPLC(int argc,char **argv)

    65

{

    66

    struct sigevent sigev;

    67

    /* Translate PLC's microseconds to Ttick nanoseconds */

    68

    Ttick = 1000000 * maxval(common_ticktime__,1);

    69

    70

    memset (&sigev, 0, sizeof (struct sigevent));

    71

    sigev.sigev_value.sival_int = 0;

    72

    sigev.sigev_notify = SIGEV_THREAD;

    73

    sigev.sigev_notify_attributes = NULL;

    74

    sigev.sigev_notify_function = PLC_timer_notify;

    75

    76

    timer_create (CLOCK_REALTIME, &sigev, &PLC_timer);

    77

    if(  __init(argc,argv) == 0 ){

    78

        PLC_SetTimer(Ttick,Ttick);

    79

    80

        /* install signal handler for manual break */

    81

//        signal(SIGTERM, catch_signal);

    82

        signal(SIGINT, catch_signal);

    83

    }else{

    84

        return 1;

    85

    }

    86

    return 0;

    87

}

    88

   103

int stopPLC()

   104

{

   105

    /* Stop the PLC */

   106

    PLC_SetTimer(0,0);

   107

    timer_delete (PLC_timer);

   108

    __cleanup();

   110

}

   111

   112

extern int __tick;

   113

/* from plc_debugger.c */

   114

int WaitDebugData()

   115

{

   116

    /* Wait signal from PLC thread */

   120

    return __debug_tick;

   121

}

   122

   123

/* Called by PLC thread when debug_publish finished

   124

 * This is supposed to unlock debugger thread in WaitDebugData*/

   125

void InitiateDebugTransfer()

   126

{

   127

    /* signal debugger thread to continue*/

   128

    __debug_tick = __tick;

   132

}