epicsboolean.cpp

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#include "epicsboolean.h"

#include <stdio.h>

EpicsBoolean::EpicsBoolean(QString pvName, QObject *parent, int debug)
  : EpicsObject(pvName, parent, debug),
    m_Value(0)
{
}

EpicsBoolean::~EpicsBoolean()
{
}

void EpicsBoolean::set()
{
  caput(true);
}

void EpicsBoolean::clear()
{
  caput(false);
}

void EpicsBoolean::event_handler(struct event_handler_args args)
{
  union db_access_val *pb = (union db_access_val *) args.dbr;

  bool res=0;

  switch (args.type) {
  case DBR_SHORT:
    res = pb->shrtval;
    break;
  case DBR_LONG:
    res = pb->longval;
    break;
  case DBR_FLOAT:
    res = pb->fltval;
    break;
  case DBR_ENUM:
    res = pb->enmval;
    break;
  case DBR_CHAR:
    res = pb->charval;
    break;
  case DBR_DOUBLE:
    res = pb->doubleval;
    break;
  default:
    printf("data type %ld not supported\n", args.type);
  }

//   printf("%s Epics Boolean Event Handler called %ld = %d\n", ca_name(args.chid), args.type, res);

  ((EpicsBoolean*) args.usr) -> changeValue(res);
}

caEventCallBackFunc *EpicsBoolean::get_event_handler()
{
  return &EpicsBoolean::event_handler;
}

void EpicsBoolean::changeValue(bool newval)
{
//   printf("ca_put(%d,%p,%g)\n", DBR_INT, channelID(), newval);

//  ca_put(DBR_INT, channelID(), &newval);

  QMutexLocker lock(&m_Mutex);

  if (m_Value != newval) {

    m_Value = newval;
    emit valueChanged(m_Value);
  }
}

void EpicsBoolean::caput(bool val)
{
  int nval = val;

  ca_put(DBR_INT, channelID(), &nval);
  ca_pend_io(0.5);
}

bool EpicsBoolean::value()
{
  QMutexLocker lock(&m_Mutex);

  return m_Value;
}