DQMHistOutputToEPICS.cc

//+
// File : DQMHistOutputToEPICS.cc
// Description : Write Histogram Content to EPICS Arrays
//
// Author : Bjoern Spruck, University Mainz
// Date : 2019
//-
 
 
#include <dqm/analysis/modules/DQMHistOutputToEPICS.h>
 
using namespace std;
using namespace Belle2;
 
//-----------------------------------------------------------------
//                 Register the Module
//-----------------------------------------------------------------
REG_MODULE(DQMHistOutputToEPICS)
 
//-----------------------------------------------------------------
//                 Implementation
//-----------------------------------------------------------------
 
DQMHistOutputToEPICSModule::DQMHistOutputToEPICSModule()
  : DQMHistAnalysisModule()
{
  // This module CAN NOT be run in parallel!
 
  //Parameter definition
  addParam("HistoList", m_histlist, "histname, pvname");
  B2DEBUG(99, "DQMHistOutputToEPICS: Constructor done.");
}
 
DQMHistOutputToEPICSModule::~DQMHistOutputToEPICSModule()
{
#ifdef _BELLE2_EPICS
  if (ca_current_context()) ca_context_destroy();
#endif
}
 
void DQMHistOutputToEPICSModule::initialize()
{
#ifdef _BELLE2_EPICS
  if (!ca_current_context()) SEVCHK(ca_context_create(ca_disable_preemptive_callback), "ca_context_create");
#endif
  for (auto& it : m_histlist) {
    if (it.size() < 2) {
      B2WARNING("Histolist with wrong nr of parameters " << it.size());
      continue;
    }
#ifdef _BELLE2_EPICS
    auto n = new MYNODE;
    n->histoname = it.at(0);
    SEVCHK(ca_create_channel(it.at(1).c_str(), NULL, NULL, 10, &n->mychid), "ca_create_channel failure");
    if (it.size() >= 3) {
      SEVCHK(ca_create_channel(it.at(2).c_str(), NULL, NULL, 10, &n->mychid_last), "ca_create_channel failure");
    } else {
      n->mychid_last = 0;
    }
    pmynode.push_back(n);
#endif
  }
 
#ifdef _BELLE2_EPICS
  SEVCHK(ca_pend_io(5.0), "ca_pend_io failure");
#endif
  B2DEBUG(99, "DQMHistOutputToEPICS: initialized.");
}
 
void DQMHistOutputToEPICSModule::cleanPVs(void)
{
#ifdef _BELLE2_EPICS
  for (auto* it : pmynode) {
    if (!it->mychid) continue;
    int length = int(ca_element_count(it->mychid));
    if (length > 0) {
      it->data.resize(length, 0.0);
      SEVCHK(ca_array_put(DBR_DOUBLE, length, it->mychid, (void*)(it->data.data())), "ca_put failure");
      if (it->mychid_last) {
        if (length == int(ca_element_count(it->mychid_last))) {
          SEVCHK(ca_array_put(DBR_DOUBLE, length, it->mychid_last, (void*)(it->data.data())), "ca_put failure");
        }
      }
    }
  }
#endif
}
 
void DQMHistOutputToEPICSModule::beginRun()
{
  B2DEBUG(99, "DQMHistOutputToEPICS: beginRun called.");
  cleanPVs();
  m_dirty = true;
}
 
void DQMHistOutputToEPICSModule::event()
{
#ifdef _BELLE2_EPICS
  for (auto& it : pmynode) {
    if (!it->mychid) continue;
    int length = it->data.size();
    TH1* hh1 = findHist(it->histoname);
    if (hh1 && hh1->GetNcells() > 2 && length > 0  && length == int(ca_element_count(it->mychid))) {
      // If bin count doesnt match, we loose bins but otherwise ca_array_put will complain
      // We fill up the array with ZEROs otherwise
      if (hh1->GetDimension() == 1) {
        int i = 0;
        int nx = hh1->GetNbinsX() + 1;
        for (int x = 1; x < nx && i < length ; x++) {
          it->data[i++] = hh1->GetBinContent(x);
        }
 
      } else if (hh1->GetDimension() == 2) {
        int i = 0;
        int nx = hh1->GetNbinsX() + 1;
        int ny = hh1->GetNbinsY() + 1;
        for (int y = 1; y < ny && i < length; y++) {
          for (int x = 1; x < nx && i < length ; x++) {
            it->data[i++] = hh1->GetBinContent(x, y);
          }
        }
      }
 
      SEVCHK(ca_array_put(DBR_DOUBLE, length, it->mychid, (void*)it->data.data()), "ca_set failure");
    }
  }
  SEVCHK(ca_pend_io(5.0), "ca_pend_io failure");
#endif
}
 
void DQMHistOutputToEPICSModule::copyToLast(void)
{
  if (!m_dirty) return;
#ifdef _BELLE2_EPICS
  for (auto* it : pmynode) {
    if (it->mychid && it->mychid_last) {
      // copy PVs to last-run-PV if existing
      int length = it->data.size();
      if (length > 0 && length == int(ca_element_count(it->mychid_last))) {
        SEVCHK(ca_array_put(DBR_DOUBLE, length, it->mychid_last, (void*)it->data.data()), "ca_put failure");
      }
    }
  }
  SEVCHK(ca_pend_io(5.0), "ca_pend_io failure");
#endif
 
  m_dirty = false;
}
 
void DQMHistOutputToEPICSModule::endRun()
{
  B2DEBUG(99, "DQMHistOutputToEPICS: endRun called");
  copyToLast();
}
 
void DQMHistOutputToEPICSModule::terminate()
{
  B2DEBUG(99, "DQMHistOutputToEPICS: terminate called");
  copyToLast();
  // the following belongs to terminate
#ifdef _BELLE2_EPICS
  for (auto* it : pmynode) {
    if (it->mychid) SEVCHK(ca_clear_channel(it->mychid), "ca_clear_channel failure");
    if (it->mychid_last) SEVCHK(ca_clear_channel(it->mychid_last), "ca_clear_channel failure");
  }
  SEVCHK(ca_pend_io(5.0), "ca_pend_io failure");
#endif
}