testSharedDummyBackendUnifiedExt.cpp

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// SPDX-FileCopyrightText: Deutsches Elektronen-Synchrotron DESY, MSK, ChimeraTK Project <chimeratk-support@desy.de>
// SPDX-License-Identifier: LGPL-3.0-or-later
 
#define BOOST_TEST_DYN_LINK
#define BOOST_TEST_MODULE SharedDummyBackendUnifiedTest
#include "Device.h"
#include "ProcessManagement.h"
#include "sharedDummyHelpers.h"
#include "Utilities.h"
 
#include <boost/filesystem.hpp>
#include <boost/interprocess/managed_shared_memory.hpp>
#include <boost/test/unit_test.hpp>
 
#include <unistd.h>
 
#include <string>
 
namespace {
 
  using namespace ChimeraTK;
  using namespace boost::unit_test_framework;
 
  // Static variables
  //  Use hardcoded information from sharedDummyUnified.dmap to only use public interface here.
  std::string mapFileName{"sharedDummyUnified.map"};
  std::size_t instanceIdHash = Utilities::shmDummyInstanceIdHash("1", {{"map", mapFileName}});
  std::string shmName{Utilities::createShmName(instanceIdHash, mapFileName, getUserName())};
 
  BOOST_AUTO_TEST_SUITE(SharedDummyBackendUnifiedTestSuite)
 
  struct TestFixture {
    TestFixture() : argc(framework::master_test_suite().argc), argv(framework::master_test_suite().argv) {}
 
    int argc;
    char** argv;
  };
 
  static void mirrorArea(
      ChimeraTK::OneDRegisterAccessor<int>& processVarsTo, ChimeraTK::OneDRegisterAccessor<int>& processVarsFrom) {
    processVarsFrom.read();
    for(size_t i = 0; i < processVarsFrom.getNElements(); ++i) {
      processVarsTo[i] = processVarsFrom[i];
    }
    processVarsTo.write();
  }
 
  /********************************************************************************************************************/
 
  BOOST_FIXTURE_TEST_CASE(testRegisterAccessor, TestFixture) {
    bool keepRunning = true;
 
    setDMapFilePath("sharedDummyUnified.dmap");
 
    {
      Device dev;
      BOOST_CHECK(!dev.isOpened());
      dev.open("SHDMEMDEV");
      BOOST_CHECK(dev.isOpened());
 
      BOOST_CHECK(shm_exists(shmName));
 
      ChimeraTK::OneDRegisterAccessor<int> processVarsFeature = dev.getOneDRegisterAccessor<int>("FEATURE/AREA1");
 
      ChimeraTK::OneDRegisterAccessor<int> processVarsMirror = dev.getOneDRegisterAccessor<int>("MIRRORED/AREA1");
 
      BOOST_CHECK_EQUAL(processVarsFeature.getNElements(), processVarsMirror.getNElements());
 
      ScalarRegisterAccessor<int> mirrorRequest_Type = dev.getScalarRegisterAccessor<int>("MIRRORREQUEST/TYPE");
      ScalarRegisterAccessor<int> mirrorRequest_Busy = dev.getScalarRegisterAccessor<int>("MIRRORREQUEST/BUSY");
      ScalarRegisterAccessor<int> mirrorRequest_Updated =
          dev.getScalarRegisterAccessor<int>("MIRRORREQUEST/UPDATED/DUMMY_WRITEABLE");
      ScalarRegisterAccessor<int> mirrorRequest_DataInterrupt =
          dev.getScalarRegisterAccessor<int>("MIRRORREQUEST/DATA_INTERRUPT");
      ScalarRegisterAccessor<int> mirrorRequestUpdated_Interrupt{
          dev.getScalarRegisterAccessor<int>("DUMMY_INTERRUPT_0")};
 
      ScalarRegisterAccessor<int> dataInterrupt{dev.getScalarRegisterAccessor<int>("DUMMY_INTERRUPT_1")};
 
      do {
        // poll Busy until it is set to true, indicating a new request
        do {
          mirrorRequest_Busy.readLatest();
          // we use boost::sleep because it defines an interruption point for signals
          boost::this_thread::sleep_for(boost::chrono::milliseconds(50));
        } while(mirrorRequest_Busy == 0);
 
        mirrorRequest_Type.readLatest();
        switch(static_cast<MirrorRequestType>((int)mirrorRequest_Type)) {
          case MirrorRequestType::from:
            mirrorArea(processVarsMirror, processVarsFeature);
            break;
          case MirrorRequestType::to:
            mirrorArea(processVarsFeature, processVarsMirror);
            break;
          case MirrorRequestType::stop:
            keepRunning = false;
        }
        mirrorRequest_Updated.readLatest();
        ++mirrorRequest_Updated;
        mirrorRequest_Updated.write();
        // also trigger interrupt for this variable
        mirrorRequestUpdated_Interrupt = 1;
        mirrorRequestUpdated_Interrupt.write();
 
        mirrorRequest_Busy = 0;
        mirrorRequest_Busy.write();
 
        mirrorRequest_DataInterrupt.readLatest();
        if(mirrorRequest_DataInterrupt == 1) {
          dataInterrupt.write();
          mirrorRequest_DataInterrupt = 0;
          mirrorRequest_DataInterrupt.write();
        }
      } while(keepRunning);
      dev.close();
    }
  }
 
  /********************************************************************************************************************/
  BOOST_AUTO_TEST_SUITE_END()
 
} // anonymous namespace