testSharedDummyBackendExt.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 SharedDummyBackendTest
#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 <algorithm>
#include <chrono>
#include <csignal>
#include <cstdlib>
#include <string>
#include <thread>
#include <unistd.h>
#include <utility>
#include <vector>
 
namespace {
 
  using namespace ChimeraTK;
  using namespace boost::unit_test_framework;
 
  // Static function prototypes
  static void interrupt_handler(int);
 
  // Static variables
  //  Use hardcoded information from the dmap-file to
  //  only use public interface here
  static std::string instanceId{"1"};
  static std::string mapFileName{"shareddummy.map"};
 
  static bool terminationCaught = false;
 
  BOOST_AUTO_TEST_SUITE(SharedDummyBackendTestSuite)
 
  struct TestFixture {
    TestFixture() : argc(framework::master_test_suite().argc), argv(framework::master_test_suite().argv) {}
 
    int argc;
    char** argv;
  };
 
  /********************************************************************************************************************/
 
  BOOST_FIXTURE_TEST_CASE(testRobustnessMain, TestFixture) {
    unsigned nIterations = 0;
    if(argc != 2) {
      std::cout << "Illegal number of arguments. Test case must be called with "
                   "the number of read/write cycles!"
                << std::endl;
    }
    else {
      nIterations = atoi(argv[1]);
    }
 
    setDMapFilePath("shareddummyTest.dmap");
 
    bool readbackCorrect = false;
    bool waitingForResponse = true;
    const unsigned maxIncorrectIterations = 20; /* Timeout while waiting for 2nd application */
    unsigned iterations = 0;
    unsigned incorrectIterations = 0;
 
    Device dev;
    BOOST_CHECK(!dev.isOpened());
    dev.open("SHDMEMDEV");
    BOOST_CHECK(dev.isOpened());
 
    ChimeraTK::OneDRegisterAccessor<int> processVarsWrite = dev.getOneDRegisterAccessor<int>("FEATURE2/AREA1");
    std::vector<int> processVarsOld(processVarsWrite.getNElements(), 0);
 
    do {
      // Write some values to the shared memory
      for(size_t i = 0; i < processVarsWrite.getNElements(); ++i) {
        processVarsWrite[i] = i + iterations;
      }
      processVarsWrite.write();
 
      // Check if values have been written back by the other application
      ChimeraTK::OneDRegisterAccessor<int> processVarsRead = dev.getOneDRegisterAccessor<int>("FEATURE2/AREA2");
      // Read as long as the readback from last iteration has been overwritten
      do {
        processVarsRead.read();
      } while((std::vector<int>)processVarsRead == (std::vector<int>)processVarsOld && !waitingForResponse);
 
      if((std::vector<int>)processVarsWrite == (std::vector<int>)processVarsRead) {
        if(waitingForResponse) {
          waitingForResponse = false;
        }
        readbackCorrect = true;
      }
      else {
        readbackCorrect = false;
        if(!waitingForResponse) {
          std::cout << "Corrupted data detected:" << std::endl;
          for(const auto pvr : processVarsRead) {
            std::cout << "    " << pvr << std::endl;
          }
        }
      }
 
      if(waitingForResponse) {
        incorrectIterations++;
      }
      else {
        iterations++;
      }
      processVarsOld = processVarsWrite;
    } while((readbackCorrect || waitingForResponse) && incorrectIterations != maxIncorrectIterations &&
        iterations != nIterations);
 
    BOOST_CHECK(readbackCorrect);
    std::cout << "Finished test after " << iterations << " of " << nIterations << " Iterations." << std::endl;
    if(incorrectIterations == maxIncorrectIterations) {
      std::cout << "Test cancelled because echoing process did not respond!" << std::endl;
    }
 
    dev.close();
  }
 
  BOOST_FIXTURE_TEST_CASE(testReadWrite, TestFixture) {
    signal(SIGINT, interrupt_handler);
 
    bool keepRunning = false;
 
    if(argc >= 2 && !strcmp(argv[1], "KEEP_RUNNING")) {
      keepRunning = true;
    }
 
    setDMapFilePath("shareddummyTest.dmap");
 
    boost::filesystem::path absPathToMapFile = boost::filesystem::absolute(mapFileName);
 
    std::string shmName{createExpectedShmName(instanceId, absPathToMapFile.string(), getUserName())};
 
    {
      Device dev;
      BOOST_CHECK(!dev.isOpened());
      dev.open("SHDMEMDEV");
      BOOST_CHECK(dev.isOpened());
 
      BOOST_CHECK(shm_exists(shmName));
 
      do {
        ChimeraTK::OneDRegisterAccessor<int> processVarsRead = dev.getOneDRegisterAccessor<int>("FEATURE2/AREA1");
        processVarsRead.read();
 
        ChimeraTK::OneDRegisterAccessor<int> processVarsWrite = dev.getOneDRegisterAccessor<int>("FEATURE2/AREA2");
 
        for(size_t i = 0; i < processVarsRead.getNElements(); ++i) {
          processVarsWrite[i] = processVarsRead[i];
        }
        processVarsWrite.write();
      } while(keepRunning && !terminationCaught);
      dev.close();
    }
  }
 
  BOOST_AUTO_TEST_CASE(testWriteToReadOnly) {
    setDMapFilePath("shareddummyTest.dmap");
    Device dev;
    dev.open("SHDMEMDEV");
 
    ScalarRegisterAccessor<int> roRegisterOne_dw{
        dev.getScalarRegisterAccessor<int>("WORD_READ_ONLY_1.DUMMY_WRITEABLE")};
    ScalarRegisterAccessor<int> roRegisterTwo{dev.getScalarRegisterAccessor<int>("WORD_READ_ONLY_2")};
 
    BOOST_CHECK(!roRegisterOne_dw.isReadOnly());
    BOOST_CHECK(roRegisterOne_dw.isWriteable());
    BOOST_CHECK(roRegisterTwo.isReadOnly());
    BOOST_CHECK(!roRegisterTwo.isWriteable());
 
    BOOST_CHECK_THROW(roRegisterTwo.write(), ChimeraTK::logic_error);
 
    // Mirror to the other register
    roRegisterTwo.read();
    const int roRegisterTwoValue = roRegisterTwo;
    roRegisterOne_dw = roRegisterTwoValue;
    roRegisterOne_dw.write();
 
    // Check happens in the automativ test case.
 
    dev.close();
  }
 
  BOOST_AUTO_TEST_CASE(testMakeMess) {
    setDMapFilePath("shareddummyTest.dmap");
 
    Device dev;
    dev.open("SHDMEMDEV");
 
    ChimeraTK::OneDRegisterAccessor<int> processVars = dev.getOneDRegisterAccessor<int>("FEATURE2/AREA1");
 
    int n = 0;
    std::generate(processVars.begin(), processVars.end(), [n]() mutable { return n++; });
    processVars.write();
 
    // Wait to be killed or timeout...
    std::this_thread::sleep_until(std::chrono::system_clock::now() + std::chrono::seconds(20));
 
    dev.close();
  }
 
  BOOST_AUTO_TEST_CASE(testVerifyCleanup) {
    setDMapFilePath("shareddummyTest.dmap");
 
    Device dev;
    dev.open("SHDMEMDEV");
 
    ChimeraTK::OneDRegisterAccessor<int> processVars = dev.getOneDRegisterAccessor<int>("FEATURE2/AREA1");
    processVars.read();
 
    // Check if content is all zero
    BOOST_CHECK(std::all_of(processVars.begin(), processVars.end(), [](int i) { return i == 0; }));
 
    dev.close();
  }
 
  BOOST_AUTO_TEST_CASE(testVerifyMemoryDeleted) {
    setDMapFilePath("shareddummyTest.dmap");
 
    boost::filesystem::path absPathToMapFile = boost::filesystem::absolute(mapFileName);
 
    std::string shmName{createExpectedShmName(instanceId, absPathToMapFile.string(), getUserName())};
 
    // Test if memory is removed
    BOOST_CHECK(!shm_exists(shmName));
  }
 
  /********************************************************************************************************************/
  BOOST_AUTO_TEST_SUITE_END()
 
  
  static void interrupt_handler(int signal) {
    std::cout << "Caught interrupt signal (" << signal << "). Terminating..." << std::endl;
    terminationCaught = true;
  }
 
} // anonymous namespace