VoidAccessor.h

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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
#pragma once
 
#include "Application.h"
#include "InversionOfControlAccessor.h"
 
#include <ChimeraTK/VoidRegisterAccessor.h>
 
#include <string>
 
namespace ChimeraTK {
 
  /********************************************************************************************************************/
 
  class VoidAccessor : public ChimeraTK::VoidRegisterAccessor, public InversionOfControlAccessor<VoidAccessor> {
   public:
    using InversionOfControlAccessor<VoidAccessor>::operator VariableNetworkNode;
    void replace(const ChimeraTK::NDRegisterAccessorAbstractor<ChimeraTK::Void>& newAccessor) = delete;
    using InversionOfControlAccessor<VoidAccessor>::replace;
    VoidAccessor& operator=(VoidAccessor& other) = delete;
    using ChimeraTK::VoidRegisterAccessor::operator=;
 
    VoidAccessor(VoidAccessor&& other) noexcept;
 
    VoidAccessor& operator=(VoidAccessor&& other) noexcept;
 
    bool write(ChimeraTK::VersionNumber versionNumber) = delete;
    bool writeDestructively(ChimeraTK::VersionNumber versionNumber) = delete;
    // void writeIfDifferent(UserType newValue, VersionNumber versionNumber) = delete;
 
    bool write();
 
    bool writeDestructively();
 
   protected:
    friend class InversionOfControlAccessor<VoidAccessor>;
 
    VoidAccessor(Module* owner, const std::string& name, VariableDirection direction, std::string& unit,
        UpdateMode mode, const std::string& description, const std::unordered_set<std::string>& tags = {});
 
    VoidAccessor(Module* owner, const std::string& name, VariableDirection direction, UpdateMode mode,
        const std::string& description, const std::unordered_set<std::string>& tags = {});
 
    VoidAccessor() = default;
  };
 
  /********************************************************************************************************************/
 
  struct VoidInput : public VoidAccessor {
    VoidInput(Module* owner, const std::string& name, const std::string& description,
        const std::unordered_set<std::string>& tags = {})
    : VoidAccessor(owner, name, {VariableDirection::consuming, false}, UpdateMode::push, description, tags) {}
 
    VoidInput() = default;
    using VoidAccessor::operator=;
  };
 
  /********************************************************************************************************************/
 
  struct VoidOutput : public VoidAccessor {
    VoidOutput(Module* owner, const std::string& name, const std::string& description,
        const std::unordered_set<std::string>& tags = {})
    : VoidAccessor(owner, name, {VariableDirection::feeding, false}, UpdateMode::push, description, tags) {}
 
    VoidOutput() = default;
    using VoidAccessor::operator=;
  };
 
  /********************************************************************************************************************/
  /********************************************************************************************************************/
  /* Implementations below this point                                                                                 */
  /********************************************************************************************************************/
  /********************************************************************************************************************/
 
  inline VoidAccessor::VoidAccessor(VoidAccessor&& other) noexcept {
    try {
      InversionOfControlAccessor<VoidAccessor>::replace(std::move(other));
    }
    catch(ChimeraTK::logic_error& e) {
      std::cerr << "ChimeraTK::logic_error caught: " << e.what() << std::endl;
      std::terminate();
    }
  }
 
  /********************************************************************************************************************/
 
  inline VoidAccessor& VoidAccessor::operator=(VoidAccessor&& other) noexcept {
    // Having a move-assignment operator is required to use the move-assignment
    // operator of a module containing an accessor.
    try {
      InversionOfControlAccessor<VoidAccessor>::replace(std::move(other));
    }
    catch(ChimeraTK::logic_error& e) {
      std::cerr << "ChimeraTK::logic_error caught: " << e.what() << std::endl;
      std::terminate();
    }
    return *this;
  }
 
  /********************************************************************************************************************/
 
  inline bool VoidAccessor::write() {
    auto versionNumber = this->getOwner()->getCurrentVersionNumber();
    bool dataLoss = ChimeraTK::VoidRegisterAccessor::write(versionNumber);
    if(dataLoss) {
      Application::incrementDataLossCounter(this->_node.getQualifiedName());
    }
    return dataLoss;
  }
 
  /********************************************************************************************************************/
 
  inline bool VoidAccessor::writeDestructively() {
    auto versionNumber = this->getOwner()->getCurrentVersionNumber();
    bool dataLoss = ChimeraTK::VoidRegisterAccessor::writeDestructively(versionNumber);
    if(dataLoss) {
      Application::incrementDataLossCounter(this->_node.getQualifiedName());
    }
    return dataLoss;
  }
 
  /********************************************************************************************************************/
 
  inline VoidAccessor::VoidAccessor(Module* owner, const std::string& name, VariableDirection direction,
      std::string& unit, UpdateMode mode, const std::string& description, const std::unordered_set<std::string>& tags)
  : InversionOfControlAccessor<VoidAccessor>(
        owner, name, direction, unit, 1, mode, description, &typeid(ChimeraTK::Void), tags) {}
 
  /********************************************************************************************************************/
 
  inline VoidAccessor::VoidAccessor(Module* owner, const std::string& name, VariableDirection direction,
      UpdateMode mode, const std::string& description, const std::unordered_set<std::string>& tags)
  : InversionOfControlAccessor<VoidAccessor>(
        owner, name, direction, "", 1, mode, description, &typeid(ChimeraTK::Void), tags) {}
 
  /********************************************************************************************************************/
 
} /* namespace ChimeraTK */