Signal.hpp

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#ifndef DART_COMMON_DETAIL_SIGNAL_HPP_
#define DART_COMMON_DETAIL_SIGNAL_HPP_
 
#include <vector>
 
namespace dart {
namespace common {
 
//==============================================================================
template <typename _Res, typename... _ArgTypes, template <class> class Combiner>
Signal<_Res(_ArgTypes...), Combiner>::Signal()
{
  // Do nothing
}
 
//==============================================================================
template <typename _Res, typename... _ArgTypes, template <class> class Combiner>
Signal<_Res(_ArgTypes...), Combiner>::~Signal()
{
  disconnectAll();
}
 
//==============================================================================
template <typename _Res, typename... _ArgTypes, template <class> class Combiner>
Connection Signal<_Res(_ArgTypes...), Combiner>::connect(const SlotType& _slot)
{
  auto newConnectionBody = std::make_shared<ConnectionBodyType>(*this, _slot);
  mConnectionBodies.insert(newConnectionBody);
 
  return Connection(std::move(newConnectionBody));
}
 
//==============================================================================
template <typename _Res, typename... _ArgTypes, template <class> class Combiner>
Connection Signal<_Res(_ArgTypes...), Combiner>::connect(SlotType&& _slot)
{
  auto newConnectionBody = std::make_shared<ConnectionBodyType>(
      *this, std::forward<SlotType>(_slot));
  mConnectionBodies.insert(newConnectionBody);
 
  return Connection(std::move(newConnectionBody));
}
 
//==============================================================================
template <typename _Res, typename... _ArgTypes, template <class> class Combiner>
void Signal<_Res(_ArgTypes...), Combiner>::disconnect(
    const Connection& _connection) const
{
  _connection.disconnect();
}
 
//==============================================================================
template <typename _Res, typename... _ArgTypes, template <class> class Combiner>
void Signal<_Res(_ArgTypes...), Combiner>::disconnect(
    const std::shared_ptr<Signal::ConnectionBodyType>& connectionBody)
{
  mConnectionBodies.erase(connectionBody);
}
 
//==============================================================================
template <typename _Res, typename... _ArgTypes, template <class> class Combiner>
void Signal<_Res(_ArgTypes...), Combiner>::disconnectAll()
{
  mConnectionBodies.clear();
}
 
//==============================================================================
template <typename _Res, typename... _ArgTypes, template <class> class Combiner>
void Signal<_Res(_ArgTypes...), Combiner>::cleanupConnections()
{
  // Do nothing
}
 
//==============================================================================
template <typename _Res, typename... _ArgTypes, template <class> class Combiner>
std::size_t Signal<_Res(_ArgTypes...), Combiner>::getNumConnections() const
{
  return mConnectionBodies.size();
}
 
//==============================================================================
template <typename _Res, typename... _ArgTypes, template <class> class Combiner>
template <typename... ArgTypes>
_Res Signal<_Res(_ArgTypes...), Combiner>::raise(ArgTypes&&... _args)
{
  std::vector<ResultType> res(mConnectionBodies.size());
  auto resIt = res.begin();
 
  for (const auto& connectionBody : mConnectionBodies)
  {
    *(resIt++) = connectionBody->getSlot()(std::forward<ArgTypes>(_args)...);
  }
 
  return Combiner<ResultType>::process(res.begin(), resIt);
}
 
//==============================================================================
template <typename _Res, typename... _ArgTypes, template <class> class Combiner>
template <typename... ArgTypes>
_Res Signal<_Res(_ArgTypes...), Combiner>::operator()(ArgTypes&&... _args)
{
  return raise(std::forward<ArgTypes>(_args)...);
}
 
//==============================================================================
template <typename... _ArgTypes>
Signal<void(_ArgTypes...)>::Signal()
{
  // Do nothing
}
 
//==============================================================================
template <typename... _ArgTypes>
Signal<void(_ArgTypes...)>::~Signal()
{
  disconnectAll();
}
 
//==============================================================================
template <typename... _ArgTypes>
Connection Signal<void(_ArgTypes...)>::connect(const SlotType& _slot)
{
  auto newConnectionBody = std::make_shared<ConnectionBodyType>(*this, _slot);
  mConnectionBodies.insert(newConnectionBody);
 
  return Connection(std::move(newConnectionBody));
}
 
//==============================================================================
template <typename... _ArgTypes>
Connection Signal<void(_ArgTypes...)>::connect(SlotType&& _slot)
{
  auto newConnectionBody = std::make_shared<ConnectionBodyType>(
      *this, std::forward<SlotType>(_slot));
  mConnectionBodies.insert(newConnectionBody);
 
  return Connection(std::move(newConnectionBody));
}
 
//==============================================================================
template <typename... _ArgTypes>
void Signal<void(_ArgTypes...)>::disconnect(const Connection& _connection) const
{
  _connection.disconnect();
}
 
//==============================================================================
template <typename... _ArgTypes>
void Signal<void(_ArgTypes...)>::disconnect(
    const std::shared_ptr<Signal::ConnectionBodyType>& connectionBody)
{
  mConnectionBodies.erase(connectionBody);
}
 
//==============================================================================
template <typename... _ArgTypes>
void Signal<void(_ArgTypes...)>::disconnectAll()
{
  mConnectionBodies.clear();
}
 
//==============================================================================
template <typename... _ArgTypes>
void Signal<void(_ArgTypes...)>::cleanupConnections()
{
  // Do nothing
}
 
//==============================================================================
template <typename... _ArgTypes>
std::size_t Signal<void(_ArgTypes...)>::getNumConnections() const
{
  return mConnectionBodies.size();
}
 
//==============================================================================
template <typename... _ArgTypes>
template <typename... ArgTypes>
void Signal<void(_ArgTypes...)>::raise(ArgTypes&&... _args)
{
  for (const auto& connectionBody : mConnectionBodies)
  {
    connectionBody->getSlot()(std::forward<ArgTypes>(_args)...);
  }
}
 
//==============================================================================
template <typename... _ArgTypes>
template <typename... ArgTypes>
void Signal<void(_ArgTypes...)>::operator()(ArgTypes&&... _args)
{
  raise(std::forward<ArgTypes>(_args)...);
}
 
//==============================================================================
template <typename T>
SlotRegister<T>::SlotRegister(typename T::SignalType& _signal)
  : mSignal(_signal)
{
  // Do nothing
}
 
//==============================================================================
template <typename T>
Connection SlotRegister<T>::connect(const SlotType& _slot)
{
  return mSignal.connect(_slot);
}
 
} // namespace common
} // namespace dart
 
#endif // DART_COMMON_DETAIL_SIGNAL_HPP_