SignalBus.h

/******************************************************************************
DSPatch - The Refreshingly Simple C++ Dataflow Framework
Copyright (c) 2023, Marcus Tomlinson
 
BSD 2-Clause License
 
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#pragma once
 
#include <dspatch/Signal.h>
 
#include <deque>
 
namespace DSPatch
{
 
namespace internal
{
class SignalBus;
}
 
 
class DLLEXPORT SignalBus final
{
public:
    NONCOPYABLE( SignalBus );
 
    SignalBus();
    SignalBus( SignalBus&& );
    ~SignalBus();
 
    void SetSignalCount( int signalCount );
    int GetSignalCount() const;
 
    Signal& GetSignal( int signalIndex );
 
    bool HasValue( int signalIndex ) const;
 
    template <class ValueType>
    ValueType* GetValue( int signalIndex );
 
    template <class ValueType>
    bool SetValue( int signalIndex, ValueType const& newValue );
 
    template <class ValueType>
    bool MoveValue( int signalIndex, ValueType&& newValue );
 
    bool SetSignal( int toSignalIndex, Signal const& fromSignal );
    bool MoveSignal( int toSignalIndex, Signal& fromSignal );
 
    void ClearAllValues();
 
    std::type_info const& GetType( int signalIndex ) const;
 
private:
    std::deque<Signal> _signals;
 
    std::unique_ptr<internal::SignalBus> p;
};
 
template <class ValueType>
ValueType* SignalBus::GetValue( int signalIndex )
{
    if ( (size_t)signalIndex < _signals.size() )
    {
        return _signals[signalIndex].GetValue<ValueType>();
    }
    else
    {
        return nullptr;
    }
}
 
template <class ValueType>
bool SignalBus::SetValue( int signalIndex, ValueType const& newValue )
{
    if ( (size_t)signalIndex < _signals.size() )
    {
        _signals[signalIndex].SetValue( newValue );
        return true;
    }
    else
    {
        return false;
    }
}
 
template <class ValueType>
bool SignalBus::MoveValue( int signalIndex, ValueType&& newValue )
{
    if ( (size_t)signalIndex < _signals.size() )
    {
        _signals[signalIndex].MoveValue( std::move( newValue ) );
        return true;
    }
    else
    {
        return false;
    }
}
 
}  // namespace DSPatch