TEvent.h

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#pragma once
#include "TDList.h"
 
TOSHI_NAMESPACE_START
 
class TGenericEmitter;
 
class TGenericListener : public TPriList<TGenericListener>::TNode
{
public:
    using t_Callback = TBOOL( __stdcall* )( void* a_pCaller, void* a_pOwner, void* a_pData );
    friend class TGenericEmitter;
 
public:
    TGenericListener() = default;
    ~TGenericListener();
 
    void Connect( TGenericEmitter& a_rEmitter, void* a_pCaller, t_Callback a_pCallback, TINT a_iPriority );
    void Disconnect();
 
private:
    void Execute( void* pOwner, void* pData );
 
private:
    void*      m_pCaller   = TNULL;
    t_Callback m_pCallback = TNULL;
};
 
class TGenericEmitter
{
public:
    TGenericEmitter();
    TGenericEmitter( void* a_pOwner );
    ~TGenericEmitter() = default;
 
    void Create( void* a_pOwner );
    void Destroy();
 
    void Throw( void* a_pData );
 
    TPriList<TGenericListener>&       GetListeners() { return m_Listeners; }
    const TPriList<TGenericListener>& GetListeners() const { return m_Listeners; }
 
public:
    TPriList<TGenericListener> m_Listeners;
    void*                      m_pOwner;
};
 
template <typename Owner, typename Data = Owner>
class TEmitter : public TGenericEmitter
{
public:
    TEmitter( Owner* owner )
        : TGenericEmitter( owner ) {}
 
    void Throw( Data* pData ) { TGenericEmitter::Throw( pData ); }
    void Throw( Data&& data ) { TGenericEmitter::Throw( &data ); }
 
    void Create( Owner* owner ) { TGenericEmitter::Create( owner ); }
    void Destroy() { TGenericEmitter::Destroy(); }
};
 
template <typename Owner, typename Data, typename Caller>
class TListener : public TGenericListener
{
public:
    using t_CallerCallback = TBOOL( __stdcall* )( Caller* a_pCaller, Owner* a_pOwner, Data* a_pData );
 
public:
    void Connect( TGenericEmitter& a_rEmitter, Caller* a_pCaller, t_CallerCallback a_pCallback, TINT a_iPriority )
    {
        TGenericListener::Connect(
            a_rEmitter,
            a_pCaller,
            TREINTERPRETCAST( t_Callback, a_pCallback ),
            a_iPriority
        );
    }
};
 
TOSHI_NAMESPACE_END