SlotCall.hpp

/* ***** BEGIN LICENSE BLOCK *****
 * FW4SPL - Copyright (C) IRCAD, 2009-2017.
 * Distributed under the terms of the GNU Lesser General Public License (LGPL) as
 * published by the Free Software Foundation.
 * ****** END LICENSE BLOCK ****** */

#ifndef __FWCOM_SLOTCALL_HPP__
#define __FWCOM_SLOTCALL_HPP__

#include "fwCom/SlotRun.hpp"

namespace fwThread
{
class Worker;
}

namespace fwCom
{

template< typename F >
struct SlotCall;

template< typename R, typename ... A >
struct SlotCall< R(A ...) > : SlotRun< void ( A ... ) >
{
    typedef R SignatureType (A ...);
    typedef SlotCall< SignatureType > SelfType;
    typedef SPTR ( SelfType ) sptr;
    typedef WPTR ( SelfType ) wptr;
    typedef std::shared_future< R > SharedFutureType;
    SlotCall() :
        SlotRun< void ( A ... ) >()
    {
    }

    virtual ~SlotCall()
    {
    }

    virtual R call(A ...) const = 0;

    virtual SharedFutureType asyncCall( const SPTR(::fwThread::Worker)& worker, A ... args ) const;

    virtual SharedFutureType asyncCall( A ... args ) const;

    protected:

        template< typename WEAKCALL >
        static std::shared_future< R > postWeakCall( const SPTR(::fwThread::Worker)& worker, WEAKCALL f );

        virtual std::function< R() > bindCall( A ... args  ) const;
};

} // namespace fwCom

#endif /* __FWCOM_SLOTCALL_HPP__ */