ClickHouse/base/poco/Foundation/include/Poco/PriorityDelegate.h

//
// PriorityDelegate.h
//
// Library: Foundation
// Package: Events
// Module:  PriorityDelegate
//
// Implementation of the PriorityDelegate template.
//
// Copyright (c) 2006-2011, Applied Informatics Software Engineering GmbH.
// and Contributors.
//
// SPDX-License-Identifier:	BSL-1.0
//


#ifndef Foundation_PriorityDelegate_INCLUDED
#define Foundation_PriorityDelegate_INCLUDED


#include "Poco/AbstractPriorityDelegate.h"
#include "Poco/Foundation.h"
#include "Poco/FunctionPriorityDelegate.h"
#include "Poco/Mutex.h"
#include "Poco/PriorityExpire.h"


namespace Poco
{


template <class TObj, class TArgs, bool useSender = true>
class PriorityDelegate : public AbstractPriorityDelegate<TArgs>
{
public:
    typedef void (TObj::*NotifyMethod)(const void *, TArgs &);

    PriorityDelegate(TObj * obj, NotifyMethod method, int prio)
        : AbstractPriorityDelegate<TArgs>(prio), _receiverObject(obj), _receiverMethod(method)
    {
    }

    PriorityDelegate(const PriorityDelegate & delegate)
        : AbstractPriorityDelegate<TArgs>(delegate), _receiverObject(delegate._receiverObject), _receiverMethod(delegate._receiverMethod)
    {
    }

    PriorityDelegate & operator=(const PriorityDelegate & delegate)
    {
        if (&delegate != this)
        {
            this->_pTarget = delegate._pTarget;
            this->_receiverObject = delegate._receiverObject;
            this->_receiverMethod = delegate._receiverMethod;
            this->_priority = delegate._priority;
        }
        return *this;
    }

    ~PriorityDelegate() { }

    bool notify(const void * sender, TArgs & arguments)
    {
        Mutex::ScopedLock lock(_mutex);
        if (_receiverObject)
        {
            (_receiverObject->*_receiverMethod)(sender, arguments);
            return true;
        }
        else
            return false;
    }

    bool equals(const AbstractDelegate<TArgs> & other) const
    {
        const PriorityDelegate * pOtherDelegate = dynamic_cast<const PriorityDelegate *>(other.unwrap());
        return pOtherDelegate && this->priority() == pOtherDelegate->priority() && _receiverObject == pOtherDelegate->_receiverObject
            && _receiverMethod == pOtherDelegate->_receiverMethod;
    }

    AbstractDelegate<TArgs> * clone() const { return new PriorityDelegate(*this); }

    void disable()
    {
        Mutex::ScopedLock lock(_mutex);
        _receiverObject = 0;
    }

protected:
    TObj * _receiverObject;
    NotifyMethod _receiverMethod;
    Mutex _mutex;

private:
    PriorityDelegate();
};


template <class TObj, class TArgs>
class PriorityDelegate<TObj, TArgs, false> : public AbstractPriorityDelegate<TArgs>
{
public:
    typedef void (TObj::*NotifyMethod)(TArgs &);

    PriorityDelegate(TObj * obj, NotifyMethod method, int prio)
        : AbstractPriorityDelegate<TArgs>(prio), _receiverObject(obj), _receiverMethod(method)
    {
    }

    PriorityDelegate(const PriorityDelegate & delegate)
        : AbstractPriorityDelegate<TArgs>(delegate), _receiverObject(delegate._receiverObject), _receiverMethod(delegate._receiverMethod)
    {
    }

    PriorityDelegate & operator=(const PriorityDelegate & delegate)
    {
        if (&delegate != this)
        {
            this->_pTarget = delegate._pTarget;
            this->_receiverObject = delegate._receiverObject;
            this->_receiverMethod = delegate._receiverMethod;
            this->_priority = delegate._priority;
        }
        return *this;
    }

    ~PriorityDelegate() { }

    bool notify(const void * sender, TArgs & arguments)
    {
        Mutex::ScopedLock lock(_mutex);
        if (_receiverObject)
        {
            (_receiverObject->*_receiverMethod)(arguments);
            return true;
        }
        return false;
    }

    bool equals(const AbstractDelegate<TArgs> & other) const
    {
        const PriorityDelegate * pOtherDelegate = dynamic_cast<const PriorityDelegate *>(other.unwrap());
        return pOtherDelegate && this->priority() == pOtherDelegate->priority() && _receiverObject == pOtherDelegate->_receiverObject
            && _receiverMethod == pOtherDelegate->_receiverMethod;
    }

    AbstractDelegate<TArgs> * clone() const { return new PriorityDelegate(*this); }

    void disable()
    {
        Mutex::ScopedLock lock(_mutex);
        _receiverObject = 0;
    }

protected:
    TObj * _receiverObject;
    NotifyMethod _receiverMethod;
    Mutex _mutex;

private:
    PriorityDelegate();
};


template <class TObj>
class PriorityDelegate<TObj, void, true> : public AbstractPriorityDelegate<void>
{
public:
    typedef void (TObj::*NotifyMethod)(const void *);

    PriorityDelegate(TObj * obj, NotifyMethod method, int prio)
        : AbstractPriorityDelegate<void>(prio), _receiverObject(obj), _receiverMethod(method)
    {
    }

    PriorityDelegate(const PriorityDelegate & delegate)
        : AbstractPriorityDelegate<void>(delegate), _receiverObject(delegate._receiverObject), _receiverMethod(delegate._receiverMethod)
    {
    }

    PriorityDelegate & operator=(const PriorityDelegate & delegate)
    {
        if (&delegate != this)
        {
            this->_pTarget = delegate._pTarget;
            this->_receiverObject = delegate._receiverObject;
            this->_receiverMethod = delegate._receiverMethod;
            this->_priority = delegate._priority;
        }
        return *this;
    }

    ~PriorityDelegate() { }

    bool notify(const void * sender)
    {
        Mutex::ScopedLock lock(_mutex);
        if (_receiverObject)
        {
            (_receiverObject->*_receiverMethod)(sender);
            return true;
        }
        else
            return false;
    }

    bool equals(const AbstractDelegate<void> & other) const
    {
        const PriorityDelegate * pOtherDelegate = dynamic_cast<const PriorityDelegate *>(other.unwrap());
        return pOtherDelegate && this->priority() == pOtherDelegate->priority() && _receiverObject == pOtherDelegate->_receiverObject
            && _receiverMethod == pOtherDelegate->_receiverMethod;
    }

    AbstractDelegate<void> * clone() const { return new PriorityDelegate(*this); }

    void disable()
    {
        Mutex::ScopedLock lock(_mutex);
        _receiverObject = 0;
    }

protected:
    TObj * _receiverObject;
    NotifyMethod _receiverMethod;
    Mutex _mutex;

private:
    PriorityDelegate();
};


template <class TObj>
class PriorityDelegate<TObj, void, false> : public AbstractPriorityDelegate<void>
{
public:
    typedef void (TObj::*NotifyMethod)();

    PriorityDelegate(TObj * obj, NotifyMethod method, int prio)
        : AbstractPriorityDelegate<void>(prio), _receiverObject(obj), _receiverMethod(method)
    {
    }

    PriorityDelegate(const PriorityDelegate & delegate)
        : AbstractPriorityDelegate<void>(delegate), _receiverObject(delegate._receiverObject), _receiverMethod(delegate._receiverMethod)
    {
    }

    PriorityDelegate & operator=(const PriorityDelegate & delegate)
    {
        if (&delegate != this)
        {
            this->_pTarget = delegate._pTarget;
            this->_receiverObject = delegate._receiverObject;
            this->_receiverMethod = delegate._receiverMethod;
            this->_priority = delegate._priority;
        }
        return *this;
    }

    ~PriorityDelegate() { }

    bool notify(const void * sender)
    {
        Mutex::ScopedLock lock(_mutex);
        if (_receiverObject)
        {
            (_receiverObject->*_receiverMethod)();
            return true;
        }
        return false;
    }

    bool equals(const AbstractDelegate<void> & other) const
    {
        const PriorityDelegate * pOtherDelegate = dynamic_cast<const PriorityDelegate *>(other.unwrap());
        return pOtherDelegate && this->priority() == pOtherDelegate->priority() && _receiverObject == pOtherDelegate->_receiverObject
            && _receiverMethod == pOtherDelegate->_receiverMethod;
    }

    AbstractDelegate<void> * clone() const { return new PriorityDelegate(*this); }

    void disable()
    {
        Mutex::ScopedLock lock(_mutex);
        _receiverObject = 0;
    }

protected:
    TObj * _receiverObject;
    NotifyMethod _receiverMethod;
    Mutex _mutex;

private:
    PriorityDelegate();
};


template <class TObj, class TArgs>
static PriorityDelegate<TObj, TArgs, true> priorityDelegate(TObj * pObj, void (TObj::*NotifyMethod)(const void *, TArgs &), int prio)
{
    return PriorityDelegate<TObj, TArgs, true>(pObj, NotifyMethod, prio);
}


template <class TObj, class TArgs>
static PriorityDelegate<TObj, TArgs, false> priorityDelegate(TObj * pObj, void (TObj::*NotifyMethod)(TArgs &), int prio)
{
    return PriorityDelegate<TObj, TArgs, false>(pObj, NotifyMethod, prio);
}


template <class TObj, class TArgs>
static PriorityExpire<TArgs>
priorityDelegate(TObj * pObj, void (TObj::*NotifyMethod)(const void *, TArgs &), int prio, Timestamp::TimeDiff expireMilliSec)
{
    return PriorityExpire<TArgs>(PriorityDelegate<TObj, TArgs, true>(pObj, NotifyMethod, prio), expireMilliSec);
}


template <class TObj, class TArgs>
static PriorityExpire<TArgs>
priorityDelegate(TObj * pObj, void (TObj::*NotifyMethod)(TArgs &), int prio, Timestamp::TimeDiff expireMilliSec)
{
    return PriorityExpire<TArgs>(PriorityDelegate<TObj, TArgs, false>(pObj, NotifyMethod, prio), expireMilliSec);
}


template <class TArgs>
static PriorityExpire<TArgs> priorityDelegate(void (*NotifyMethod)(const void *, TArgs &), int prio, Timestamp::TimeDiff expireMilliSec)
{
    return PriorityExpire<TArgs>(FunctionPriorityDelegate<TArgs, true, true>(NotifyMethod, prio), expireMilliSec);
}


template <class TArgs>
static PriorityExpire<TArgs> priorityDelegate(void (*NotifyMethod)(void *, TArgs &), int prio, Timestamp::TimeDiff expireMilliSec)
{
    return PriorityExpire<TArgs>(FunctionPriorityDelegate<TArgs, true, false>(NotifyMethod, prio), expireMilliSec);
}


template <class TArgs>
static PriorityExpire<TArgs> priorityDelegate(void (*NotifyMethod)(TArgs &), int prio, Timestamp::TimeDiff expireMilliSec)
{
    return PriorityExpire<TArgs>(FunctionPriorityDelegate<TArgs, false>(NotifyMethod, prio), expireMilliSec);
}


template <class TArgs>
static FunctionPriorityDelegate<TArgs, true, true> priorityDelegate(void (*NotifyMethod)(const void *, TArgs &), int prio)
{
    return FunctionPriorityDelegate<TArgs, true, true>(NotifyMethod, prio);
}


template <class TArgs>
static FunctionPriorityDelegate<TArgs, true, false> priorityDelegate(void (*NotifyMethod)(void *, TArgs &), int prio)
{
    return FunctionPriorityDelegate<TArgs, true, false>(NotifyMethod, prio);
}


template <class TArgs>
static FunctionPriorityDelegate<TArgs, false> priorityDelegate(void (*NotifyMethod)(TArgs &), int prio)
{
    return FunctionPriorityDelegate<TArgs, false>(NotifyMethod, prio);
}


template <class TObj>
static PriorityDelegate<TObj, void, true> priorityDelegate(TObj * pObj, void (TObj::*NotifyMethod)(const void *), int prio)
{
    return PriorityDelegate<TObj, void, true>(pObj, NotifyMethod, prio);
}


template <class TObj>
static PriorityDelegate<TObj, void, false> priorityDelegate(TObj * pObj, void (TObj::*NotifyMethod)(), int prio)
{
    return PriorityDelegate<TObj, void, false>(pObj, NotifyMethod, prio);
}


template <class TObj>
static PriorityExpire<void>
priorityDelegate(TObj * pObj, void (TObj::*NotifyMethod)(const void *), int prio, Timestamp::TimeDiff expireMilliSec)
{
    return PriorityExpire<void>(PriorityDelegate<TObj, void, true>(pObj, NotifyMethod, prio), expireMilliSec);
}


template <class TObj>
static PriorityExpire<void> priorityDelegate(TObj * pObj, void (TObj::*NotifyMethod)(), int prio, Timestamp::TimeDiff expireMilliSec)
{
    return PriorityExpire<void>(PriorityDelegate<TObj, void, false>(pObj, NotifyMethod, prio), expireMilliSec);
}


inline PriorityExpire<void> priorityDelegate(void (*NotifyMethod)(const void *), int prio, Timestamp::TimeDiff expireMilliSec)
{
    return PriorityExpire<void>(FunctionPriorityDelegate<void, true, true>(NotifyMethod, prio), expireMilliSec);
}


inline PriorityExpire<void> priorityDelegate(void (*NotifyMethod)(void *), int prio, Timestamp::TimeDiff expireMilliSec)
{
    return PriorityExpire<void>(FunctionPriorityDelegate<void, true, false>(NotifyMethod, prio), expireMilliSec);
}


inline PriorityExpire<void> priorityDelegate(void (*NotifyMethod)(), int prio, Timestamp::TimeDiff expireMilliSec)
{
    return PriorityExpire<void>(FunctionPriorityDelegate<void, false>(NotifyMethod, prio), expireMilliSec);
}


inline FunctionPriorityDelegate<void, true, true> priorityDelegate(void (*NotifyMethod)(const void *), int prio)
{
    return FunctionPriorityDelegate<void, true, true>(NotifyMethod, prio);
}


inline FunctionPriorityDelegate<void, true, false> priorityDelegate(void (*NotifyMethod)(void *), int prio)
{
    return FunctionPriorityDelegate<void, true, false>(NotifyMethod, prio);
}


inline FunctionPriorityDelegate<void, false> priorityDelegate(void (*NotifyMethod)(), int prio)
{
    return FunctionPriorityDelegate<void, false>(NotifyMethod, prio);
}


} // namespace Poco


#endif // Foundation_PriorityDelegate_INCLUDED