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/*
* InspIRCd -- Internet Relay Chat Daemon
*
* Copyright (C) 2019-2023 Sadie Powell <sadie@witchery.services>
* Copyright (C) 2013, 2015 Attila Molnar <attilamolnar@hush.com>
*
* This file is part of InspIRCd. InspIRCd is free software: you can
* redistribute it and/or modify it under the terms of the GNU General Public
* License as published by the Free Software Foundation, version 2.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
* FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
* details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#pragma once
#include "base.h"
class CoreExport dynamic_reference_base
: public insp::intrusive_list_node<dynamic_reference_base>
{
public:
class CaptureHook
{
public:
/** Called when the target of the dynamic_reference has been acquired
*/
virtual void OnCapture() = 0;
};
private:
std::string name;
CaptureHook* hook = nullptr;
void resolve();
static void* operator new(std::size_t) = delete;
static void* operator new[](std::size_t) = delete;
protected:
ServiceProvider* value = nullptr;
public:
ModuleRef creator;
dynamic_reference_base(Module* Creator, const std::string& Name);
dynamic_reference_base(const dynamic_reference_base&) = default;
~dynamic_reference_base();
dynamic_reference_base& operator=(const dynamic_reference_base& rhs)
{
SetProvider(rhs.GetProvider());
return *this;
}
inline const std::string& GetProvider() const { return name; }
void ClearProvider();
void SetProvider(const std::string& newname);
/** Set handler to call when the target object becomes available
* @param h Handler to call
*/
void SetCaptureHook(CaptureHook* h) { hook = h; }
void check();
operator bool() const { return (value != nullptr); }
static void reset_all();
};
inline void dynamic_reference_base::check()
{
if (!value)
throw ModuleException(creator, "Dynamic reference to '" + name + "' failed to resolve. Are you missing a module?");
}
template<typename T>
class dynamic_reference
: public dynamic_reference_base
{
public:
dynamic_reference(Module* Creator, const std::string& Name)
: dynamic_reference_base(Creator, Name) {}
inline T* operator->()
{
check();
return static_cast<T*>(value);
}
T* operator*()
{
return operator->();
}
const T* operator->() const
{
return static_cast<T*>(value);
}
const T* operator*() const
{
return operator->();
}
};
template<typename T>
class dynamic_reference_nocheck
: public dynamic_reference_base
{
public:
dynamic_reference_nocheck(Module* Creator, const std::string& Name)
: dynamic_reference_base(Creator, Name) {}
T* operator->()
{
return static_cast<T*>(value);
}
T* operator*()
{
return operator->();
}
const T* operator->() const
{
return static_cast<T*>(value);
}
const T* operator*() const
{
return operator->();
}
};
class ModeHandler;
class ChanModeReference final
: public dynamic_reference_nocheck<ModeHandler>
{
public:
ChanModeReference(Module* mod, const std::string& modename)
: dynamic_reference_nocheck<ModeHandler>(mod, "mode/" + modename) {}
};
class UserModeReference final
: public dynamic_reference_nocheck<ModeHandler>
{
public:
UserModeReference(Module* mod, const std::string& modename)
: dynamic_reference_nocheck<ModeHandler>(mod, "umode/" + modename) {}
};
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