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/*
** ClanLib SDK
** Copyright (c) 1997-2005 The ClanLib Team
**
** This software is provided 'as-is', without any express or implied
** warranty. In no event will the authors be held liable for any damages
** arising from the use of this software.
**
** Permission is granted to anyone to use this software for any purpose,
** including commercial applications, and to alter it and redistribute it
** freely, subject to the following restrictions:
**
** 1. The origin of this software must not be misrepresented; you must not
** claim that you wrote the original software. If you use this software
** in a product, an acknowledgment in the product documentation would be
** appreciated but is not required.
** 2. Altered source versions must be plainly marked as such, and must not be
** misrepresented as being the original software.
** 3. This notice may not be removed or altered from any source distribution.
**
** Note: Some of the libraries ClanLib may link to may have additional
** requirements or restrictions.
**
** File Author(s):
**
** Magnus Norddahl
** (if your name is missing here, please add it)
*/
//! clanCore="System"
//! header=core.h
#ifndef header_keepalive
#define header_keepalive
#include "thread.h"
#ifdef CL_API_DLL
#ifdef CL_CORE_EXPORT
#define CL_API_CORE __declspec(dllexport)
#else
#define CL_API_CORE __declspec(dllimport)
#endif
#else
#define CL_API_CORE
#endif
#if _MSC_VER > 1000
#pragma once
#endif
//: Keep alive callback interface.
//- !group=Core/System!
//- !header=core.h!
//- <p>If you want to add something that gets called in a
//- CL_System::keep_alive() call, inherit this class and create an instance
//- of it.</p>
class CL_API_CORE CL_KeepAlive
{
//! Construction:
public:
//: Constructs and registers the object as a keep_alive listener.
CL_KeepAlive();
//: Unregisters the object as a keep_alive listener.
virtual ~CL_KeepAlive();
//! Operations:
public:
//: Called when CL_System::keep_alive() is called.
virtual void keep_alive()=0;
//! Implementation:
private:
//: Thread ID of thread this keep alive object was created in.
CL_ThreadId create_thread_id;
};
#endif
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