/**

 * vim: set ts=4 :

 * ===============================================================

 * SourceMod (C)2004-2007 AlliedModders LLC.  All rights reserved.

 * ===============================================================

 *

 *  This file is part of the SourceMod/SourcePawn SDK.  This file may only be used 

 * or modified under the Terms and Conditions of its License Agreement, which is found 

 * in LICENSE.txt.  The Terms and Conditions for making SourceMod extensions/plugins 

 * may change at any time.  To view the latest information, see:

 *   http://www.sourcemod.net/license.php

 *

 * Version: $Id$

 */

#if defined _handles_included

 #endinput

#endif

#define _handles_included

/**

 * Handle helper macros.

 */

enum Handle

{

	INVALID_HANDLE = 0,

};

/**

 * Returns if a handle is valid or not.

 * @note It is not a good idea to call this on every Handle.  If you code properly,

 *       all of your Handles will either be valid or will expose important bugs to fix.

 *       This is provided for situations only where testing for handle validity is needed.

 *

 * @param hndl		Handle to test for validity.

 * @return			True if handle is valid, false otherwise.

 */

native bool:IsValidHandle(Handle:hndl);

/**

 * Closes a Handle.  If the handle has multiple copies open, 

 * it is not destroyed unless all copies are closed.

 * 

 * @note Closing a Handle has a different meaning for each Handle type.  Make

 *       sure you read the documentation on whatever provided the Handle.

 *

 * @param hndl		Handle to close.

 * @return			True if successful, false if not closeable.

 * @error			Invalid handles will cause a run time error.

 */

native bool:CloseHandle(Handle:hndl);

/**

 * Clones a Handle.  When passing handles in between plugins, caching handles

 * can result in accidental invalidation when one plugin releases the Handle, or is its owner

 * is unloaded from memory.  To prevent this, the Handle may be "cloned" with a new owner.

 * 

 * @note Usually, you will be cloning Handles for other plugins.  This means that if you clone

 * the Handle without specifying the new owner, it will assume the identity of your original calling

 * plugin, which is not very useful.  You should either specify that the receiving plugin should

 * clone the handle on its own, or you should explicitly clone the Handle using the receiving plugin's

 * identity Handle.

 *

 * @param hndl		Handle to clone/duplicate.

 * @param plugin	Optional Handle to another plugin to mark as the new owner.

 *					If no owner is passed, the owner becomes the calling plugin.

 * @return			Handle on success, INVALID_HANDLE if not cloneable.

 * @error			Invalid handles will cause a run time error.

 */

native Handle:CloneHandle(Handle:hndl, Handle:plugin=INVALID_HANDLE);