/**

 * vim: set ts=4 :

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

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

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

 *

 * This file is part of the SourceMod/SourcePawn SDK.

 *

 * This program is free software; you can redistribute it and/or modify it under

 * the terms of the GNU General Public License, version 3.0, as published by the

 * Free Software Foundation.

 * 

 * 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/>.

 *

 * As a special exception, AlliedModders LLC gives you permission to link the

 * code of this program (as well as its derivative works) to "Half-Life 2," the

 * "Source Engine," the "SourcePawn JIT," and any Game MODs that run on software

 * by the Valve Corporation.  You must obey the GNU General Public License in

 * all respects for all other code used.  Additionally, AlliedModders LLC grants

 * this exception to all derivative works.  AlliedModders LLC defines further

 * exceptions, found in LICENSE.txt (as of this writing, version JULY-31-2007),

 * or <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,

};

/**

 * 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);

/**

 * Do not use this function.  Returns if a Handle and its contents 

 * are readable, whereas INVALID_HANDLE only checks for the absence 

 * of a Handle.

 *

 * This function is intended only for tests where the validity of a 

 * Handle can absolutely not be known. 

 *

 * Do not use this to check the return values of functions, or to 

 * check if timers should be closed (except in very rare cases).  

 * This function is for very specific usage and using it for general 

 * purpose routines can and will hide very subtle bugs.

 *

 * @param hndl		Handle to test for validity.

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

 */

native bool:IsValidHandle(Handle:hndl);