//===== Copyright c 1996-2009, Valve Corporation, All rights reserved. ======//
//
// Purpose: 
//
// $NoKeywords: $
//===========================================================================//

#ifndef IMATCHASYNC_H
#define IMATCHASYNC_H

#ifdef _WIN32
#pragma once
#endif

//
// Describes possible states of an async operation
//
enum AsyncOperationState_t
{
	AOS_RUNNING,
	AOS_ABORTING,
	AOS_ABORTED,
	AOS_FAILED,
	AOS_SUCCEEDED,
};

//
// Interface of an async operation
//
abstract_class IMatchAsyncOperation
{
public:
	// Poll if operation has completed
	virtual bool IsFinished() = 0;

	// Operation state
	virtual AsyncOperationState_t GetState() = 0;

	// Retrieve a generic completion result for simple operations
	// that return simple results upon success,
	// results are operation-specific, may result in undefined behavior
	// if operation is still in progress.
	virtual uint64 GetResult() = 0;

	// Request operation to be aborted
	virtual void Abort() = 0;

	// Release the operation interface and all resources
	// associated with the operation. Operation callbacks
	// will not be called after Release. Operation object
	// cannot be accessed after Release.
	virtual void Release() = 0;
};

abstract_class IMatchAsyncOperationCallback
{
public:
	// Signals when operation has finished
	virtual void OnOperationFinished( IMatchAsyncOperation *pOperation ) = 0;
};

#endif // IMATCHASYNC_H