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	1	/*
	2	* Copyright (c) 1998-2000 Apple Computer, Inc. All rights reserved.
	3	*
	4	* @APPLE_OSREFERENCE_LICENSE_HEADER_START@
	5	*
	6	* This file contains Original Code and/or Modifications of Original Code
	7	* as defined in and that are subject to the Apple Public Source License
	8	* Version 2.0 (the 'License'). You may not use this file except in
	9	* compliance with the License. The rights granted to you under the License
	10	* may not be used to create, or enable the creation or redistribution of,
	11	* unlawful or unlicensed copies of an Apple operating system, or to
	12	* circumvent, violate, or enable the circumvention or violation of, any
	13	* terms of an Apple operating system software license agreement.
	14	*
	15	* Please obtain a copy of the License at
	16	* http://www.opensource.apple.com/apsl/ and read it before using this file.
	17	*
	18	* The Original Code and all software distributed under the License are
	19	* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
	20	* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
	21	* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
	22	* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
	23	* Please see the License for the specific language governing rights and
	24	* limitations under the License.
	25	*
	26	* @APPLE_OSREFERENCE_LICENSE_HEADER_END@
	27	*/
	28	/*
	29	Copyright (c) 1998 Apple Computer, Inc. All rights reserved.
	30
	31	HISTORY
	32	1998-7-13 Godfrey van der Linden(gvdl)
	33	Created.
	34	1998-10-30 Godfrey van der Linden(gvdl)
	35	Converted to C++
	36	1999-9-22 Godfrey van der Linden(gvdl)
	37	Deprecated
	38	]*/
	39	#ifndef _IOKIT_IOCOMMANDQUEUE_H
	40	#define _IOKIT_IOCOMMANDQUEUE_H
	41
	42	#include <IOKit/IOEventSource.h>
	43
	44
	45	#define DEPRECATED __attribute__((deprecated))
	46
	47	class IOCommandQueue;
	48
	49	typedef void (*IOCommandQueueAction)
	50	(OSObject , void field0, void field1, void field2, void *field3);
	51
	52	class IOCommandQueue : public IOEventSource
	53	{
	54	OSDeclareDefaultStructors(IOCommandQueue)
	55
	56	protected:
	57	static const int kIOCQDefaultSize = 128;
	58
	59	void *queue;
	60	IOLock *producerLock;
	61	semaphore_port_t producerSema;
	62	int producerIndex, consumerIndex;
	63	int size;
	64
	65	virtual void free();
	66
	67	virtual bool checkForWork();
	68
	69	public:
	70	static IOCommandQueue commandQueue(OSObject inOwner,
	71	IOCommandQueueAction inAction = 0,
	72	int inSize = kIOCQDefaultSize)
	73	DEPRECATED;
	74	virtual bool init(OSObject *inOwner,
	75	IOCommandQueueAction inAction = 0,
	76	int inSize = kIOCQDefaultSize)
	77	DEPRECATED;
	78
	79	virtual kern_return_t enqueueCommand(bool gotoSleep = true,
	80	void field0 = 0, void field1 = 0,
	81	void field2 = 0, void field3 = 0)
	82	DEPRECATED;
	83
	84	// WARNING: This function can only be safely called from the appropriate
	85	// work loop context. You should check IOWorkLoop::onThread is true.
	86	//
	87	// For each entry in the commandQueue call the target/action.
	88	// Lockout all new entries to the queue while iterating.
	89	// If the input fields are zero then the queue's owner/action will be used.
	90	virtual int performAndFlush(OSObject *target = 0,
	91	IOCommandQueueAction inAction = 0)
	92	DEPRECATED;
	93	};
	94
	95	#endif /* !_IOKIT_IOCOMMANDQUEUE_H */