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Commit	Line	Data
	1	/*
	2	* Copyright (c) 2006 Apple Computer, Inc. All Rights Reserved.
	3	*
	4	* @APPLE_LICENSE_OSREFERENCE_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
	10	* License may not be used to create, or enable the creation or
	11	* redistribution of, unlawful or unlicensed copies of an Apple operating
	12	* system, or to circumvent, violate, or enable the circumvention or
	13	* violation of, any terms of an Apple operating system software license
	14	* agreement.
	15	*
	16	* Please obtain a copy of the License at
	17	* http://www.opensource.apple.com/apsl/ and read it before using this
	18	* file.
	19	*
	20	* The Original Code and all software distributed under the License are
	21	* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
	22	* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
	23	* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
	24	* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
	25	* Please see the License for the specific language governing rights and
	26	* limitations under the License.
	27	*
	28	* @APPLE_LICENSE_OSREFERENCE_HEADER_END@
	29	*/
	30	/*
	31	* File: sys/aio_kern.h
	32	* Author: Jerry Cottingham [jerryc@apple.com]
	33	*
	34	* Header file for kernel only portion of POSIX Asynchronous IO APIs
	35	*
	36	*/
	37
	38	#include <sys/aio.h>
	39
	40	#ifndef _SYS_AIO_KERN_H_
	41	#define _SYS_AIO_KERN_H_
	42
	43	#ifdef KERNEL
	44
	45	struct aio_workq_entry
	46	{
	47	TAILQ_ENTRY( aio_workq_entry ) aio_workq_link;
	48	struct proc procp; / user proc that queued this request */
	49	user_addr_t uaiocbp; /* pointer passed in from user land */
	50	user_addr_t fsyncp; /* not NULL means this request must complete */
	51	/* before an aio_fsync call can proceed. */
	52	vm_map_t aio_map; /* user land map we have a reference to */
	53	user_ssize_t returnval; /* return value from read / write request */
	54	int errorval; /* error value from read / write request */
	55	int flags;
	56	long group_tag; /* identifier used to group IO requests */
	57	struct user_aiocb aiocb; /* copy of aiocb from user land */
	58	};
	59	typedef struct aio_workq_entry aio_workq_entry;
	60
	61	/*
	62	* definitions for aio_workq_entry.flags
	63	*/
	64	#define AIO_READ 0x00000001
	65	#define AIO_WRITE 0x00000002
	66	#define AIO_FSYNC 0x00000004 /* aio_fsync with op = O_SYNC */
	67	#define AIO_DSYNC 0x00000008 /* aio_fsync with op = O_DSYNC (not supported yet) */
	68	#define AIO_LIO 0x00000010 /* lio_listio generated IO */
	69	#define AIO_DO_FREE 0x00000800 /* entry needs to be freed */
	70	#define AIO_COMPLETION 0x00001000 /* entry is in completion processing (not freeable yet) */
	71	#define AIO_DISABLE 0x00002000 /* process is trying to exit or exec and we need */
	72	/* to disable normal completion notification */
	73	#define AIO_WAITING 0x00004000 /* process is trying to exit, exec, or close and is */
	74	/* waiting for one or more active IO requests to */
	75	/* complete */
	76
	77	/*
	78	* Prototypes
	79	*/
	80
	81	__private_extern__ void
	82	_aio_close(struct proc *p, int fd);
	83
	84	__private_extern__ void
	85	_aio_exit(struct proc *p);
	86
	87	__private_extern__ void
	88	_aio_exec(struct proc *p);
	89
	90	__private_extern__ void
	91	_aio_create_worker_threads(int num);
	92
	93	__private_extern__ void
	94	aio_init(void);
	95
	96	task_t
	97	get_aiotask(void);
	98
	99	#endif /* KERNEL */
	100
	101	#endif /* _SYS_AIO_KERN_H_ */