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Commit	Line	Data
	1	/*
	2	* Copyright (c) 2003 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	* File: sys/aio_kern.h
	30	* Author: Jerry Cottingham [jerryc@apple.com]
	31	*
	32	* Header file for kernel only portion of POSIX Asynchronous IO APIs
	33	*
	34	*/
	35
	36	#include <sys/aio.h>
	37
	38	#ifndef _SYS_AIO_KERN_H_
	39	#define _SYS_AIO_KERN_H_
	40
	41	#ifdef KERNEL
	42
	43	struct aio_workq_entry
	44	{
	45	TAILQ_ENTRY( aio_workq_entry ) aio_workq_link;
	46	struct proc procp; / user proc that queued this request */
	47	user_addr_t uaiocbp; /* pointer passed in from user land */
	48	user_addr_t fsyncp; /* not NULL means this request must complete */
	49	/* before an aio_fsync call can proceed. */
	50	vm_map_t aio_map; /* user land map we have a reference to */
	51	user_ssize_t returnval; /* return value from read / write request */
	52	int errorval; /* error value from read / write request */
	53	int flags;
	54	long group_tag; /* identifier used to group IO requests */
	55	struct user_aiocb aiocb; /* copy of aiocb from user land */
	56	};
	57	typedef struct aio_workq_entry aio_workq_entry;
	58
	59	/*
	60	* definitions for aio_workq_entry.flags
	61	*/
	62	#define AIO_READ 0x00000001
	63	#define AIO_WRITE 0x00000002
	64	#define AIO_FSYNC 0x00000004 /* aio_fsync with op = O_SYNC */
	65	#define AIO_DSYNC 0x00000008 /* aio_fsync with op = O_DSYNC (not supported yet) */
	66	#define AIO_LIO 0x00000010 /* lio_listio generated IO */
	67	#define AIO_DO_FREE 0x00000800 /* entry needs to be freed */
	68	#define AIO_COMPLETION 0x00001000 /* entry is in completion processing (not freeable yet) */
	69	#define AIO_DISABLE 0x00002000 /* process is trying to exit or exec and we need */
	70	/* to disable normal completion notification */
	71	#define AIO_WAITING 0x00004000 /* process is trying to exit, exec, or close and is */
	72	/* waiting for one or more active IO requests to */
	73	/* complete */
	74
	75	/*
	76	* Prototypes
	77	*/
	78
	79	__private_extern__ void
	80	_aio_close(struct proc *p, int fd);
	81
	82	__private_extern__ void
	83	_aio_exit(struct proc *p);
	84
	85	__private_extern__ void
	86	_aio_exec(struct proc *p);
	87
	88	__private_extern__ void
	89	_aio_create_worker_threads(int num);
	90
	91	__private_extern__ void
	92	aio_init(void) __attribute__((section("__TEXT, initcode")));
	93
	94	task_t
	95	get_aiotask(void);
	96
	97	#endif /* KERNEL */
	98
	99	#endif /* _SYS_AIO_KERN_H_ */