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 43struct 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}; 57typedef 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 92aio_init(void) __attribute__((section("__TEXT, initcode"))); 93 94task_t 95get_aiotask(void); 96 97#endif /* KERNEL */ 98 99#endif /* _SYS_AIO_KERN_H_ */ 100