/* * Copyright (c) 2003 Apple Computer, Inc. All rights reserved. * * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ * * This file contains Original Code and/or Modifications of Original Code * as defined in and that are subject to the Apple Public Source License * Version 2.0 (the 'License'). You may not use this file except in * compliance with the License. The rights granted to you under the License * may not be used to create, or enable the creation or redistribution of, * unlawful or unlicensed copies of an Apple operating system, or to * circumvent, violate, or enable the circumvention or violation of, any * terms of an Apple operating system software license agreement. * * Please obtain a copy of the License at * http://www.opensource.apple.com/apsl/ and read it before using this file. * * The Original Code and all software distributed under the License are * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. * Please see the License for the specific language governing rights and * limitations under the License. * * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ */ /* * File: sys/aio_kern.h * Author: Jerry Cottingham [jerryc@apple.com] * * Header file for kernel only portion of POSIX Asynchronous IO APIs * */ #include <sys/aio.h> #ifndef _SYS_AIO_KERN_H_ #define _SYS_AIO_KERN_H_ #ifdef KERNEL struct aio_workq_entry { TAILQ_ENTRY( aio_workq_entry ) aio_workq_link; /* Protected by queue lock */ TAILQ_ENTRY( aio_workq_entry ) aio_proc_link; /* Proteced by proc's aio lock */ /* Proc lock */ void *group_tag; /* identifier used to group IO requests */ /* Initialized and never changed, safe to access */ struct proc *procp; /* user proc that queued this request */ user_addr_t uaiocbp; /* pointer passed in from user land */ struct user_aiocb aiocb; /* copy of aiocb from user land */ vm_map_t aio_map; /* user land map we have a reference to */ thread_t thread; /* thread that queued this request */ /* Entry lock */ int aio_refcount; user_ssize_t returnval; /* return value from read / write request */ int errorval; /* error value from read / write request */ int flags; }; typedef struct aio_workq_entry aio_workq_entry; /* * definitions for aio_workq_entry.flags */ #define AIO_READ 0x00000001 /* a read */ #define AIO_WRITE 0x00000002 /* a write */ #define AIO_FSYNC 0x00000004 /* aio_fsync with op = O_SYNC */ #define AIO_DSYNC 0x00000008 /* aio_fsync with op = O_DSYNC (not supported yet) */ #define AIO_LIO 0x00000010 /* lio_listio generated IO */ #define AIO_DO_FREE 0x00000800 /* entry should be freed when last reference is dropped. */ /* set by aio_return() and _aio_exit() */ #define AIO_DISABLE 0x00002000 /* process is trying to exit or exec and we need */ /* to not try to send a signal from do_aio_completion() */ #define AIO_CLOSE_WAIT 0x00004000 /* process is trying to close and is */ /* waiting for one or more active IO requests to */ /* complete */ #define AIO_EXIT_WAIT 0x00008000 /* process is trying to exit or exec and is */ /* waiting for one or more active IO requests to */ /* complete */ #define AIO_LIO_NOTIFY 0x00010000 /* wait for list complete */ /* * Prototypes */ __private_extern__ void _aio_close(struct proc *p, int fd); __private_extern__ void _aio_exit(struct proc *p); __private_extern__ void _aio_exec(struct proc *p); __private_extern__ void _aio_create_worker_threads(int num); __private_extern__ void aio_init(void); task_t get_aiotask(void); #endif /* KERNEL */ #endif /* _SYS_AIO_KERN_H_ */