X-Git-Url: https://git.saurik.com/apple/xnu.git/blobdiff_plain/2d21ac55c334faf3a56e5634905ed6987fc787d4..bca245acd4c03fd752d1a45f011ad495e60fe53d:/bsd/sys/aio_kern.h diff --git a/bsd/sys/aio_kern.h b/bsd/sys/aio_kern.h index 33ae502c9..8412a2c48 100644 --- a/bsd/sys/aio_kern.h +++ b/bsd/sys/aio_kern.h @@ -2,7 +2,7 @@ * 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 @@ -11,10 +11,10 @@ * 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, @@ -22,76 +22,87 @@ * 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 #ifndef _SYS_AIO_KERN_H_ -#define _SYS_AIO_KERN_H_ +#define _SYS_AIO_KERN_H_ #ifdef KERNEL -struct aio_workq_entry -{ - TAILQ_ENTRY( aio_workq_entry ) aio_workq_link; - struct proc *procp; /* user proc that queued this request */ - user_addr_t uaiocbp; /* pointer passed in from user land */ - user_addr_t fsyncp; /* not NULL means this request must complete */ - /* before an aio_fsync call can proceed. */ - vm_map_t aio_map; /* user land map we have a reference to */ - user_ssize_t returnval; /* return value from read / write request */ - int errorval; /* error value from read / write request */ - int flags; - long group_tag; /* identifier used to group IO requests */ - struct user_aiocb aiocb; /* copy of aiocb from user land */ +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 -#define AIO_WRITE 0x00000002 -#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 needs to be freed */ -#define AIO_COMPLETION 0x00001000 /* entry is in completion processing (not freeable yet) */ -#define AIO_DISABLE 0x00002000 /* process is trying to exit or exec and we need */ - /* to disable normal completion notification */ -#define AIO_WAITING 0x00004000 /* process is trying to exit, exec, or close and is */ - /* waiting for one or more active IO requests to */ - /* complete */ +#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 +__private_extern__ void _aio_close(struct proc *p, int fd); -__private_extern__ void +__private_extern__ void _aio_exit(struct proc *p); -__private_extern__ void +__private_extern__ void _aio_exec(struct proc *p); -__private_extern__ void +__private_extern__ void _aio_create_worker_threads(int num); -__private_extern__ void -aio_init(void) __attribute__((section("__TEXT, initcode"))); +__private_extern__ void +aio_init(void); -task_t +task_t get_aiotask(void); #endif /* KERNEL */