+/*
+ * Copyright (c) 2003 Apple Computer, Inc. All rights reserved.
+ *
+ * @APPLE_LICENSE_HEADER_START@
+ *
+ * Copyright (c) 1999-2003 Apple Computer, Inc. All Rights Reserved.
+ *
+ * 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. 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_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;
+ struct proc *procp; /* user proc that queued this request */
+ struct aiocb *uaiocbp; /* pointer passed in from user land */
+ struct aiocb *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 */
+ 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 aiocb aiocb; /* copy of aiocb from user land */
+};
+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 */
+
+
+__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 );
+
+#endif /* KERNEL */
+
+#endif /* _SYS_AIO_KERN_H_ */
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