1  /*
  2   * Copyright (c) 2000-2019 Apple 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  /* Copyright (c) 1995 NeXT Computer, Inc. All Rights Reserved */
 29  /*-
 30   * Copyright (c) 1990, 1993
 31   *	The Regents of the University of California.  All rights reserved.
 32   * (c) UNIX System Laboratories, Inc.
 33   * All or some portions of this file are derived from material licensed
 34   * to the University of California by American Telephone and Telegraph
 35   * Co. or Unix System Laboratories, Inc. and are reproduced herein with
 36   * the permission of UNIX System Laboratories, Inc.
 37   *
 38   * Redistribution and use in source and binary forms, with or without
 39   * modification, are permitted provided that the following conditions
 40   * are met:
 41   * 1. Redistributions of source code must retain the above copyright
 42   *    notice, this list of conditions and the following disclaimer.
 43   * 2. Redistributions in binary form must reproduce the above copyright
 44   *    notice, this list of conditions and the following disclaimer in the
 45   *    documentation and/or other materials provided with the distribution.
 46   * 3. All advertising materials mentioning features or use of this software
 47   *    must display the following acknowledgement:
 48   *	This product includes software developed by the University of
 49   *	California, Berkeley and its contributors.
 50   * 4. Neither the name of the University nor the names of its contributors
 51   *    may be used to endorse or promote products derived from this software
 52   *    without specific prior written permission.
 53   *
 54   * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 55   * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 56   * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 57   * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 58   * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 59   * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 60   * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 61   * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 62   * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 63   * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 64   * SUCH DAMAGE.
 65   *
 66   *	@(#)kernel.h	8.3 (Berkeley) 1/21/94
 67   */
 68  #ifndef _SYS_KERNEL_H_
 69  #define _SYS_KERNEL_H_
 70  
 71  #include <sys/appleapiopts.h>
 72  
 73  #ifdef  KERNEL
 74  
 75  #include <sys/param.h>
 76  
 77  #ifdef BSD_KERNEL_PRIVATE
 78  #include <stdbool.h>
 79  #include <kern/locks.h>
 80  
 81  /* Global variables for the kernel. */
 82  
 83  /* 1.1 */
 84  extern long hostid;
 85  extern char hostname[MAXHOSTNAMELEN];
 86  extern lck_mtx_t hostname_lock;
 87  extern char domainname[MAXHOSTNAMELEN];
 88  extern lck_mtx_t domainname_lock;
 89  
 90  /* 1.2 */
 91  extern int stathz;              /* statistics clock's frequency */
 92  extern int profhz;              /* profiling clock's frequency */
 93  
 94  extern bool send_sigsys;
 95  #endif /* BSD_KERNEL_PRIVATE */
 96  
 97  
 98  #ifdef KERNEL_PRIVATE
 99  extern struct timezone tz;                      /* XXX */
100  
101  extern int tick;                /* usec per tick (1000000 / hz) */
102  extern int hz;                  /* system clock's frequency */
103  
104  #endif /* KERNEL_PRIVATE */
105  
106  #endif  /* KERNEL */
107  
108  #endif  /* !_SYS_KERNEL_H_ */