osfmk/kern/spl.c

   1 /*
   2  * Copyright (c) 2000 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 #include <kern/thread.h>
  29 #include <kern/lock.h>
  30 #include <kern/spl.h>
  31 #include <machine/machine_routines.h>
  32
  33 /*
  34  *  spl routines
  35  */
  36
  37 __private_extern__ spl_t
  38 splhigh(
  39         void)
  40 {
  41         return(ml_set_interrupts_enabled(FALSE));
  42 }
  43
  44 __private_extern__ spl_t
  45 splsched(
  46         void)
  47 {
  48         return(ml_set_interrupts_enabled(FALSE));
  49 }
  50
  51 __private_extern__ spl_t
  52 splclock(
  53         void)
  54 {
  55         return(ml_set_interrupts_enabled(FALSE));
  56 }
  57
  58 __private_extern__ void
  59 spllo(
  60         void)
  61 {
  62         (void)ml_set_interrupts_enabled(TRUE);
  63 }
  64
  65 __private_extern__ void
  66 splx(
  67         spl_t l)
  68 {
  69         ml_set_interrupts_enabled((boolean_t) l);
  70 }