osfmk/kern/spl.c

   1 /*
   2  * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * The contents of this file constitute Original Code as defined in and
   7  * are subject to the Apple Public Source License Version 1.1 (the
   8  * "License").  You may not use this file except in compliance with the
   9  * License.  Please obtain a copy of the License at
  10  * http://www.apple.com/publicsource and read it before using this file.
  11  *
  12  * This Original Code and all software distributed under the License are
  13  * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  14  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  15  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  16  * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
  17  * License for the specific language governing rights and limitations
  18  * under the License.
  19  *
  20  * @APPLE_LICENSE_HEADER_END@
  21  */
  22 #include <kern/thread.h>
  23 #include <kern/lock.h>
  24 #include <kern/spl.h>
  25 #include <machine/machine_routines.h>
  26
  27 /*
  28  *  spl routines
  29  */
  30
  31 __private_extern__ spl_t
  32 splhigh(
  33         void)
  34 {
  35         return(ml_set_interrupts_enabled(FALSE));
  36 }
  37
  38 __private_extern__ spl_t
  39 splsched(
  40         void)
  41 {
  42         return(ml_set_interrupts_enabled(FALSE));
  43 }
  44
  45 __private_extern__ spl_t
  46 splclock(
  47         void)
  48 {
  49         return(ml_set_interrupts_enabled(FALSE));
  50 }
  51
  52 __private_extern__ void
  53 spllo(
  54         void)
  55 {
  56         (void)ml_set_interrupts_enabled(TRUE);
  57 }
  58
  59 __private_extern__ void
  60 splx(
  61         spl_t l)
  62 {
  63         ml_set_interrupts_enabled((boolean_t) l);
  64 }