osfmk/kern/spl.c

   1 /*
   2  * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_OSREFERENCE_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
  10  * License may not be used to create, or enable the creation or
  11  * redistribution of, unlawful or unlicensed copies of an Apple operating
  12  * system, or to circumvent, violate, or enable the circumvention or
  13  * violation of, any terms of an Apple operating system software license
  14  * agreement.
  15  *
  16  * Please obtain a copy of the License at
  17  * http://www.opensource.apple.com/apsl/ and read it before using this
  18  * file.
  19  *
  20  * The Original Code and all software distributed under the License are
  21  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  22  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  23  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  24  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  25  * Please see the License for the specific language governing rights and
  26  * limitations under the License.
  27  *
  28  * @APPLE_LICENSE_OSREFERENCE_HEADER_END@
  29  */
  30 #include <kern/thread.h>
  31 #include <kern/lock.h>
  32 #include <kern/spl.h>
  33 #include <machine/machine_routines.h>
  34
  35 /*
  36  *  spl routines
  37  */
  38
  39 __private_extern__ spl_t
  40 splhigh(
  41         void)
  42 {
  43         return(ml_set_interrupts_enabled(FALSE));
  44 }
  45
  46 __private_extern__ spl_t
  47 splsched(
  48         void)
  49 {
  50         return(ml_set_interrupts_enabled(FALSE));
  51 }
  52
  53 __private_extern__ spl_t
  54 splclock(
  55         void)
  56 {
  57         return(ml_set_interrupts_enabled(FALSE));
  58 }
  59
  60 __private_extern__ void
  61 spllo(
  62         void)
  63 {
  64         (void)ml_set_interrupts_enabled(TRUE);
  65 }
  66
  67 __private_extern__ void
  68 splx(
  69         spl_t l)
  70 {
  71         ml_set_interrupts_enabled((boolean_t) l);
  72 }