libkern/libkern/OSBase.h

   1 /*
   2  * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_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. Please obtain a copy of the License at
  10  * http://www.opensource.apple.com/apsl/ and read it before using this
  11  * file.
  12  *
  13  * The Original Code and all software distributed under the License are
  14  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  15  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  16  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  18  * Please see the License for the specific language governing rights and
  19  * limitations under the License.
  20  *
  21  * @APPLE_LICENSE_HEADER_END@
  22  */
  23 /*
  24  * Copyright (c) 1999 Apple Computer, Inc.  All rights reserved.
  25  *
  26  * HISTORY
  27  *
  28  */
  29
  30 #ifndef _OS_OSBASE_H
  31 #define _OS_OSBASE_H
  32
  33 #include <sys/cdefs.h>
  34
  35 #include <libkern/OSTypes.h>
  36
  37 #include <stdint.h>
  38
  39 __BEGIN_DECLS
  40
  41 #ifdef  KERNEL_PRIVATE
  42
  43 OS_INLINE
  44 uint64_t
  45 __OSAbsoluteTime(
  46         AbsoluteTime    abstime)
  47 {
  48         return (*(uint64_t *)&abstime);
  49 }
  50
  51 OS_INLINE
  52 uint64_t *
  53 __OSAbsoluteTimePtr(
  54         AbsoluteTime    *abstime)
  55 {
  56         return ((uint64_t *)abstime);
  57 }
  58
  59 #define AbsoluteTime_to_scalar(x)       (*(uint64_t *)(x))
  60
  61 /* t1 < = > t2 */
  62 #define CMP_ABSOLUTETIME(t1, t2)                                \
  63         (AbsoluteTime_to_scalar(t1) >                           \
  64                 AbsoluteTime_to_scalar(t2)? (int)+1 :   \
  65          (AbsoluteTime_to_scalar(t1) <                          \
  66                 AbsoluteTime_to_scalar(t2)? (int)-1 : 0))
  67
  68 /* t1 += t2 */
  69 #define ADD_ABSOLUTETIME(t1, t2)                                \
  70         (AbsoluteTime_to_scalar(t1) +=                          \
  71                                 AbsoluteTime_to_scalar(t2))
  72
  73 /* t1 -= t2 */
  74 #define SUB_ABSOLUTETIME(t1, t2)                                \
  75         (AbsoluteTime_to_scalar(t1) -=                          \
  76                                 AbsoluteTime_to_scalar(t2))
  77
  78 #define ADD_ABSOLUTETIME_TICKS(t1, ticks)               \
  79         (AbsoluteTime_to_scalar(t1) +=                          \
  80                                                 (int32_t)(ticks))
  81
  82 #endif  /* KERNEL_PRIVATE */
  83
  84 __END_DECLS
  85
  86 #endif /* _OS_OSBASE_H */