libkern/libkern/OSBase.h

   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 /*
  23  * Copyright (c) 1999 Apple Computer, Inc.  All rights reserved.
  24  *
  25  * HISTORY
  26  *
  27  */
  28
  29 #ifndef _OS_OSBASE_H
  30 #define _OS_OSBASE_H
  31
  32 #include <sys/cdefs.h>
  33
  34 #include <libkern/OSTypes.h>
  35
  36 #include <stdint.h>
  37
  38 __BEGIN_DECLS
  39
  40 #ifdef  KERNEL_PRIVATE
  41
  42 OS_INLINE
  43 uint64_t
  44 __OSAbsoluteTime(
  45         AbsoluteTime    abstime)
  46 {
  47         return (*(uint64_t *)&abstime);
  48 }
  49
  50 OS_INLINE
  51 uint64_t *
  52 __OSAbsoluteTimePtr(
  53         AbsoluteTime    *abstime)
  54 {
  55         return ((uint64_t *)abstime);
  56 }
  57
  58 #define AbsoluteTime_to_scalar(x)       (*(uint64_t *)(x))
  59
  60 /* t1 < = > t2 */
  61 #define CMP_ABSOLUTETIME(t1, t2)                                \
  62         (AbsoluteTime_to_scalar(t1) >                           \
  63                 AbsoluteTime_to_scalar(t2)? (int)+1 :   \
  64          (AbsoluteTime_to_scalar(t1) <                          \
  65                 AbsoluteTime_to_scalar(t2)? (int)-1 : 0))
  66
  67 /* t1 += t2 */
  68 #define ADD_ABSOLUTETIME(t1, t2)                                \
  69         (AbsoluteTime_to_scalar(t1) +=                          \
  70                                 AbsoluteTime_to_scalar(t2))
  71
  72 /* t1 -= t2 */
  73 #define SUB_ABSOLUTETIME(t1, t2)                                \
  74         (AbsoluteTime_to_scalar(t1) -=                          \
  75                                 AbsoluteTime_to_scalar(t2))
  76
  77 #define ADD_ABSOLUTETIME_TICKS(t1, ticks)               \
  78         (AbsoluteTime_to_scalar(t1) +=                          \
  79                                                 (int32_t)(ticks))
  80
  81 #endif  /* KERNEL_PRIVATE */
  82
  83 __END_DECLS
  84
  85 #endif /* _OS_OSBASE_H */