libkern/libkern/OSBase.h

   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 /*
  31  * Copyright (c) 1999 Apple Computer, Inc.  All rights reserved.
  32  *
  33  * HISTORY
  34  *
  35  */
  36
  37 #ifndef _OS_OSBASE_H
  38 #define _OS_OSBASE_H
  39
  40 #include <sys/cdefs.h>
  41
  42 #include <libkern/OSTypes.h>
  43
  44 #include <stdint.h>
  45
  46 __BEGIN_DECLS
  47
  48 #ifdef  KERNEL_PRIVATE
  49
  50 OS_INLINE
  51 uint64_t
  52 __OSAbsoluteTime(
  53         AbsoluteTime    abstime)
  54 {
  55         return (*(uint64_t *)&abstime);
  56 }
  57
  58 OS_INLINE
  59 uint64_t *
  60 __OSAbsoluteTimePtr(
  61         AbsoluteTime    *abstime)
  62 {
  63         return ((uint64_t *)abstime);
  64 }
  65
  66 #define AbsoluteTime_to_scalar(x)       (*(uint64_t *)(x))
  67
  68 /* t1 < = > t2 */
  69 #define CMP_ABSOLUTETIME(t1, t2)                                \
  70         (AbsoluteTime_to_scalar(t1) >                           \
  71                 AbsoluteTime_to_scalar(t2)? (int)+1 :   \
  72          (AbsoluteTime_to_scalar(t1) <                          \
  73                 AbsoluteTime_to_scalar(t2)? (int)-1 : 0))
  74
  75 /* t1 += t2 */
  76 #define ADD_ABSOLUTETIME(t1, t2)                                \
  77         (AbsoluteTime_to_scalar(t1) +=                          \
  78                                 AbsoluteTime_to_scalar(t2))
  79
  80 /* t1 -= t2 */
  81 #define SUB_ABSOLUTETIME(t1, t2)                                \
  82         (AbsoluteTime_to_scalar(t1) -=                          \
  83                                 AbsoluteTime_to_scalar(t2))
  84
  85 #define ADD_ABSOLUTETIME_TICKS(t1, ticks)               \
  86         (AbsoluteTime_to_scalar(t1) +=                          \
  87                                                 (int32_t)(ticks))
  88
  89 #endif  /* KERNEL_PRIVATE */
  90
  91 __END_DECLS
  92
  93 #endif /* _OS_OSBASE_H */