libkern/libkern/OSBase.h

   1 /*
   2  * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_OSREFERENCE_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. The rights granted to you under the License
  10  * may not be used to create, or enable the creation or redistribution of,
  11  * unlawful or unlicensed copies of an Apple operating system, or to
  12  * circumvent, violate, or enable the circumvention or violation of, any
  13  * terms of an Apple operating system software license agreement.
  14  *
  15  * Please obtain a copy of the License at
  16  * http://www.opensource.apple.com/apsl/ and read it before using this file.
  17  *
  18  * The Original Code and all software distributed under the License are
  19  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  20  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  21  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  22  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  23  * Please see the License for the specific language governing rights and
  24  * limitations under the License.
  25  *
  26  * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
  27  */
  28 /*
  29  * Copyright (c) 1999 Apple Computer, Inc.  All rights reserved.
  30  *
  31  * HISTORY
  32  *
  33  */
  34
  35 #ifndef _OS_OSBASE_H
  36 #define _OS_OSBASE_H
  37
  38 #include <sys/cdefs.h>
  39
  40 #include <libkern/OSTypes.h>
  41
  42 #include <stdint.h>
  43
  44 __BEGIN_DECLS
  45
  46 #ifdef  KERNEL_PRIVATE
  47
  48 OS_INLINE
  49 uint64_t
  50 __OSAbsoluteTime(
  51         AbsoluteTime    abstime)
  52 {
  53         return (*(uint64_t *)&abstime);
  54 }
  55
  56 OS_INLINE
  57 uint64_t *
  58 __OSAbsoluteTimePtr(
  59         AbsoluteTime    *abstime)
  60 {
  61         return ((uint64_t *)abstime);
  62 }
  63
  64 #define AbsoluteTime_to_scalar(x)       (*(uint64_t *)(x))
  65
  66 /* t1 < = > t2 */
  67 #define CMP_ABSOLUTETIME(t1, t2)                                \
  68         (AbsoluteTime_to_scalar(t1) >                           \
  69                 AbsoluteTime_to_scalar(t2)? (int)+1 :   \
  70          (AbsoluteTime_to_scalar(t1) <                          \
  71                 AbsoluteTime_to_scalar(t2)? (int)-1 : 0))
  72
  73 /* t1 += t2 */
  74 #define ADD_ABSOLUTETIME(t1, t2)                                \
  75         (AbsoluteTime_to_scalar(t1) +=                          \
  76                                 AbsoluteTime_to_scalar(t2))
  77
  78 /* t1 -= t2 */
  79 #define SUB_ABSOLUTETIME(t1, t2)                                \
  80         (AbsoluteTime_to_scalar(t1) -=                          \
  81                                 AbsoluteTime_to_scalar(t2))
  82
  83 #define ADD_ABSOLUTETIME_TICKS(t1, ticks)               \
  84         (AbsoluteTime_to_scalar(t1) +=                          \
  85                                                 (int32_t)(ticks))
  86
  87 #endif  /* KERNEL_PRIVATE */
  88
  89 __END_DECLS
  90
  91 #endif /* _OS_OSBASE_H */