osfmk/kern/clock.h

   1 /*
   2  * Copyright (c) 2000-2008 Apple 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  * @OSF_COPYRIGHT@
  30  */
  31 /*
  32  */
  33
  34 #ifndef _KERN_CLOCK_H_
  35 #define _KERN_CLOCK_H_
  36
  37 #include <stdint.h>
  38 #include <mach/mach_types.h>
  39 #include <mach/clock_types.h>
  40 #include <mach/message.h>
  41 #include <mach/mach_time.h>
  42
  43 #include <kern/kern_types.h>
  44
  45 #include <sys/cdefs.h>
  46
  47 #ifdef  __LP64__
  48
  49 typedef unsigned long           clock_sec_t;
  50 typedef unsigned int            clock_usec_t, clock_nsec_t;
  51
  52 #else   /* __LP64__ */
  53
  54 typedef uint32_t                        clock_sec_t;
  55 typedef uint32_t                        clock_usec_t, clock_nsec_t;
  56
  57 #endif  /* __LP64__ */
  58
  59 #ifdef  MACH_KERNEL_PRIVATE
  60
  61 #include <kern/queue.h>
  62
  63 /*
  64  * Clock operations list structure. Contains vectors to machine
  65  * dependent clock routines.
  66  */
  67 struct  clock_ops {
  68         int             (*c_config)(void);              /* configuration */
  69
  70         int             (*c_init)(void);                /* initialize */
  71
  72         kern_return_t   (*c_gettime)(   /* get time */
  73                                 mach_timespec_t                 *cur_time);
  74
  75         kern_return_t   (*c_getattr)(   /* get attributes */
  76                                 clock_flavor_t                  flavor,
  77                                 clock_attr_t                    attr,
  78                                 mach_msg_type_number_t  *count);
  79 };
  80 typedef struct clock_ops        *clock_ops_t;
  81 typedef struct clock_ops        clock_ops_data_t;
  82
  83 /*
  84  * Actual clock object data structure. Contains the machine
  85  * dependent operations list and clock operation ports.
  86  */
  87 struct  clock {
  88         clock_ops_t                     cl_ops;                 /* operations list */
  89         struct ipc_port         *cl_service;    /* service port */
  90         struct ipc_port         *cl_control;    /* control port */
  91 };
  92 typedef struct clock            clock_data_t;
  93
  94 /*
  95  * Configure the clock system.
  96  */
  97 extern void             clock_config(void);
  98 extern void             clock_oldconfig(void);
  99
 100 /*
 101  * Initialize the clock system.
 102  */
 103 extern void             clock_init(void);
 104 extern void             clock_oldinit(void);
 105
 106 extern void             clock_timebase_init(void);
 107
 108 /*
 109  * Initialize the clock ipc service facility.
 110  */
 111 extern void             clock_service_create(void);
 112
 113 extern void                     clock_gettimeofday_set_commpage(
 114                                                 uint64_t                                abstime,
 115                                                 uint64_t                                epoch,
 116                                                 uint64_t                                offset,
 117                                                 clock_sec_t                             *secs,
 118                                                 clock_usec_t                    *microsecs);
 119
 120 extern void                     machine_delay_until(uint64_t interval,
 121                                                 uint64_t                deadline);
 122
 123 extern uint32_t         hz_tick_interval;
 124
 125 extern void             absolutetime_to_nanotime(
 126                                         uint64_t                abstime,
 127                                         clock_sec_t             *secs,
 128                                         clock_nsec_t    *nanosecs);
 129
 130 extern void             nanotime_to_absolutetime(
 131                                         clock_sec_t             secs,
 132                                         clock_nsec_t    nanosecs,
 133                                         uint64_t                *result);
 134
 135 #endif /* MACH_KERNEL_PRIVATE */
 136
 137 __BEGIN_DECLS
 138
 139 #ifdef  XNU_KERNEL_PRIVATE
 140
 141 extern void                     clock_adjtime(
 142                                                 long            *secs,
 143                                                 int                     *microsecs);
 144
 145 extern void                     clock_initialize_calendar(void);
 146
 147 extern void                     clock_wakeup_calendar(void);
 148
 149 extern void                     clock_gettimeofday(
 150                                                 clock_sec_t                     *secs,
 151                                                 clock_usec_t            *microsecs);
 152
 153 extern void                     clock_set_calendar_microtime(
 154                                                 clock_sec_t                     secs,
 155                                                 clock_usec_t            microsecs);
 156
 157 extern void                     clock_get_boottime_nanotime(
 158                                                 clock_sec_t                     *secs,
 159                                                 clock_nsec_t            *nanosecs);
 160
 161 extern void                     absolutetime_to_microtime(
 162                                                 uint64_t                        abstime,
 163                                                 clock_sec_t                     *secs,
 164                                                 clock_usec_t            *microsecs);
 165
 166 extern void                     clock_deadline_for_periodic_event(
 167                                                 uint64_t                        interval,
 168                                                 uint64_t                        abstime,
 169                                                 uint64_t                        *deadline);
 170
 171 #if     CONFIG_DTRACE
 172
 173 extern void                     clock_get_calendar_nanotime_nowait(
 174                                                 clock_sec_t                     *secs,
 175                                                 clock_nsec_t            *nanosecs);
 176
 177 #endif  /* CONFIG_DTRACE */
 178
 179 #endif  /* XNU_KERNEL_PRIVATE */
 180
 181 extern void                     clock_get_calendar_microtime(
 182                                                 clock_sec_t                     *secs,
 183                                                 clock_usec_t            *microsecs);
 184
 185 extern void                     clock_get_calendar_absolute_and_microtime(
 186                                                 clock_sec_t                     *secs,
 187                                                 clock_usec_t            *microsecs,
 188                                                 uint64_t                *abstime);
 189
 190 extern void                     clock_get_calendar_nanotime(
 191                                                 clock_sec_t                     *secs,
 192                                                 clock_nsec_t            *nanosecs);
 193
 194 extern void                     clock_get_system_microtime(
 195                                                 clock_sec_t                     *secs,
 196                                                 clock_usec_t            *microsecs);
 197
 198 extern void                     clock_get_system_nanotime(
 199                                                 clock_sec_t                     *secs,
 200                                                 clock_nsec_t            *nanosecs);
 201
 202 extern void                             clock_timebase_info(
 203                                                         mach_timebase_info_t    info);
 204
 205 extern void                             clock_get_uptime(
 206                                                         uint64_t                *result);
 207
 208 extern void                             clock_interval_to_deadline(
 209                                                         uint32_t                interval,
 210                                                         uint32_t                scale_factor,
 211                                                         uint64_t                *result);
 212
 213 extern void                             clock_interval_to_absolutetime_interval(
 214                                                         uint32_t                interval,
 215                                                         uint32_t                scale_factor,
 216                                                         uint64_t                *result);
 217
 218 extern void                             clock_absolutetime_interval_to_deadline(
 219                                                         uint64_t                abstime,
 220                                                         uint64_t                *result);
 221
 222 extern void                             clock_delay_until(
 223                                                         uint64_t                deadline);
 224
 225 extern void                             absolutetime_to_nanoseconds(
 226                                                         uint64_t                abstime,
 227                                                         uint64_t                *result);
 228
 229 extern void             nanoseconds_to_absolutetime(
 230                                                         uint64_t                nanoseconds,
 231                                                         uint64_t                *result);
 232
 233 #ifdef  KERNEL_PRIVATE
 234
 235 /*
 236  * Obsolete interfaces.
 237  */
 238
 239 #ifndef __LP64__
 240
 241 #define MACH_TIMESPEC_SEC_MAX           (0 - 1)
 242 #define MACH_TIMESPEC_NSEC_MAX          (NSEC_PER_SEC - 1)
 243
 244 #define MACH_TIMESPEC_MAX       ((mach_timespec_t) {                            \
 245                                                                         MACH_TIMESPEC_SEC_MAX,          \
 246                                                                         MACH_TIMESPEC_NSEC_MAX } )
 247 #define MACH_TIMESPEC_ZERO      ((mach_timespec_t) { 0, 0 } )
 248
 249 #define ADD_MACH_TIMESPEC_NSEC(t1, nsec)                \
 250   do {                                                                                  \
 251         (t1)->tv_nsec += (clock_res_t)(nsec);           \
 252         if ((clock_res_t)(nsec) > 0 &&                          \
 253                         (t1)->tv_nsec >= NSEC_PER_SEC) {        \
 254                 (t1)->tv_nsec -= NSEC_PER_SEC;                  \
 255                 (t1)->tv_sec += 1;                                              \
 256         }                                                                                       \
 257         else if ((clock_res_t)(nsec) < 0 &&                     \
 258                                  (t1)->tv_nsec < 0) {                   \
 259                 (t1)->tv_nsec += NSEC_PER_SEC;                  \
 260                 (t1)->tv_sec -= 1;                                              \
 261         }                                                                                       \
 262   } while (0)
 263
 264 #include <Availability.h>
 265
 266 /* Use mach_absolute_time() */
 267 extern mach_timespec_t  clock_get_system_value(void) __OSX_AVAILABLE_BUT_DEPRECATED(__MAC_10_0, __MAC_10_8, __IPHONE_2_0, __IPHONE_6_0);
 268
 269 extern mach_timespec_t  clock_get_calendar_value(void) __OSX_AVAILABLE_BUT_DEPRECATED(__MAC_10_0, __MAC_10_8, __IPHONE_2_0, __IPHONE_6_0);
 270
 271 #else   /* __LP64__ */
 272
 273 #ifdef  XNU_KERNEL_PRIVATE
 274
 275 #define MACH_TIMESPEC_ZERO      ((mach_timespec_t) { 0, 0 } )
 276
 277 #endif  /* XNU_KERNEL_PRIVATE */
 278
 279 #endif  /* __LP64__ */
 280
 281 extern void                             delay_for_interval(
 282                                                         uint32_t                interval,
 283                                                         uint32_t                scale_factor);
 284
 285 #endif  /* KERNEL_PRIVATE */
 286
 287 __END_DECLS
 288
 289 #endif  /* _KERN_CLOCK_H_ */