sys-utils/hwclock.h

   1 #ifndef HWCLOCK_CLOCK_H
   2 #define HWCLOCK_CLOCK_H
   3
   4 #include <stdio.h>
   5 #include <stdlib.h>
   6 #include <string.h>
   7 #include <sys/time.h>
   8 #include <time.h>
   9
  10 #include "c.h"
  11 #include "debug.h"
  12
  13 #define HWCLOCK_DEBUG_INIT              (1 << 0)
  14 #define HWCLOCK_DEBUG_RANDOM_SLEEP      (1 << 1)
  15 #define HWCLOCK_DEBUG_DELTA_VS_TARGET   (1 << 2)
  16 #define HWCLOCK_DEBUG_ALL               0xFFFF
  17
  18 UL_DEBUG_DECLARE_MASK(hwclock);
  19 #define DBG(m, x)       __UL_DBG(hwclock, HWCLOCK_DEBUG_, m, x)
  20 #define ON_DBG(m, x)    __UL_DBG_CALL(hwclock, HWCLOCK_DEBUG_, m, x)
  21
  22 struct hwclock_control {
  23         char *date_opt;
  24         char *adj_file_name;
  25         double rtc_delay;       /* --delay <seconds> */
  26 #if defined(__linux__) && defined(__alpha__)
  27         char *epoch_option;
  28 #endif
  29 #ifdef __linux__
  30         char *rtc_dev_name;
  31 #endif
  32         unsigned int
  33                 hwaudit_on:1,
  34                 adjust:1,
  35                 show:1,
  36                 hctosys:1,
  37                 utc:1,
  38                 systohc:1,
  39 #if defined(__linux__) && defined(__alpha__)
  40                 getepoch:1,
  41                 setepoch:1,
  42 #endif
  43                 noadjfile:1,
  44                 local_opt:1,
  45                 directisa:1,
  46                 testing:1,
  47                 systz:1,
  48                 predict:1,
  49                 get:1,
  50                 set:1,
  51                 update:1,
  52                 universal:1,    /* will store hw_clock_is_utc() return value */
  53                 verbose:1;
  54 };
  55
  56 struct clock_ops {
  57         char *interface_name;
  58         int (*get_permissions) (void);
  59         int (*read_hardware_clock) (const struct hwclock_control *ctl, struct tm * tm);
  60         int (*set_hardware_clock) (const struct hwclock_control *ctl, const struct tm * tm);
  61         int (*synchronize_to_clock_tick) (const struct hwclock_control *ctl);
  62         const char *(*get_device_path) (void);
  63 };
  64
  65 extern struct clock_ops *probe_for_cmos_clock(void);
  66 extern struct clock_ops *probe_for_rtc_clock(const struct hwclock_control *ctl);
  67
  68 /* hwclock.c */
  69 extern double time_diff(struct timeval subtrahend, struct timeval subtractor);
  70
  71 /* rtc.c */
  72 #if defined(__linux__) && defined(__alpha__)
  73 extern int get_epoch_rtc(const struct hwclock_control *ctl, unsigned long *epoch);
  74 extern int set_epoch_rtc(const struct hwclock_control *ctl);
  75 #endif
  76
  77 extern void __attribute__((__noreturn__))
  78 hwclock_exit(const struct hwclock_control *ctl, int status);
  79
  80 #endif                          /* HWCLOCK_CLOCK_H */