sys-utils/hwclock.h

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