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