1 files changed, 181 insertions, 0 deletions

diff --git a/include/linux/time.h b/include/linux/time.h
new file mode 100644
index 000000000000..5634497ff5df
--- /dev/null
+++ b/include/linux/time.h
@@ -0,0 +1,181 @@
+#ifndef _LINUX_TIME_H
+#define _LINUX_TIME_H
+
+#include <linux/types.h>
+
+#ifdef __KERNEL__
+#include <linux/seqlock.h>
+#endif
+
+#ifndef _STRUCT_TIMESPEC
+#define _STRUCT_TIMESPEC
+struct timespec {
+        time_t  tv_sec;         /* seconds */
+        long    tv_nsec;        /* nanoseconds */
+};
+#endif /* _STRUCT_TIMESPEC */
+
+struct timeval {
+        time_t          tv_sec;         /* seconds */
+        suseconds_t     tv_usec;        /* microseconds */
+};
+
+struct timezone {
+        int     tz_minuteswest; /* minutes west of Greenwich */
+        int     tz_dsttime;     /* type of dst correction */
+};
+
+#ifdef __KERNEL__
+
+/* Parameters used to convert the timespec values */
+#ifndef USEC_PER_SEC
+#define USEC_PER_SEC (1000000L)
+#endif
+
+#ifndef NSEC_PER_SEC
+#define NSEC_PER_SEC (1000000000L)
+#endif
+
+#ifndef NSEC_PER_USEC
+#define NSEC_PER_USEC (1000L)
+#endif
+
+static __inline__ int timespec_equal(struct timespec *a, struct timespec *b) 
+{ 
+        return (a->tv_sec == b->tv_sec) && (a->tv_nsec == b->tv_nsec);
+} 
+
+/* Converts Gregorian date to seconds since 1970-01-01 00:00:00.
+ * Assumes input in normal date format, i.e. 1980-12-31 23:59:59
+ * => year=1980, mon=12, day=31, hour=23, min=59, sec=59.
+ *
+ * [For the Julian calendar (which was used in Russia before 1917,
+ * Britain & colonies before 1752, anywhere else before 1582,
+ * and is still in use by some communities) leave out the
+ * -year/100+year/400 terms, and add 10.]
+ *
+ * This algorithm was first published by Gauss (I think).
+ *
+ * WARNING: this function will overflow on 2106-02-07 06:28:16 on
+ * machines were long is 32-bit! (However, as time_t is signed, we
+ * will already get problems at other places on 2038-01-19 03:14:08)
+ */
+static inline unsigned long
+mktime (unsigned int year, unsigned int mon,
+        unsigned int day, unsigned int hour,
+        unsigned int min, unsigned int sec)
+{
+        if (0 >= (int) (mon -= 2)) {    /* 1..12 -> 11,12,1..10 */
+                mon += 12;              /* Puts Feb last since it has leap day */
+                year -= 1;
+        }
+
+        return (((
+                (unsigned long) (year/4 - year/100 + year/400 + 367*mon/12 + day) +
+                        year*365 - 719499
+            )*24 + hour /* now have hours */
+          )*60 + min /* now have minutes */
+        )*60 + sec; /* finally seconds */
+}
+
+extern struct timespec xtime;
+extern struct timespec wall_to_monotonic;
+extern seqlock_t xtime_lock;
+
+static inline unsigned long get_seconds(void)
+{ 
+        return xtime.tv_sec;
+}
+
+struct timespec current_kernel_time(void);
+
+#define CURRENT_TIME (current_kernel_time())
+#define CURRENT_TIME_SEC ((struct timespec) { xtime.tv_sec, 0 })
+
+extern void do_gettimeofday(struct timeval *tv);
+extern int do_settimeofday(struct timespec *tv);
+extern int do_sys_settimeofday(struct timespec *tv, struct timezone *tz);
+extern void clock_was_set(void); // call when ever the clock is set
+extern int do_posix_clock_monotonic_gettime(struct timespec *tp);
+extern long do_nanosleep(struct timespec *t);
+extern long do_utimes(char __user * filename, struct timeval * times);
+struct itimerval;
+extern int do_setitimer(int which, struct itimerval *value, struct itimerval *ovalue);
+extern int do_getitimer(int which, struct itimerval *value);
+extern void getnstimeofday (struct timespec *tv);
+
+extern struct timespec timespec_trunc(struct timespec t, unsigned gran);
+
+static inline void
+set_normalized_timespec (struct timespec *ts, time_t sec, long nsec)
+{
+        while (nsec > NSEC_PER_SEC) {
+                nsec -= NSEC_PER_SEC;
+                ++sec;
+        }
+        while (nsec < 0) {
+                nsec += NSEC_PER_SEC;
+                --sec;
+        }
+        ts->tv_sec = sec;
+        ts->tv_nsec = nsec;
+}
+
+#endif /* __KERNEL__ */
+
+#define NFDBITS                 __NFDBITS
+
+#define FD_SETSIZE              __FD_SETSIZE
+#define FD_SET(fd,fdsetp)       __FD_SET(fd,fdsetp)
+#define FD_CLR(fd,fdsetp)       __FD_CLR(fd,fdsetp)
+#define FD_ISSET(fd,fdsetp)     __FD_ISSET(fd,fdsetp)
+#define FD_ZERO(fdsetp)         __FD_ZERO(fdsetp)
+
+/*
+ * Names of the interval timers, and structure
+ * defining a timer setting.
+ */
+#define ITIMER_REAL     0
+#define ITIMER_VIRTUAL  1
+#define ITIMER_PROF     2
+
+struct  itimerspec {
+        struct  timespec it_interval;    /* timer period */
+        struct  timespec it_value;       /* timer expiration */
+};
+
+struct  itimerval {
+        struct  timeval it_interval;    /* timer interval */
+        struct  timeval it_value;       /* current value */
+};
+
+
+/*
+ * The IDs of the various system clocks (for POSIX.1b interval timers).
+ */
+#define CLOCK_REALTIME            0
+#define CLOCK_MONOTONIC   1
+#define CLOCK_PROCESS_CPUTIME_ID 2
+#define CLOCK_THREAD_CPUTIME_ID  3
+#define CLOCK_REALTIME_HR        4
+#define CLOCK_MONOTONIC_HR        5
+
+/*
+ * The IDs of various hardware clocks
+ */
+
+
+#define CLOCK_SGI_CYCLE 10
+#define MAX_CLOCKS 16
+#define CLOCKS_MASK  (CLOCK_REALTIME | CLOCK_MONOTONIC | \
+                     CLOCK_REALTIME_HR | CLOCK_MONOTONIC_HR)
+#define CLOCKS_MONO (CLOCK_MONOTONIC & CLOCK_MONOTONIC_HR)
+
+/*
+ * The various flags for setting POSIX.1b interval timers.
+ */
+
+#define TIMER_ABSTIME 0x01
+
+
+#endif