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[/] [openrisc/] [trunk/] [gnu-old/] [newlib-1.17.0/] [newlib/] [libc/] [sys/] [linux/] [sys/] [linux_time.h] - Blame information for rev 816

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Line No. Rev Author Line
1 148 jeremybenn
#ifndef _LINUX_TIME_H
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#define _LINUX_TIME_H
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#include <asm/param.h>
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#include <sys/types.h>
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#ifndef _STRUCT_TIMESPEC
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#define _STRUCT_TIMESPEC
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struct timespec {
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        time_t  tv_sec;         /* seconds */
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        long    tv_nsec;        /* nanoseconds */
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};
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#endif /* _STRUCT_TIMESPEC */
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/*
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 * Change timeval to jiffies, trying to avoid the
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 * most obvious overflows..
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 *
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 * And some not so obvious.
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 *
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 * Note that we don't want to return MAX_LONG, because
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 * for various timeout reasons we often end up having
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 * to wait "jiffies+1" in order to guarantee that we wait
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 * at _least_ "jiffies" - so "jiffies+1" had better still
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 * be positive.
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 */
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#define MAX_JIFFY_OFFSET ((~0UL >> 1)-1)
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static __inline__ unsigned long
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timespec_to_jiffies(struct timespec *value)
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{
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        unsigned long sec = value->tv_sec;
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        long nsec = value->tv_nsec;
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        if (sec >= (MAX_JIFFY_OFFSET / HZ))
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                return MAX_JIFFY_OFFSET;
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        nsec += 1000000000L / HZ - 1;
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        nsec /= 1000000000L / HZ;
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        return HZ * sec + nsec;
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}
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static __inline__ void
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jiffies_to_timespec(unsigned long jiffies, struct timespec *value)
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{
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        value->tv_nsec = (jiffies % HZ) * (1000000000L / HZ);
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        value->tv_sec = jiffies / HZ;
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}
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#ifndef _STRUCT_TIMEVAL
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#define _STRUCT_TIMEVAL
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struct timeval {
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        time_t          tv_sec;         /* seconds */
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        suseconds_t     tv_usec;        /* microseconds */
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};
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#endif
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struct timezone {
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        int     tz_minuteswest; /* minutes west of Greenwich */
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        int     tz_dsttime;     /* type of dst correction */
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};
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#define ITIMER_REAL     0
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#define ITIMER_VIRTUAL  1
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#define ITIMER_PROF     2
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struct  itimerspec {
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        struct  timespec it_interval;    /* timer period */
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        struct  timespec it_value;       /* timer expiration */
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};
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struct  itimerval {
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        struct  timeval it_interval;    /* timer interval */
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        struct  timeval it_value;       /* current value */
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};
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#endif

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