71 lines
2.5 KiB
C
71 lines
2.5 KiB
C
/*
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* Copyright (c) 2004, 2008
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* The President and Fellows of Harvard College.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE UNIVERSITY AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE UNIVERSITY OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#ifndef _KERN_TIME_H_
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#define _KERN_TIME_H_
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/*
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* Time-related definitions, for <sys/time.h> and others.
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*/
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/*
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* Time with fractional seconds. Important. Unfortunately, to be
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* compatible, we need both timeval and timespec.
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*/
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struct timeval {
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__time_t tv_sec; /* seconds */
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__i32 tv_usec; /* microseconds */
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};
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struct timespec {
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__time_t tv_sec; /* seconds */
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__i32 tv_nsec; /* nanoseconds */
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};
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/*
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* Bits for interval timers. Obscure and not really that important.
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*/
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/* codes for the various timers */
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#define ITIMER_REAL 0 /* Real (wall-clock) time. */
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#define ITIMER_VIRTUAL 1 /* Virtual (when process is executing) time. */
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#define ITIMER_PROF 2 /* For execution profiling. */
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/* structure for setitimer/getitimer */
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struct itimerval {
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struct timeval it_interval; /* Time to reload after expiry. */
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struct timeval it_value; /* Time to count. */
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};
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#endif /* _KERN_TIME_H_ */
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