/usr/include/rx/rx_clock.h is in libopenafs-dev 1.8.0~pre5-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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* Copyright 2000, International Business Machines Corporation and others.
* All Rights Reserved.
*
* This software has been released under the terms of the IBM Public
* License. For details, see the LICENSE file in the top-level source
* directory or online at http://www.openafs.org/dl/license10.html
*/
/* Elapsed time package */
/* This package maintains a clock which is independent of the time of day. It uses the 4.3BSD interval timer (getitimer/setitimer) in TIMER_REAL mode. Any other use of the timer voids this package's warranty. */
#ifndef _CLOCK_
#define _CLOCK_
#ifdef KERNEL
#if defined(AFS_AIX_ENV) || defined(AFS_AUX_ENV) || defined(AFS_SUN5_ENV)
#include "h/systm.h"
#include "h/time.h"
#endif /* System V */
#else /* KERNEL */
#ifndef AFS_NT40_ENV
#ifndef ITIMER_REAL
#include <sys/time.h>
#endif /* ITIMER_REAL */
#else
#include <time.h>
#include <afs/afsutil.h>
#endif
#endif /* KERNEL */
/* Some macros to make macros more reasonable (this allows a block to be used within a macro which does not cause if statements to screw up). That is, you can use "if (...) macro_name(); else ...;" without having things blow up on the semi-colon. */
#ifndef BEGIN
#define BEGIN do {
#define END } while(0)
#endif
/* A clock value is the number of seconds and microseconds that have elapsed since calling clock_Init. */
struct clock {
afs_int32 sec; /* Seconds since clock_Init */
afs_int32 usec; /* Microseconds since clock_Init */
};
#if defined(KERNEL)
#include "afs/afs_osi.h"
#endif
#if !defined(KERNEL) || defined(UKERNEL)
#if defined(AFS_USE_GETTIMEOFDAY) || defined(AFS_PTHREAD_ENV) || defined(UKERNEL)
#define clock_Init()
#define clock_NewTime()
#define clock_UpdateTime()
#define clock_Sec() (time(NULL))
#define clock_haveCurrentTime 1
#define clock_GetTime(cv) \
BEGIN \
struct timeval tv; \
gettimeofday(&tv, NULL); \
(cv)->sec = (afs_int32)tv.tv_sec; \
(cv)->usec = (afs_int32)tv.tv_usec; \
END
#else /* AFS_USE_GETTIMEOFDAY || AFS_PTHREAD_ENV */
/* For internal use. The last value returned from clock_GetTime() */
extern struct clock clock_now;
/* For internal use: this flag, if set, indicates a new time should be read by clock_getTime() */
extern int clock_haveCurrentTime;
/* For external use: the number of times the clock value is actually updated */
extern int clock_nUpdates;
/* Initialize the clock package */
#define clock_NewTime() (clock_haveCurrentTime = 0)
/* Return the current clock time. If the clock value has not been updated since the last call to clock_NewTime, it is updated now */
#define clock_GetTime(cv) \
BEGIN \
if (!clock_haveCurrentTime) clock_UpdateTime(); \
(cv)->sec = clock_now.sec; \
(cv)->usec = clock_now.usec; \
END
/* Current clock time, truncated to seconds */
#define clock_Sec() ((!clock_haveCurrentTime)? clock_UpdateTime(), clock_now.sec:clock_now.sec)
extern void clock_Init(void);
extern int clock_UnInit(void);
extern void clock_UpdateTime(void);
#endif /* AFS_USE_GETTIMEOFDAY || AFS_PTHREAD_ENV */
#else /* KERNEL */
#define clock_Init()
#if defined(AFS_SGI61_ENV) || defined(AFS_HPUX_ENV) || defined(AFS_LINUX_64BIT_KERNEL)
#define clock_GetTime(cv) osi_GetTime((osi_timeval_t *)cv)
#else
#if (defined(AFS_AIX51_ENV) && defined(AFS_64BIT_KERNEL)) || (defined(AFS_DARWIN100_ENV) && defined(__amd64__)) || defined(AFS_XBSD_ENV)
#define clock_GetTime(cv) \
BEGIN \
struct timeval tv; \
osi_GetTime(&tv); \
(cv)->sec = (afs_int32)tv.tv_sec; \
(cv)->usec = (afs_int32)tv.tv_usec; \
END
#else /* defined(AFS_AIX51_ENV) && defined(AFS_64BIT_KERNEL) */
#define clock_GetTime(cv) osi_GetTime((osi_timeval_t *)(cv))
#endif /* defined(AFS_AIX51_ENV) && defined(AFS_64BIT_KERNEL) */
#endif
#define clock_Sec() osi_Time()
#define clock_NewTime() /* don't do anything; clock is fast enough in kernel */
#endif /* KERNEL */
/* Returns the elapsed time in milliseconds between clock values (*cv1) and (*cv2) */
#define clock_ElapsedTime(cv1, cv2) \
(((cv2)->sec - (cv1)->sec)*1000 + ((cv2)->usec - (cv1)->usec)/1000)
/* Some comparison operators for clock values */
#define clock_Gt(a, b) ((a)->sec>(b)->sec || ((a)->sec==(b)->sec && (a)->usec>(b)->usec))
#define clock_Ge(a, b) ((a)->sec>(b)->sec || ((a)->sec==(b)->sec && (a)->usec>=(b)->usec))
#define clock_Eq(a, b) ((a)->sec==(b)->sec && (a)->usec==(b)->usec)
#define clock_Le(a, b) ((a)->sec<(b)->sec || ((a)->sec==(b)->sec && (a)->usec<=(b)->usec))
#define clock_Lt(a, b) ((a)->sec<(b)->sec || ((a)->sec==(b)->sec && (a)->usec<(b)->usec))
/* Is the clock value zero? */
#define clock_IsZero(c) ((c)->sec == 0 && (c)->usec == 0)
/* Set the clock value to zero */
#define clock_Zero(c) ((c)->sec = (c)->usec = 0)
/* Add time c2 to time c1. Both c2 and c1 must be positive times. */
#define clock_Add(c1, c2) \
BEGIN \
(c1)->sec += (c2)->sec; \
if (((c1)->usec += (c2)->usec) >= 1000000) { \
(c1)->usec -= 1000000; \
(c1)->sec++; \
} \
END
#define USEC(cp) (((cp)->sec * 1000000) + (cp)->usec)
#define MSEC(cp) (((cp)->sec * 1000) + ((cp)->usec / 1000))
#define _4THMSEC(cp) (((cp)->sec * 4000) + ((cp)->usec / 250))
#define _8THMSEC(cp) (((cp)->sec * 8000) + ((cp)->usec / 125))
/* Add ms milliseconds to time c1. Both ms and c1 must be positive */
#define clock_Addmsec(c1, ms) \
BEGIN \
if ((ms) >= 1000) { \
(c1)->sec += (afs_int32)((ms) / 1000); \
(c1)->usec += (afs_int32)(((ms) % 1000) * 1000); \
} else { \
(c1)->usec += (afs_int32)((ms) * 1000); \
} \
if ((c1)->usec >= 1000000) { \
(c1)->usec -= 1000000; \
(c1)->sec++; \
} \
END
/* Subtract time c2 from time c1. c2 should be less than c1 */
#define clock_Sub(c1, c2) \
BEGIN \
if (((c1)->usec -= (c2)->usec) < 0) { \
(c1)->usec += 1000000; \
(c1)->sec--; \
} \
(c1)->sec -= (c2)->sec; \
END
#define clock_Float(c) ((c)->sec + (c)->usec/1e6)
/* Add square of time c2 to time c1. Both c2 and c1 must be positive times. */
#define clock_AddSq(c1, c2) \
BEGIN \
if((c2)->sec > 0 ) \
{ \
(c1)->sec += (c2)->sec * (c2)->sec \
+ 2 * (c2)->sec * (c2)->usec /1000000; \
(c1)->usec += (2 * (c2)->sec * (c2)->usec) % 1000000 \
+ ((c2)->usec / 1000)*((c2)->usec / 1000) \
+ 2 * ((c2)->usec / 1000) * ((c2)->usec % 1000) / 1000 \
+ ((((c2)->usec % 1000) > 707) ? 1 : 0); \
} \
else \
{ \
(c1)->usec += ((c2)->usec / 1000)*((c2)->usec / 1000) \
+ 2 * ((c2)->usec / 1000) * ((c2)->usec % 1000) / 1000 \
+ ((((c2)->usec % 1000) > 707) ? 1 : 0); \
} \
if ((c1)->usec > 1000000) { \
(c1)->usec -= 1000000; \
(c1)->sec++; \
} \
END
#endif /* _CLOCK_ */
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