/usr/include/xenomai/native/timer.h is in libxenomai-dev 2.5.5.2-1ubuntu2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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* @file
* This file is part of the Xenomai project.
*
* @note Copyright (C) 2004 Philippe Gerum <rpm@xenomai.org>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of the
* License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*
* \ingroup native_timer
*/
/*!
* \ingroup native
* \addtogroup native_timer
*@{*/
#ifndef _XENO_TIMER_H
#define _XENO_TIMER_H
#include <native/types.h>
#define TM_ONESHOT XN_APERIODIC_TICK
/** Structure containing timer-information useful to users.
*
* @see rt_timer_inquire()
*/
typedef struct rt_timer_info {
RTIME period; /* !< Current status (unset, aperiodic, period). */
RTIME date; /* !< Current wallclock time. */
RTIME tsc; /* !< Current tsc count. */
} RT_TIMER_INFO;
#if defined(__KERNEL__) || defined(__XENO_SIM__)
#include <nucleus/timer.h>
#ifdef __KERNEL__
#include <asm-generic/xenomai/timeconv.h>
#endif
extern xntbase_t *__native_tbase;
#endif /* __KERNEL__ || __XENO_SIM__ */
#ifdef __cplusplus
extern "C" {
#endif
#if (defined(__KERNEL__) || defined(__XENO_SIM__)) && !defined(DOXYGEN_CPP)
static inline SRTIME rt_timer_ns2tsc(SRTIME ns)
{
return xnarch_ns_to_tsc(ns);
}
static inline SRTIME rt_timer_tsc2ns(SRTIME ticks)
{
return xnarch_tsc_to_ns(ticks);
}
static inline RTIME rt_timer_tsc(void)
{
return xnarch_get_cpu_tsc();
}
static inline RTIME rt_timer_read(void)
{
return xntbase_get_time(__native_tbase);
}
static inline SRTIME rt_timer_ns2ticks(SRTIME ns)
{
return xntbase_ns2ticks(__native_tbase, ns);
}
static inline SRTIME rt_timer_ticks2ns(SRTIME ticks)
{
return xntbase_ticks2ns(__native_tbase, ticks);
}
#else /* !(__KERNEL__ || __XENO_SIM__) */
/**
* @fn SRTIME rt_timer_ns2tsc(SRTIME ns)
* @brief Convert nanoseconds to local CPU clock ticks.
*
* Convert a count of nanoseconds to local CPU clock ticks.
* This routine operates on signed nanosecond values.
*
* @param ns The count of nanoseconds to convert.
*
* @return The corresponding value expressed in CPU clock ticks.
*
* Environments:
*
* This service can be called from:
*
* - Kernel module initialization/cleanup code
* - Interrupt service routine
* - Kernel-based task
* - User-space task
*
* Rescheduling: never.
*/
SRTIME rt_timer_ns2tsc(SRTIME ns);
/*!
* @fn SRTIME rt_timer_tsc2ns(SRTIME ticks)
* @brief Convert local CPU clock ticks to nanoseconds.
*
* Convert a local CPU clock ticks to nanoseconds.
* This routine operates on signed tick values.
*
* @param ticks The count of local CPU clock ticks to convert.
*
* @return The corresponding value expressed in nanoseconds.
*
* Environments:
*
* This service can be called from:
*
* - Kernel module initialization/cleanup code
* - Interrupt service routine
* - Kernel-based task
* - User-space task
*
* Rescheduling: never.
*/
SRTIME rt_timer_tsc2ns(SRTIME ticks);
/*!
* @fn RTIME rt_timer_tsc(void)
* @brief Return the current TSC value.
*
* Return the value of the time stamp counter (TSC) maintained by the
* CPU of the underlying architecture.
*
* @return The current value of the TSC.
*
* Environments:
*
* This service can be called from:
*
* - Kernel module initialization/cleanup code
* - Interrupt service routine
* - Kernel-based task
* - User-space task
*
* Rescheduling: never.
*/
RTIME rt_timer_tsc(void);
/*!
* @fn RTIME rt_timer_read(void)
* @brief Return the current system time.
*
* Return the current time maintained by the master time base.
*
* @return The current time expressed in clock ticks (see note).
*
* Environments:
*
* This service can be called from:
*
* - Kernel module initialization/cleanup code
* - Interrupt service routine
* - Kernel-based task
* - User-space task
*
* Rescheduling: never.
*
* @note The value returned will represent a count of jiffies if the
* native skin is bound to a periodic time base (see
* CONFIG_XENO_OPT_NATIVE_PERIOD), or nanoseconds otherwise.
*/
RTIME rt_timer_read(void);
/**
* @fn SRTIME rt_timer_ns2ticks(SRTIME ns)
* @brief Convert nanoseconds to internal clock ticks.
*
* Convert a count of nanoseconds to internal clock ticks.
* This routine operates on signed nanosecond values.
*
* @param ns The count of nanoseconds to convert.
*
* @return The corresponding value expressed in internal clock ticks.
*
* Environments:
*
* This service can be called from:
*
* - Kernel module initialization/cleanup code
* - Interrupt service routine
* - Kernel-based task
* - User-space task
*
* Rescheduling: never.
*/
SRTIME rt_timer_ns2ticks(SRTIME ns);
/*!
* @fn SRTIME rt_timer_ticks2ns(SRTIME ticks)
* @brief Convert internal clock ticks to nanoseconds.
*
* Convert a count of internal clock ticks to nanoseconds.
* This routine operates on signed tick values.
*
* @param ticks The count of internal clock ticks to convert.
*
* @return The corresponding value expressed in nanoseconds.
*
* Environments:
*
* This service can be called from:
*
* - Kernel module initialization/cleanup code
* - Interrupt service routine
* - Kernel-based task
* - User-space task
*
* Rescheduling: never.
*/
SRTIME rt_timer_ticks2ns(SRTIME ticks);
#endif /* !(__KERNEL__ || __XENO_SIM__) */
int rt_timer_inquire(RT_TIMER_INFO *info);
RTIME rt_timer_read(void);
void rt_timer_spin(RTIME ns);
int rt_timer_set_mode(RTIME nstick);
#ifdef __cplusplus
}
#endif
/*@}*/
#endif /* !_XENO_TIMER_H */
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