/**
* @file
*
* @brief Timespec API
*
* This include file contains API for manipulating timespecs.
*/
/*
* Copyright (c) 2012.
* Krzysztof Miesowicz <krzysztof.miesowicz@gmail.com>
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.rtems.org/license/LICENSE.
*/
#ifndef _RTEMS_TIMESPEC_H
#define _RTEMS_TIMESPEC_H
#include <rtems/score/timespec.h>
#ifdef __cplusplus
extern "C" {
#endif
/**
* @defgroup TimespecAPI Timespec
*
* @ingroup RTEMSAPIClassic
*
* @brief Timespec API
*
* @{
*
*/
/**
* @brief Is timespec valid
*
* This method determines the validity of a timespec.
*
* @param[in] time is the timespec instance to validate.
*
* @retval true The timespec is valid.
* @retval false The timespec is not valid.
*/
RTEMS_INLINE_ROUTINE bool rtems_timespec_is_valid(
const struct timespec *time
)
{
return _Timespec_Is_valid(time);
}
/**
* @brief Timespec less than operator.
*
* This method is the less than operator for timespecs.
*
* @param[in] lhs is the left hand side timespec
* @param[in] rhs is the right hand side timespec
*
* @retval true @a lhs is less than @a rhs.
* @retval false @a lhs is not less than @a rhs.
*
*/
RTEMS_INLINE_ROUTINE bool rtems_timespec_less_than(
const struct timespec *lhs,
const struct timespec *rhs
)
{
return _Timespec_Less_than(lhs,rhs);
}
/**
* @brief Add to a timespec.
*
* This routine adds two timespecs. The second argument is added
* to the first.
*
* @param[in] time is the base time to be added to
* @param[in] add is the timespec to add to the first argument
*
* @return This method returns the number of seconds @a time increased by.
*/
RTEMS_INLINE_ROUTINE uint32_t rtems_timespec_add_to(
struct timespec *time,
const struct timespec *add
)
{
return _Timespec_Add_to(time,add);
}
/**
* @brief Convert timespec to number of ticks.
*
* This routine convert the @a time timespec to the corresponding number
* of clock ticks.
*
* @param[in] time is the time to be converted
*
* @return This method returns the number of ticks computed.
*/
RTEMS_INLINE_ROUTINE uint32_t rtems_timespec_to_ticks(
const struct timespec *time
)
{
return _Timespec_To_ticks(time);
}
/**
* @brief Convert ticks to timespec.
*
* This routine converts the @a ticks value to the corresponding
* timespec format @a time.
*
* @param[in] time is the timespec format time result
* @param[in] ticks is the number of ticks to convert
*/
RTEMS_INLINE_ROUTINE void rtems_timespec_from_ticks(
uint32_t ticks,
struct timespec *time
)
{
_Timespec_From_ticks(ticks,time);
}
/**
* @brief Subtract two timespec.
*
* This routine subtracts two timespecs. @a result is set to
* @a end - @a start.
*
* @param[in] start is the starting time
* @param[in] end is the ending time
* @param[in] result is the difference between starting and ending time.
*
* @return This method fills in @a result.
*/
RTEMS_INLINE_ROUTINE void rtems_timespec_subtract(
const struct timespec *start,
const struct timespec *end,
struct timespec *result
)
{
_Timespec_Subtract(start,end,result);
}
/**
* @brief Divide timespec by integer.
*
* This routine divides a timespec by an integer value. The expected
* use is to assist in benchmark calculations where you typically
* divide a duration by a number of iterations.
*
* @param[in] time is the total
* @param[in] iterations is the number of iterations
* @param[in] result is the average time.
*
* @return This method fills in @a result.
*/
RTEMS_INLINE_ROUTINE void rtems_timespec_divide_by_integer(
const struct timespec *time,
uint32_t iterations,
struct timespec *result
)
{
_Timespec_Divide_by_integer(time,iterations,result);
}
/**
* @brief Divide timespec.
*
* This routine divides a timespec by another timespec. The
* intended use is for calculating percentages to three decimal points.
*
* @param[in] lhs is the left hand number
* @param[in] rhs is the right hand number
* @param[in] ival_percentage is the integer portion of the average
* @param[in] fval_percentage is the thousandths of percentage
*
* @return This method fills in @a result.
*/
RTEMS_INLINE_ROUTINE void rtems_timespec_divide(
const struct timespec *lhs,
const struct timespec *rhs,
uint32_t *ival_percentage,
uint32_t *fval_percentage
)
{
_Timespec_Divide(lhs,rhs,ival_percentage,fval_percentage);
}
/**
* @brief Set timespec to seconds nanosecond.
*
* This method sets the timespec to the specified seconds and nanoseconds
* value.
*
* @param[in] _time points to the timespec instance to validate.
* @param[in] _seconds is the seconds portion of the timespec
* @param[in] _nanoseconds is the nanoseconds portion of the timespec
*/
RTEMS_INLINE_ROUTINE void rtems_timespec_set(
struct timespec *_time,
time_t _seconds,
uint32_t _nanoseconds
)
{
_Timespec_Set( _time, _seconds, _nanoseconds );
}
/**
* @brief Zero timespec.
*
* This method sets the timespec to zero.
* value.
*
* @param[in] _time points to the timespec instance to zero.
*/
RTEMS_INLINE_ROUTINE void rtems_timespec_zero(
struct timespec *_time
)
{
_Timespec_Set_to_zero( _time );
}
/**
* @brief Get seconds portion of timespec.
*
* This method returns the seconds portion of the specified timespec
*
* @param[in] _time points to the timespec
*
* @return The seconds portion of @a _time.
*/
RTEMS_INLINE_ROUTINE time_t rtems_timespec_get_seconds(
struct timespec *_time
)
{
return _Timespec_Get_seconds( _time );
}
/**
* @brief Get nanoseconds portion of timespec.
*
* This method returns the nanoseconds portion of the specified timespec
*
* @param[in] _time points to the timespec
*
* @return The nanoseconds portion of @a _time.
*/
RTEMS_INLINE_ROUTINE uint32_t rtems_timespec_get_nanoseconds(
struct timespec *_time
)
{
return _Timespec_Get_nanoseconds( _time );
}
/**
* @brief Timespec greater than operator.
*
* This method is the greater than operator for timespecs.
*
* @param[in] _lhs is the left hand side timespec
* @param[in] _rhs is the right hand side timespec
*
* @retval true @a _lhs is greater than @a _rhs.
* @retval false @a _lhs is not greater than @a _rhs.
*/
RTEMS_INLINE_ROUTINE bool rtems_timespec_greater_than(
const struct timespec *_lhs,
const struct timespec *_rhs
)
{
return _Timespec_Greater_than( _lhs, _rhs );
}
/**
* @brief Timespec equal to Operator
*
* This method is the is equal to than operator for timespecs.
*
* @param[in] lhs is the left hand side timespec
* @param[in] rhs is the right hand side timespec
*
* @retval true @a lhs is equal to @a rhs.
* @retval false @a lhs is not equal to @a rhs.
*/
RTEMS_INLINE_ROUTINE bool rtems_timespec_equal_to(
const struct timespec *lhs,
const struct timespec *rhs
)
{
return _Timespec_Equal_to( lhs, rhs);
}
/** @} */
#ifdef __cplusplus
}
#endif
#endif
/* end of include file */
