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/*
* util_time - Time related helper functions and definitions
*
* Copyright IBM Corp. 2025
*
* s390-tools is free software; you can redistribute it and/or modify
* it under the terms of the MIT license. See LICENSE for details.
*/
#ifndef LIB_UTIL_TIME_H
#define LIB_UTIL_TIME_H
#define NSEC_PER_USEC 1000L
#define NSEC_PER_MSEC 1000000L
#define NSEC_PER_SEC 1000000000L
#define USEC_PER_MSEC 1000L
#define USEC_PER_SEC 1000000L
#define MSEC_PER_SEC 1000L
/**
* Convert nanoseconds to microseconds
*
* Convert value from nanoseconds to microseconds by dividing the
* value to NSEC_PER_USEC constant.
*
* @param[in] val Time value in nanoseconds
*
* @returns Time value in microseconds
*/
static inline double util_nsecs_to_usecs(double val)
{
return val / NSEC_PER_USEC;
}
/**
* Convert nanoseconds to milliseconds
*
* Convert value from nanoseconds to milliseconds by dividing the
* value to NSEC_PER_MSEC constant.
*
* @param[in] val Time value in nanoseconds
*
* @returns Time value in milliseconds
*/
static inline double util_nsecs_to_msecs(double val)
{
return val / NSEC_PER_MSEC;
}
/**
* Convert nanoseconds to seconds
*
* Convert value from nanoseconds to seconds by dividing the
* value to NSEC_PER_SEC constant.
*
* @param[in] val Time value in nanoseconds
*
* @returns Time value in seconds
*/
static inline double util_nsecs_to_secs(double val)
{
return val / NSEC_PER_SEC;
}
/**
* Convert microseconds to nanoseconds
*
* Convert value from microseconds to nanoseconds by multiplying the
* value with NSEC_PER_USEC constant.
*
* @param[in] val Time value in microseconds
*
* @returns Time value in nanoseconds
*/
static inline double util_usecs_to_nsecs(double val)
{
return val * NSEC_PER_USEC;
}
/**
* Convert microseconds to milliseconds
*
* Convert value from microseconds to milliseconds by dividing the
* value to USEC_PER_MSEC constant.
*
* @param[in] val Time value in microseconds
*
* @returns Time value in milliseconds
*/
static inline double util_usecs_to_msecs(double val)
{
return val / USEC_PER_MSEC;
}
/**
* Convert microseconds to seconds
*
* Convert value from microseconds to seconds by dividing the
* value to USEC_PER_SEC constant.
*
* @param[in] val Time value in nanoseconds
*
* @returns Time value in seconds
*/
static inline double util_usecs_to_secs(double val)
{
return val / USEC_PER_SEC;
}
/**
* Convert milliseconds to nanoseconds
*
* Convert value from milliseconds to nanoseconds by multiplying the
* value with NSEC_PER_MSEC constant.
*
* @param[in] val Time value in milliseconds
*
* @returns Time value in nanoseconds
*/
static inline double util_msecs_to_nsecs(double val)
{
return val * NSEC_PER_MSEC;
}
/**
* Convert milliseconds to microseconds
*
* Convert value from milliseconds to microseconds by multiplying the
* value with USEC_PER_MSEC constant.
*
* @param[in] val Time value in milliseconds
*
* @returns Time value in microseconds
*/
static inline double util_msecs_to_usecs(double val)
{
return val * USEC_PER_MSEC;
}
/**
* Convert milliseconds to seconds
*
* Convert value from milliseconds to seconds by dividing the
* value to MSEC_PER_SEC constant.
*
* @param[in] val Time value in milliseconds
*
* @returns Time value in seconds
*/
static inline double util_msecs_to_secs(double val)
{
return val / MSEC_PER_SEC;
}
/**
* Convert seconds to nanoseconds
*
* Convert value from seconds to nanoseconds by multiplying the
* value with NSEC_PER_SEC constant.
*
* @param[in] val Time value in seconds
*
* @returns Time value in nanoseconds
*/
static inline double util_secs_to_nsecs(double val)
{
return val * NSEC_PER_SEC;
}
/**
* Convert seconds to microseconds
*
* Convert value from seconds to microseconds by multiplying the
* value with USEC_PER_SEC constant.
*
* @param[in] val Time value in seconds
*
* @returns Time value in microseconds
*/
static inline double util_secs_to_usecs(double val)
{
return val * USEC_PER_SEC;
}
/**
* Convert seconds to milliseconds
*
* Convert value from seconds to milliseconds by multiplying the
* value with MSEC_PER_SEC constant.
*
* @param[in] val Time value in seconds
*
* @returns Time value in milliseconds
*/
static inline double util_secs_to_msecs(double val)
{
return val * MSEC_PER_SEC;
}
#endif /* LIB_UTIL_TIME_H */
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