/** * @file rtems/score/timestamp.h * * @brief Helpers for Manipulating Timestamps * * This include file contains helpers for manipulating timestamps. */ /* * COPYRIGHT (c) 1989-2009. * On-Line Applications Research Corporation (OAR). * * 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_SCORE_TIMESTAMP_H #define _RTEMS_SCORE_TIMESTAMP_H /** * @defgroup SuperCoreTimeStamp Score Timestamp * * @ingroup Score * * This handler encapsulates functionality related to manipulating * SuperCore Timestamps. SuperCore Timestamps may be used to * represent time of day, uptime, or intervals. * * The key attribute of the SuperCore Timestamp handler is that it * is a completely opaque handler. There can be multiple implementations * of the required functionality and with a recompile, RTEMS can use * any implementation. It is intended to be a simple wrapper. * * This handler can be implemented as either struct timespec or * unsigned64 bit numbers. The use of a wrapper class allows the * the implementation of timestamps to change on a per architecture * basis. This is an important option as the performance of this * handler is critical. */ /**@{*/ #include #include #include #ifdef __cplusplus extern "C" { #endif #if ! ( ( CPU_TIMESTAMP_USE_STRUCT_TIMESPEC == TRUE \ && CPU_TIMESTAMP_USE_INT64 == FALSE \ && CPU_TIMESTAMP_USE_INT64_INLINE == FALSE ) \ || ( CPU_TIMESTAMP_USE_STRUCT_TIMESPEC == FALSE \ && CPU_TIMESTAMP_USE_INT64 == TRUE \ && CPU_TIMESTAMP_USE_INT64_INLINE == FALSE ) \ || ( CPU_TIMESTAMP_USE_STRUCT_TIMESPEC == FALSE \ && CPU_TIMESTAMP_USE_INT64 == FALSE \ && CPU_TIMESTAMP_USE_INT64_INLINE == TRUE ) ) #error "Invalid SuperCore Timestamp implementations selection." #endif #if CPU_TIMESTAMP_USE_INT64 == TRUE || CPU_TIMESTAMP_USE_INT64_INLINE == TRUE #include #endif /** * Define the Timestamp control type. */ #if CPU_TIMESTAMP_USE_STRUCT_TIMESPEC == TRUE typedef struct timespec Timestamp_Control; #else typedef Timestamp64_Control Timestamp_Control; #endif /** * @brief Set timestamp to specified seconds and nanoseconds. * * This method sets the timestamp to the specified @a _seconds and @a _nanoseconds * value. * * @param[in] _time points to the timestamp instance to validate. * @param[in] _seconds is the seconds portion of the timestamp * @param[in] _nanoseconds is the nanoseconds portion of the timestamp */ #if CPU_TIMESTAMP_USE_STRUCT_TIMESPEC == TRUE #define _Timestamp_Set( _time, _seconds, _nanoseconds ) \ _Timespec_Set( _time, _seconds, _nanoseconds ) #else #define _Timestamp_Set( _time, _seconds, _nanoseconds ) \ _Timestamp64_Set( _time, _seconds, _nanoseconds ) #endif /** * @brief Sets the timestamp to zero. * * This method sets the timestamp to zero. * value. * * @param[in] _time points to the timestamp instance to zero. */ #if CPU_TIMESTAMP_USE_STRUCT_TIMESPEC == TRUE #define _Timestamp_Set_to_zero( _time ) \ _Timespec_Set_to_zero( _time ) #else #define _Timestamp_Set_to_zero( _time ) \ _Timestamp64_Set_to_zero( _time ) #endif /** * @brief Less than operator for timestamps. * * This method is the less than operator for timestamps. * * @param[in] _lhs points to the left hand side timestamp * @param[in] _rhs points to the right hand side timestamp * * @retval This method returns true if @a _lhs is less than the @a _rhs and * false otherwise. */ #if CPU_TIMESTAMP_USE_STRUCT_TIMESPEC == TRUE #define _Timestamp_Less_than( _lhs, _rhs ) \ _Timespec_Less_than( _lhs, _rhs ) #else #define _Timestamp_Less_than( _lhs, _rhs ) \ _Timestamp64_Less_than( _lhs, _rhs ) #endif /** * @brief Greater than operator for timestamps. * * This method is the greater than operator for timestamps. * * @param[in] _lhs points to the left hand side timestamp * @param[in] _rhs points to the right hand side timestamp * * @retval This method returns true if @a _lhs is greater than the @a _rhs and * false otherwise. */ #define _Timestamp_Greater_than( _lhs, _rhs ) \ _Timestamp_Less_than( _rhs, _lhs ) /** * @brief Equal to than operator for timestamps. * * This method is the is equal to than operator for timestamps. * * @param[in] _lhs points to the left hand side timestamp * @param[in] _rhs points to the right hand side timestamp * * @retval This method returns true if @a _lhs is equal to @a _rhs and * false otherwise. */ #if CPU_TIMESTAMP_USE_STRUCT_TIMESPEC == TRUE #define _Timestamp_Equal_to( _lhs, _rhs ) \ _Timespec_Equal_to( _lhs, _rhs ) #else #define _Timestamp_Equal_to( _lhs, _rhs ) \ _Timestamp64_Equal_to( _lhs, _rhs ) #endif /** * @brief Adds two timestamps. * * This routine adds two timestamps. The second argument is added * to the first. * * @param[in] _time points to the base time to be added to * @param[in] _add points to the timestamp to add to the first argument * * @retval This method returns the number of seconds @a time increased by. */ #if CPU_TIMESTAMP_USE_STRUCT_TIMESPEC == TRUE #define _Timestamp_Add_to( _time, _add ) \ _Timespec_Add_to( _time, _add ) #else #define _Timestamp_Add_to( _time, _add ) \ _Timestamp64_Add_to( _time, _add ) #endif /** * @brief Convert timestamp to number of clock ticks. * * This routine convert the @a time timestamp to the corresponding number * of clock ticks. * * @param[in] _time points to the time to be converted * * @retval This method returns the number of ticks computed. */ #if CPU_TIMESTAMP_USE_STRUCT_TIMESPEC == TRUE #define _Timestamp_To_ticks( _time ) \ _Timespec_To_ticks( _time ) #else #define _Timestamp_To_ticks( _time ) \ _Timestamp64_To_ticks( _time ) #endif /** * @brief Converts the @a _ticks value to timestamp format. * * This routine converts the @a _ticks value to the corresponding * timestamp format @a _time. * * @param[in] _time points to the timestamp format time result * @param[in] _ticks points to the number of ticks to be filled in */ #if CPU_TIMESTAMP_USE_STRUCT_TIMESPEC == TRUE #define _Timestamp_From_ticks( _ticks, _time ) \ _Timespec_From_ticks( _ticks, _time ) #else #define _Timestamp_From_ticks( _ticks, _time ) \ _Timestamp64_From_ticks( _ticks, _time ) #endif /** * @brief Subtracts two timestamps. * * This routine subtracts two timestamps. @a result is set to * @a end - @a start. * * @param[in] _start points to the starting time * @param[in] _end points to the ending time * @param[in] _result points to the difference between * starting and ending time. * * @retval This method fills in @a _result. */ #if CPU_TIMESTAMP_USE_STRUCT_TIMESPEC == TRUE #define _Timestamp_Subtract( _start, _end, _result ) \ _Timespec_Subtract( _start, _end, _result ) #else #define _Timestamp_Subtract( _start, _end, _result ) \ _Timestamp64_Subtract( _start, _end, _result ) #endif /** * @brief Divides a timestamp by another timestamp. * * This routine divides a timestamp by another timestamp. The * intended use is for calculating percentages to three decimal points. * * @param[in] _lhs points to the left hand number * @param[in] _rhs points to the right hand number * @param[in] _ival_percentage points to the integer portion of the average * @param[in] _fval_percentage points to the thousandths of percentage * * @retval This method fills in @a result. */ #if CPU_TIMESTAMP_USE_STRUCT_TIMESPEC == TRUE #define _Timestamp_Divide( _lhs, _rhs, _ival_percentage, _fval_percentage ) \ _Timespec_Divide( _lhs, _rhs, _ival_percentage, _fval_percentage ) #else #define _Timestamp_Divide( _lhs, _rhs, _ival_percentage, _fval_percentage ) \ _Timestamp64_Divide( _lhs, _rhs, _ival_percentage, _fval_percentage ) #endif /** * @brief Get seconds portion of timestamp. * * This method returns the seconds portion of the specified timestamp * * @param[in] _time points to the timestamp * * @retval The seconds portion of @a _time. */ #if CPU_TIMESTAMP_USE_STRUCT_TIMESPEC == TRUE #define _Timestamp_Get_seconds( _time ) \ _Timespec_Get_seconds( _time ) #else #define _Timestamp_Get_seconds( _time ) \ _Timestamp64_Get_seconds( _time ) #endif /** * @brief Get nanoseconds portion of timestamp. * * This method returns the nanoseconds portion of the specified timestamp * * @param[in] _time points to the timestamp * * @retval The nanoseconds portion of @a _time. */ #if CPU_TIMESTAMP_USE_STRUCT_TIMESPEC == TRUE #define _Timestamp_Get_nanoseconds( _time ) \ _Timespec_Get_nanoseconds( _time ) #else #define _Timestamp_Get_nanoseconds( _time ) \ _Timestamp64_Get_nanoseconds( _time ) #endif /** * @brief Get the timestamp as nanoseconds. * * This method returns the timestamp as nanoseconds. * * @param[in] _time points to the timestamp * * @retval The time in nanoseconds. */ #if CPU_TIMESTAMP_USE_STRUCT_TIMESPEC == TRUE #define _Timestamp_Get_As_nanoseconds( _timestamp, _nanoseconds ) \ _Timespec_Get_As_nanoseconds( _timestamp, _nanoseconds ) #else #define _Timestamp_Get_As_nanoseconds( _timestamp, _nanoseconds ) \ _Timestamp64_Get_As_nanoseconds( _timestamp, _nanoseconds ) #endif /** * @brief Convert timestamp to struct timespec. * * This method returns the seconds portion of the specified @a _timestamp. * * @param[in] _timestamp points to the timestamp * @param[in] _timespec points to the timespec */ #if CPU_TIMESTAMP_USE_STRUCT_TIMESPEC == TRUE /* in this case we know they are the same type so use simple assignment */ #define _Timestamp_To_timespec( _timestamp, _timespec ) \ *(_timespec) = *(_timestamp) #else #define _Timestamp_To_timespec( _timestamp, _timespec ) \ _Timestamp64_To_timespec( _timestamp, _timespec ) #endif /** * @brief Convert timestamp to struct timeval. * * @param[in] _timestamp points to the timestamp * @param[in] _timeval points to the timeval */ #if CPU_TIMESTAMP_USE_STRUCT_TIMESPEC == TRUE #define _Timestamp_To_timeval( _timestamp, _timeval ) \ do { \ (_timeval)->tv_sec = (_timestamp)->tv_sec; \ (_timeval)->tv_usec = (_timestamp)->tv_nsec / 1000; \ } while (0) #else #define _Timestamp_To_timeval( _timestamp, _timeval ) \ _Timestamp64_To_timeval( _timestamp, _timeval ) #endif #ifdef __cplusplus } #endif /**@}*/ #endif /* end of include file */