pxmlw6n2f/Gazebo_Distributed_MPI/gazebo/common/Time.hh

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2019-04-18 10:27:54 +08:00
/*
* Copyright (C) 2012 Open Source Robotics Foundation
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*/
#ifndef _GAZEBO_COMMON_TIME_HH_
#define _GAZEBO_COMMON_TIME_HH_
#include <string>
#include <stdlib.h>
#include <time.h>
#include <iostream>
#include "gazebo/common/CommonTypes.hh"
#include "gazebo/util/system.hh"
namespace gazebo
{
namespace common
{
/// \brief Convert seconds to hours. This divides the given value by
/// the number of seconds in an hour, which is 3600.
/// \param[in] _s Seconds to convert.
#define GZ_SEC_TO_HOUR(_s) ((_s) / 3600.0)
/// \addtogroup gazebo_common
/// \{
/// \class Time Time.hh common/common.hh
/// \brief A Time class, can be used to hold wall- or sim-time.
/// stored as sec and nano-sec.
class GZ_COMMON_VISIBLE Time
{
/// \brief A static zero time variable set to common::Time(0, 0).
public: static const Time Zero;
/// \brief A static time variable set to a second: common::Time(1, 0).
public: static const Time Second;
/// \brief A static time variable set to an hour: common::Time(3600, 0).
public: static const Time Hour;
/// \enum Format options
/// \brief Options for formatting time as a string.
public: enum FormatOption
{
/// \brief Days
DAYS = 0,
/// \brief Hours
HOURS = 1,
/// \brief Minutes
MINUTES = 2,
/// \brief Seconds
SECONDS = 3,
/// \brief Milliseconds
MILLISECONDS = 4
};
/// \brief Constructors
public: Time();
/// \brief Copy constructor
/// \param[in] time Time to copy
public: Time(const Time &_time);
/// \brief Constructor
/// \param[in] _tv Time to initialize to
public: Time(const struct timeval &_tv);
/// \brief Constructor
/// \param[in] _tv Time to initialize to
public: Time(const struct timespec &_tv);
/// \brief Constructor
/// \param[in] _sec Seconds
/// \param[in] _nsec Nanoseconds
public: Time(int32_t _sec, int32_t _nsec);
/// \brief Constuctor
/// \param[in] _time Time in double format sec.nsec
public: Time(double _time);
/// \brief Destructor
public: virtual ~Time();
/// \brief Get a Time object that represents the maximum amount of time
/// that this class can represent.
/// \return The largest duration of time that can be represented by this
/// data structure. This is approximately 68 years.
public: static Time Maximum();
/// \brief Get the wall time
/// \return the current time
public: static const Time &GetWallTime();
/// \brief Get the wall time as an ISO string: YYYY-MM-DDTHH:MM:SS
/// \return The current wall time as an ISO string.
public: static const std::string &GetWallTimeAsISOString();
/// \brief Set the time to the wall time
public: void SetToWallTime();
/// \brief Set to sec and nsec
/// \param[in] _sec Seconds
/// \param[in] _nsec Nanoseconds
public: void Set(int32_t _sec, int32_t _nsec);
/// \brief Set to seconds
/// \param[in] _seconds Number of seconds
public: void Set(double _seconds);
/// \brief Get the time as a double
/// \return Time as a double in seconds
public: double Double() const;
/// \brief Get the time as a float
/// \return Time as a float in seconds
public: float Float() const;
/// \brief Get the time as a string formatted as "DD hh:mm:ss.mmm", with
/// the option to choose the start/end.
/// \param[in] _start Start point.
/// \param[in] _end End point.
/// \return String representing time.
public: std::string FormattedString(FormatOption _start = DAYS,
FormatOption _end = MILLISECONDS) const;
/// \brief Sleep for the specified time
/// \param[in] _time Sleep time
/// \return Time actually slept
public: static Time Sleep(const common::Time &_time);
/// \brief Millisecond sleep
/// \param[in] _ms milliseconds
/// \return Time actually slept
public: static Time MSleep(unsigned int _ms);
/// \brief Nano sleep
/// \param[in] _ns nanoseconds
/// \return Time actually slept
public: static Time NSleep(unsigned int _ns);
/// \brief Assignment operator
/// \param[in] _tv the new time
/// \return a reference to this instance
public: Time &operator =(const struct timeval &_tv);
/// \brief Assignment operator
/// \param[in] _tv the new time
/// \return a reference to this instance
public: Time &operator =(const struct timespec &_tv);
/// \brief Assignment operator
/// \param[in] _time the new time
/// \return a reference to this instance
public: Time &operator =(const Time &_time);
/// \brief Addition operators
/// \param[in] _tv the time to add
/// \return a Time instance
public: Time operator +(const struct timeval &_tv) const;
/// \brief Addition operators
/// \param[in] _tv the time to add
/// \return a Time instance
public: Time operator +(const struct timespec &_tv) const;
/// \brief Addition assignment operator
/// \param[in] _tv the time to add
/// \return a reference to this instance
public: const Time &operator +=(const struct timeval &_tv);
/// \brief Addition assignment operator
/// \param[in] _tv the time to add
/// \return a reference to this instance
public: const Time &operator +=(const struct timespec &_tv);
/// \brief Addition operators
/// \param[in] _time The time to add
/// \return a Time instance
public: Time operator +(const Time &_time) const;
/// \brief Addition assignemtn operator
/// \param[in] _time The time to add
/// \return a Time instance
public: const Time &operator +=(const Time &_time);
/// \brief Subtraction operator
/// \param[in] _tv The time to subtract
/// \return a Time instance
public: Time operator -(const struct timeval &_tv) const;
/// \brief Subtraction assignment operator
/// \param[in] _tv The time to subtract
/// \return a Time instance
public: const Time &operator -=(const struct timeval &_tv);
/// \brief Subtraction operator
/// \param[in] _tv The time to subtract
/// \return a Time instance
public: Time operator -(const struct timespec &_tv) const;
/// \brief Subtraction assignment operator
/// \param[in] _tv The time to subtract
/// \return a Time instance
public: const Time &operator -=(const struct timespec &_tv);
/// \brief Subtraction operator
/// \param[in] _time The time to subtract
/// \return a Time instance
public: Time operator -(const Time &_time) const;
/// \brief Subtraction assignment operator
/// \param[in] _time The time to subtract
/// \return a reference to this instance
public: const Time &operator -=(const Time &_time);
/// \brief Multiplication operator
/// \param[in] _tv The scaling duration
/// \return Time instance
public: Time operator *(const struct timeval &_tv) const;
/// \brief Multiplication assignment operator
/// \param[in] _tv the scaling duration
/// \return a reference to this instance
public: const Time &operator *=(const struct timeval &_tv);
/// \brief Multiplication operator
/// \param[in] _tv the scaling duration
/// \return Time instance
public: Time operator *(const struct timespec &_tv) const;
/// \brief Multiplication assignment operator
/// \param[in] _tv the scaling duration
/// \return a reference to this instance
public: const Time &operator *=(const struct timespec &_tv);
/// \brief Multiplication operators
/// \param[in] _time the scaling factor
/// \return a scaled Time instance
public: Time operator *(const Time &_time) const;
/// \brief Multiplication operators
/// \param[in] _time scale factor
/// \return a scaled Time instance
public: const Time &operator *=(const Time &_time);
/// \brief Division operator
/// \param[in] _tv a timeval divisor
/// \return a Time instance
public: Time operator /(const struct timeval &_tv) const;
/// \brief Division assignment operator
/// \param[in] _tv a divisor
/// \return a Time instance
public: const Time &operator /=(const struct timeval &_tv);
/// \brief Division operator
/// \param[in] _tv a timespec divisor
/// \return a Time instance
public: Time operator /(const struct timespec &_tv) const;
/// \brief Division assignment operator
/// \param[in] _tv a divisor
/// \return a Time instance
public: const Time &operator /=(const struct timespec &_tv);
/// \brief Division operator
/// \param[in] _time the divisor
/// \return a Time instance
public: Time operator /(const Time &_time) const;
/// \brief Division assignment operator
/// \param[in] time the divisor
/// \return a Time instance
public: const Time &operator /=(const Time &time);
/// \brief Equal to operator
/// \param[in] _tv the time to compare to
/// \return true if values are the same, false otherwise
public: bool operator ==(const struct timeval &_tv) const;
/// \brief Equal to operator
/// \param[in] _tv the time to compare to
/// \return true if values are the same, false otherwise
public: bool operator ==(const struct timespec &_tv) const;
/// \brief Equal to operator
/// \param[in] _time the time to compare to
/// \return true if values are the same, false otherwise
public: bool operator ==(const Time &_time) const;
/// \brief Equal to operator
/// \param[in] _time the time to compare to
/// \return true if values are the same, false otherwise
public: bool operator ==(double _time) const;
/// \brief Equal to operator
/// \param[in] _tv the time to compare to
/// \return true if values are the same, false otherwise
public: bool operator!=(const struct timeval &_tv) const;
/// \brief Equal to operator
/// \param[in] _tv the time to compare to
/// \return true if values are the same, false otherwise
public: bool operator!=(const struct timespec &_tv) const;
/// \brief Equal to operator
/// \param[in] _time the time to compare to
/// \return true if values are the same, false otherwise
public: bool operator!=(const Time &_time) const;
/// \brief Equal to operator
/// \param[in] _time the time to compare to
/// \return true if values are the same, false otherwise
public: bool operator!=(double _time) const;
/// \brief Less than operator
/// \param[in] _tv the time to compare with
/// \return true if tv is shorter than this, false otherwise
public: bool operator<(const struct timeval &_tv) const;
/// \brief Less than operator
/// \param[in] _tv the time to compare with
/// \return true if tv is shorter than this, false otherwise
public: bool operator<(const struct timespec &_tv) const;
/// \brief Less than operator
/// \param[in] _time the time to compare with
/// \return true if time is shorter than this, false otherwise
public: bool operator<(const Time &_time) const;
/// \brief Less than operator
/// \param[in] _time the time to compare with
/// \return true if time is shorter than this, false otherwise
public: bool operator<(double _time) const;
/// \brief Less than or equal to operator
/// \param[in] _tv the time to compare with
/// \return true if tv is shorter than or equal to this, false otherwise
public: bool operator<=(const struct timeval &_tv) const;
/// \brief Less than or equal to operator
/// \param[in] _tv the time to compare with
/// \return true if tv is shorter than or equal to this, false otherwise
public: bool operator<=(const struct timespec &_tv) const;
/// \brief Less than or equal to operator
/// \param[in] _time the time to compare with
/// \return true if time is shorter than or equal to this, false otherwise
public: bool operator<=(const Time &_time) const;
/// \brief Less than or equal to operator
/// \param[in] _time the time to compare with
/// \return true if time is shorter than or equal to this, false otherwise
public: bool operator<=(double _time) const;
/// \brief Greater than operator
/// \param[in] _tv the time to compare with
/// \return true if time is greater than this, false otherwise
public: bool operator>(const struct timeval &_tv) const;
/// \brief Greater than operator
/// \param[in] _tv the time to compare with
/// \return true if time is greater than this, false otherwise
public: bool operator>(const struct timespec &_tv) const;
/// \brief Greater than operator
/// \param[in] _time the time to compare with
/// \return true if time is greater than this, false otherwise
public: bool operator>(const Time &_time) const;
/// \brief Greater than operator
/// \param[in] _time the time to compare with
/// \return true if time is greater than this, false otherwise
public: bool operator>(double _time) const;
/// \brief Greater than or equal operator
/// \param[in] _tv the time to compare with
/// \return true if tv is greater than or equal to this, false otherwise
public: bool operator>=(const struct timeval &_tv) const;
/// \brief Greater than or equal operator
/// \param[in] _tv the time to compare with
/// \return true if tv is greater than or equal to this, false otherwise
public: bool operator>=(const struct timespec &_tv) const;
/// \brief Greater than or equal operator
/// \param[in] _time the time to compare with
/// \return true if time is greater than or equal to this, false otherwise
public: bool operator>=(const Time &_time) const;
/// \brief Greater than or equal operator
/// \param[in] _time the time to compare with
/// \return true if time is greater than or equal to this, false otherwise
public: bool operator>=(double _time) const;
/// \brief Convert seconds to nanoseconds
/// \param[in] _sec duration in seconds
/// \return nanoseconds
public: static inline double SecToNano(double _sec)
{ return _sec * 1e9;}
/// \brief Convert milliseconds to nanoseconds
/// \param[in] _ms milliseconds
/// \return nanoseconds
public: static inline double MilToNano(double _ms)
{ return _ms * 1e6;}
/// \brief Convert microseconds to nanoseconds
/// \param _ms microseconds
/// \return nanoseconds
public: static inline double MicToNano(double _ms)
{ return _ms * 1e3;}
/// \brief Stream insertion operator
/// \param[in] _out the output stream
/// \param[in] _time time to write to the stream
/// \return the output stream
public: friend std::ostream &operator<<(std::ostream &_out,
const gazebo::common::Time &_time)
{
_out << _time.sec << " " << _time.nsec;
return _out;
}
/// \brief Stream extraction operator
/// \param[in] _in the input stream
/// \param[in] _time time to read from to the stream
/// \return the input stream
public: friend std::istream &operator>>(std::istream &_in,
gazebo::common::Time &_time)
{
// Skip white spaces
_in.setf(std::ios_base::skipws);
_in >> _time.sec >> _time.nsec;
return _in;
}
/// \brief Seconds
public: int32_t sec;
/// \brief Nanoseconds
public: int32_t nsec;
/// \brief Constant multiplier to convert from nanoseconds to seconds.
public: static const int32_t nsInSec;
/// \brief Constant multiplier to convert from nanoseconds to
/// milliseconds.
public: static const int32_t nsInMs;
/// \brief a singleton value of the last GetWallTime() value
private: static Time wallTime;
/// \brief Wall time as an ISO string.
private: static std::string wallTimeISO;
/// \brief Correct the time so that small additions/substractions
/// preserve the internal seconds and nanoseconds separation
private: inline void Correct()
{
// In the case sec and nsec have different signs, normalize
if (this->sec > 0 && this->nsec < 0)
{
int32_t n = abs(this->nsec / this->nsInSec) + 1;
this->sec -= n;
this->nsec += n * this->nsInSec;
}
if (this->sec < 0 && this->nsec > 0)
{
int32_t n = abs(this->nsec / this->nsInSec) + 1;
this->sec += n;
this->nsec -= n * this->nsInSec;
}
// Make any corrections
this->sec += this->nsec / this->nsInSec;
this->nsec = this->nsec % this->nsInSec;
}
private: static struct timespec clockResolution;
};
/// \}
}
}
#endif