/usr/include/zthread/Time.h is in libzthread-dev 2.3.2-8.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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* Copyright (c) 2005, Eric Crahen
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is furnished
* to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*
*/
#ifndef __ZTTIME_H__
#define __ZTTIME_H__
#include "zthread/Config.h"
namespace ZThread {
/**
* @class Time
* @author Eric Crahen <http://www.code-foo.com>
* @date <2003-07-16T17:52:46-0400>
* @version 2.2.11
*
* The Time class provides access to time values relative to when the program
* was started. In other words, this class might be thought of as a timer that
* starts at 0 and counts upwards. This class offers millisecond resolution.
*/
class ZTHREAD_API Time {
unsigned long _seconds;
unsigned long _milliseconds;
//! Create a new Time object
Time(unsigned long secs, unsigned long millis)
: _seconds(secs), _milliseconds(millis) { }
/**
* Set the number of milliseconds in this Time object.
*
* @param millis - new milliseconds value
* @return unsigned long old milliseconds value
*/
unsigned long milliseconds(unsigned long millis) {
unsigned long n = _milliseconds;
_milliseconds = millis;
return n;
}
/**
* Set the number of seconds in this Time object.
*
* @param secs - new seconds value
* @return unsigned long old seconds value
*/
unsigned long seconds(unsigned long secs) {
unsigned long n = _seconds;
_seconds = secs;
return n;
}
public:
/**
* Create a Time object with the current time relative to the
* beginning of the program.
*/
Time();
/**
* Create a Time object by copying another.
*
* @param t - Time object to copy.
*/
Time(const Time& t)
: _seconds(t._seconds), _milliseconds(t._milliseconds) { }
/**
* Get the number of milliseconds in this Time object.
*
* @return unsigned long milliseconds value
*/
unsigned long milliseconds() const {
return _milliseconds;
}
/**
* Get the number of seconds in this Time object.
*
* @return unsigned long seconds value
*/
unsigned long seconds() const {
return _seconds;
}
/**
* Add some number of milliseconds to this Time object.
*
* @param millis - number of milliseconds to add to this Time object
* @return const Time& this object
*/
const Time& operator+=(unsigned long millis) {
_milliseconds += millis;
_seconds += (_milliseconds / 1000);
_milliseconds %= 1000;
return *this;
}
/**
* Subtract some number of milliseconds to this Time object.
*
* @param millis - number of milliseconds to subtract from this Time object
* @return const Time& this object
*/
const Time& operator-=(unsigned long millis) {
if(_milliseconds > millis)
_milliseconds -= millis;
else {
while(_seconds > 0 && _milliseconds < millis) {
_milliseconds += 1000;
_seconds -= 1;
}
_milliseconds = (_milliseconds < millis) ? 0 : (_milliseconds - millis);
}
return *this;
}
/**
* Add the value of another Time object to this one.
*
* @param t - Time object whose value should be added to this object
* @return const Time& this object
*/
const Time& operator+=(const Time& t) {
_milliseconds += t.milliseconds();
_seconds += (_milliseconds / 1000) + t.seconds();
_milliseconds %= 1000;
return *this;
}
/**
* Subtract the value of another Time object from this one.
* This function has a floor of 0.
*
* @param t - Time object whose value should be subtracted from this object
* @return const Time& this object
*/
const Time& operator-=(const Time& t) {
unsigned long millis = t.milliseconds();
unsigned long secs = t.seconds();
if(_seconds >= secs) {
if(_milliseconds > millis) {
_milliseconds -= millis;
_seconds -= secs;
} else {
while(_seconds > 0 && _milliseconds < millis) {
_milliseconds += 1000;
_seconds -= 1;
}
_milliseconds = (_milliseconds < millis) ? 0 : (_milliseconds - millis);
_seconds = (_seconds < secs) ? 0 : (_seconds - secs);
}
} else {
_milliseconds = 0;
_seconds = 0;
}
return *this;
}
};
} // namespace ZThread
#endif // __ZTTIME_H__
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