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// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
/**
* @author Peter Boros
* @date 2004/08/20
* @version $Id$
* @file timestamp.h
* @brief Simple timestamp class.
*/
#pragma once
#include <sys/time.h>
#include <time.h>
namespace fsa {
// {{{ class TimeStamp
/**
* @class TimeStamp
* @brief Simple timestamp class.
*/
class TimeStamp {
private:
struct timeval _ts;
public:
/**
* @brief Constructor, registers current time.
*/
TimeStamp() {
gettimeofday(&_ts,NULL);
}
/**
* @brief Destructor.
*/
~TimeStamp() {}
/**
* @brief Reset timestamp.
*
* Set timestamp value to current time.
*/
void reset()
{
gettimeofday(&_ts,NULL);
}
/**
* @brief Get timestamp value (= object creation or last reset time).
*
* @return Timestamp value in seconds.
*/
double getVal() const
{
return double(_ts.tv_sec)+double(_ts.tv_usec)/1000000.0;
}
/**
* @brief Get elapsed time (since object creation time).
*
* @return Elapsed time in seconds.
*/
double elapsed() const
{
struct timeval now;
gettimeofday(&now,NULL);
return double(now.tv_sec)-double(_ts.tv_sec)+
(double(now.tv_usec)-double(_ts.tv_usec))/1000000.0;
}
/**
* @brief Calculate difference between timestamps.
*
* @return Difference between timestamps in seconds.
*/
double operator-(const TimeStamp &other) const
{
return double(_ts.tv_sec)-double(other._ts.tv_sec)+
(double(_ts.tv_usec)-double(other._ts.tv_usec))/1000000.0;
}
};
} // namespace fsa
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