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Full Discussion: How to get uptime in miliseconds ?
Top Forums Programming How to get uptime in miliseconds ? Post 302579315 by Pufo on Monday 5th of December 2011 12:05:45 PM
Old 12-05-2011
Which do you think is faster:

jim mcnamara version, or mine ?

Code:
unsigned long ms_uptime()
{
   std::string script_loc, line;
   script_loc = "/proc/uptime";
   m_file.open(script_loc.c_str());

   if(m_file){

       getline(m_file, line);
       double param = atof(line.c_str());
       m_file.close();
 
       return param*1000;  
   } 
   return -1;
}

 

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LEARN ABOUT CENTOS

std::extreme_value_distribution

std::extreme_value_distribution< _RealType >(3) 	     Library Functions Manual		   std::extreme_value_distribution< _RealType >(3)

NAME

       std::extreme_value_distribution< _RealType > -

SYNOPSIS

   Classes
       struct param_type

   Public Types
       typedef _RealType result_type

   Public Member Functions
       extreme_value_distribution (_RealType __a=_RealType(0), _RealType __b=_RealType(1))
       extreme_value_distribution (const param_type &__p)
       template<typename _ForwardIterator , typename _UniformRandomNumberGenerator > void __generate (_ForwardIterator __f, _ForwardIterator __t,
	   _UniformRandomNumberGenerator &__urng)
       template<typename _ForwardIterator , typename _UniformRandomNumberGenerator > void __generate (_ForwardIterator __f, _ForwardIterator __t,
	   _UniformRandomNumberGenerator &__urng, const param_type &__p)
       template<typename _UniformRandomNumberGenerator > void __generate (result_type *__f, result_type *__t, _UniformRandomNumberGenerator
	   &__urng, const param_type &__p)
       _RealType a () const
       _RealType b () const
       result_type max () const
       result_type min () const
       template<typename _UniformRandomNumberGenerator > extreme_value_distribution
	   < _RealType >::result_type operator() (_UniformRandomNumberGenerator &__urng, const param_type &__p)"
       template<typename _UniformRandomNumberGenerator > result_type operator() (_UniformRandomNumberGenerator &__urng)
       template<typename _UniformRandomNumberGenerator > result_type operator() (_UniformRandomNumberGenerator &__urng, const param_type &__p)
       param_type param () const
       void param (const param_type &__param)
       void reset ()

   Friends
       bool operator== (const extreme_value_distribution &__d1, const extreme_value_distribution &__d2)

Detailed Description
   template<typename _RealType = double>class std::extreme_value_distribution< _RealType >
       A extreme_value_distribution random number distribution.

       The formula for the normal probability mass function is p(x|a,b) = ac{1}{b} xp( ac{a-x}{b} - xp(ac{a-x}{b})) ]

       Definition at line 5051 of file random.h.

Member Typedef Documentation
   template<typename _RealType = double> typedef _RealType std::extreme_value_distribution< _RealType >::result_type
       The type of the range of the distribution.

       Definition at line 5054 of file random.h.

Member Function Documentation
   template<typename _RealType = double> _RealType std::extreme_value_distribution< _RealType >::a () const [inline]
       Return the $a$ parameter of the distribution.

       Definition at line 5109 of file random.h.

   template<typename _RealType = double> _RealType std::extreme_value_distribution< _RealType >::b () const [inline]
       Return the $b$ parameter of the distribution.

       Definition at line 5116 of file random.h.

   template<typename _RealType = double> result_type std::extreme_value_distribution< _RealType >::max () const [inline]
       Returns the least upper bound value of the distribution.

       Definition at line 5145 of file random.h.

       References std::numeric_limits< _Tp >::max().

   template<typename _RealType = double> result_type std::extreme_value_distribution< _RealType >::min () const [inline]
       Returns the greatest lower bound value of the distribution.

       Definition at line 5138 of file random.h.

       References std::numeric_limits< _Tp >::lowest().

   template<typename _RealType = double> template<typename _UniformRandomNumberGenerator > result_type std::extreme_value_distribution< _RealType
       >::operator() (_UniformRandomNumberGenerator &__urng) [inline]
       Generating functions.

       Definition at line 5153 of file random.h.

   template<typename _RealType = double> param_type std::extreme_value_distribution< _RealType >::param () const [inline]
       Returns the parameter set of the distribution.

       Definition at line 5123 of file random.h.

       Referenced by std::operator>>().

   template<typename _RealType = double> void std::extreme_value_distribution< _RealType >::param (const param_type &__param) [inline]
       Sets the parameter set of the distribution.

       Parameters:
	   __param The new parameter set of the distribution.

       Definition at line 5131 of file random.h.

   template<typename _RealType = double> void std::extreme_value_distribution< _RealType >::reset () [inline]
       Resets the distribution state.

       Definition at line 5102 of file random.h.

Friends And Related Function Documentation
   template<typename _RealType = double> bool operator== (const extreme_value_distribution< _RealType > &__d1, const extreme_value_distribution<
       _RealType > &__d2) [friend]
       Return true if two extreme value distributions have the same parameters.

       Definition at line 5188 of file random.h.

Author
       Generated automatically by Doxygen for libstdc++ from the source code.

libstdc++							  Tue Jun 10 2014		   std::extreme_value_distribution< _RealType >(3)
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