// Copyright (c) 2006-2013, Andrey N. Sabelnikov, www.sabelnikov.net
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above copyright
// notice, this list of conditions and the following disclaimer in the
// documentation and/or other materials provided with the distribution.
// * Neither the name of the Andrey N. Sabelnikov nor the
// names of its contributors may be used to endorse or promote products
// derived from this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
// ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
// WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
// DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER BE LIABLE FOR ANY
// DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
// (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
// LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
// ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
// SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
//
#pragma once
#include <list>
#include <numeric>
#include <boost/timer.hpp>
#include <boost/uuid/uuid.hpp>
#include <boost/uuid/random_generator.hpp>
#include "misc_os_dependent.h"
namespace epee
{
namespace math_helper
{
template<typename val, int default_base>
class average
{
public:
average()
{
m_base = default_base;
m_last_avg_val = 0;
}
bool set_base()
{
CRITICAL_REGION_LOCAL(m_lock);
m_base = default_base;
if(m_list.size() > m_base)
m_list.resize(m_base);
return true;
}
typedef val value_type;
void push(const value_type& vl)
{
CRITICAL_REGION_LOCAL(m_lock);
//#ifndef DEBUG_STUB
m_list.push_back(vl);
if(m_list.size() > m_base )
m_list.pop_front();
//#endif
}
double update(const value_type& vl)
{
CRITICAL_REGION_LOCAL(m_lock);
//#ifndef DEBUG_STUB
push(vl);
//#endif
return get_avg();
}
double get_avg()
{
CRITICAL_REGION_LOCAL(m_lock);
value_type vl = std::accumulate(m_list.begin(), m_list.end(), value_type(0));
if(m_list.size())
return m_last_avg_val = (double)(vl/m_list.size());
return m_last_avg_val = (double)vl;
}
value_type get_last_val()
{
CRITICAL_REGION_LOCAL(m_lock);
if(m_list.size())
return m_list.back();
return 0;
}
private:
unsigned int m_base;
double m_last_avg_val;
std::list<value_type> m_list;
critical_section m_lock;
};
#ifdef WINDOWS_PLATFORM
/************************************************************************/
/* */
/************************************************************************/
class timing_guard_base
{
public:
virtual ~timing_guard_base(){};
};
template<class T>
class timing_guard: public timing_guard_base
{
public:
timing_guard(T& avrg):m_avrg(avrg)
{
m_start_ticks = ::GetTickCount();
}
~timing_guard()
{
m_avrg.push(::GetTickCount()-m_start_ticks);
}
private:
T& m_avrg;
DWORD m_start_ticks;
};
template<class t_timing>
timing_guard_base* create_timing_guard(t_timing& timing){return new timing_guard<t_timing>(timing);}
#define BEGIN_TIMING_ZONE(timing_var) { boost::shared_ptr<math_helper::timing_guard_base> local_timing_guard_ptr(math_helper::create_timing_guard(timing_var));
#define END_TIMING_ZONE() }
#endif
//#ifdef WINDOWS_PLATFORM_EX
template<uint64_t default_time_window>
class speed
{
public:
speed()
{
m_time_window = default_time_window;
m_last_speed_value = 0;
}
bool chick()
{
#ifndef DEBUG_STUB
uint64_t ticks = misc_utils::get_tick_count();
CRITICAL_REGION_BEGIN(m_lock);
m_chicks.push_back(ticks);
CRITICAL_REGION_END();
//flush(ticks);
#endif
return true;
}
bool chick(size_t count)
{
for(size_t s = 0; s != count; s++)
chick();
return true;
}
size_t get_speed()
{
flush(misc_utils::get_tick_count());
return m_last_speed_value = m_chicks.size();
}
private:
bool flush(uint64_t ticks)
{
CRITICAL_REGION_BEGIN(m_lock);
std::list<uint64_t>::iterator it = m_chicks.begin();
while(it != m_chicks.end())
{
if(*it + m_time_window < ticks)
m_chicks.erase(it++);
else
break;
}
CRITICAL_REGION_END();
return true;
}
std::list<uint64_t> m_chicks;
uint64_t m_time_window;
size_t m_last_speed_value;
critical_section m_lock;
};
//#endif
template<class tlist>
void randomize_list(tlist& t_list)
{
for(typename tlist::iterator it = t_list.begin();it!=t_list.end();it++)
{
size_t offset = rand()%t_list.size();
typename tlist::iterator it_2 = t_list.begin();
for(size_t local_offset = 0;local_offset!=offset;local_offset++)
it_2++;
if(it_2 == it)
continue;
std::swap(*it_2, *it);
}
}
PRAGMA_WARNING_PUSH
PRAGMA_GCC("GCC diagnostic ignored \"-Wstrict-aliasing\"")
inline
uint64_t generated_random_uint64()
{
boost::uuids::uuid id___ = boost::uuids::random_generator()();
return *reinterpret_cast<uint64_t*>(&id___.data[0]); //(*reinterpret_cast<uint64_t*>(&id___.data[0]) ^ *reinterpret_cast<uint64_t*>(&id___.data[8]));
}
PRAGMA_WARNING_POP
template<int default_interval, bool start_immediate = true>
class once_a_time_seconds
{
public:
once_a_time_seconds():m_interval(default_interval)
{
m_last_worked_time = 0;
if(!start_immediate)
time(&m_last_worked_time);
}
template<class functor_t>
bool do_call(functor_t functr)
{
time_t current_time = 0;
time(¤t_time);
if(current_time - m_last_worked_time > m_interval)
{
bool res = functr();
time(&m_last_worked_time);
return res;
}
return true;
}
private:
time_t m_last_worked_time;
time_t m_interval;
};
}
}
