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285 lines
6.6 KiB
C++
285 lines
6.6 KiB
C++
// Copyright (c) 2006-2013, Andrey N. Sabelnikov, www.sabelnikov.net
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// All rights reserved.
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//
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are met:
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// * Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above copyright
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// notice, this list of conditions and the following disclaimer in the
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// documentation and/or other materials provided with the distribution.
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// * Neither the name of the Andrey N. Sabelnikov nor the
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// names of its contributors may be used to endorse or promote products
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// derived from this software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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// ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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// WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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// DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER BE LIABLE FOR ANY
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// DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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// (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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// LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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// ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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// SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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//
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#pragma once
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#include <list>
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#include <numeric>
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#include <boost/timer.hpp>
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#include <boost/uuid/uuid.hpp>
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#include <boost/uuid/random_generator.hpp>
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#include "misc_os_dependent.h"
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#include "syncobj.h"
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namespace epee
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{
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namespace math_helper
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{
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template<typename val, int default_base>
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class average
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{
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public:
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average()
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{
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m_base = default_base;
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m_last_avg_val = 0;
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}
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bool set_base()
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{
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CRITICAL_REGION_LOCAL(m_lock);
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m_base = default_base;
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if(m_list.size() > m_base)
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m_list.resize(m_base);
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return true;
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}
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typedef val value_type;
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void push(const value_type& vl)
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{
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CRITICAL_REGION_LOCAL(m_lock);
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//#ifndef DEBUG_STUB
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m_list.push_back(vl);
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if(m_list.size() > m_base )
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m_list.pop_front();
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//#endif
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}
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double update(const value_type& vl)
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{
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CRITICAL_REGION_LOCAL(m_lock);
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//#ifndef DEBUG_STUB
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push(vl);
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//#endif
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return get_avg();
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}
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double get_avg()
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{
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CRITICAL_REGION_LOCAL(m_lock);
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value_type vl = std::accumulate(m_list.begin(), m_list.end(), value_type(0));
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if(m_list.size())
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return m_last_avg_val = (double)(vl/m_list.size());
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return m_last_avg_val = (double)vl;
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}
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value_type get_last_val()
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{
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CRITICAL_REGION_LOCAL(m_lock);
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if(m_list.size())
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return m_list.back();
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return 0;
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}
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private:
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unsigned int m_base;
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double m_last_avg_val;
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std::list<value_type> m_list;
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critical_section m_lock;
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};
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#ifdef WINDOWS_PLATFORM
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/************************************************************************/
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/* */
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/************************************************************************/
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class timing_guard_base
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{
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public:
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virtual ~timing_guard_base(){};
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};
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template<class T>
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class timing_guard: public timing_guard_base
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{
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public:
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timing_guard(T& avrg):m_avrg(avrg)
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{
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m_start_ticks = ::GetTickCount();
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}
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~timing_guard()
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{
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m_avrg.push(::GetTickCount()-m_start_ticks);
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}
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private:
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T& m_avrg;
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DWORD m_start_ticks;
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};
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template<class t_timing>
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timing_guard_base* create_timing_guard(t_timing& timing){return new timing_guard<t_timing>(timing);}
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#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));
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#define END_TIMING_ZONE() }
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#endif
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//#ifdef WINDOWS_PLATFORM_EX
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template<uint64_t default_time_window>
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class speed
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{
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public:
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speed()
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{
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m_time_window = default_time_window;
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m_last_speed_value = 0;
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}
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bool chick()
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{
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#ifndef DEBUG_STUB
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uint64_t ticks = misc_utils::get_tick_count();
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CRITICAL_REGION_BEGIN(m_lock);
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m_chicks.push_back(ticks);
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CRITICAL_REGION_END();
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//flush(ticks);
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#endif
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return true;
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}
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bool chick(size_t count)
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{
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for(size_t s = 0; s != count; s++)
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chick();
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return true;
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}
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size_t get_speed()
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{
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flush(misc_utils::get_tick_count());
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return m_last_speed_value = m_chicks.size();
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}
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private:
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bool flush(uint64_t ticks)
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{
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CRITICAL_REGION_BEGIN(m_lock);
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std::list<uint64_t>::iterator it = m_chicks.begin();
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while(it != m_chicks.end())
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{
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if(*it + m_time_window < ticks)
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m_chicks.erase(it++);
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else
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break;
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}
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CRITICAL_REGION_END();
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return true;
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}
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std::list<uint64_t> m_chicks;
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uint64_t m_time_window;
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size_t m_last_speed_value;
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critical_section m_lock;
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};
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//#endif
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template<class tlist>
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void randomize_list(tlist& t_list)
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{
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for(typename tlist::iterator it = t_list.begin();it!=t_list.end();it++)
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{
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size_t offset = rand()%t_list.size();
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typename tlist::iterator it_2 = t_list.begin();
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for(size_t local_offset = 0;local_offset!=offset;local_offset++)
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it_2++;
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if(it_2 == it)
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continue;
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std::swap(*it_2, *it);
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}
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}
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template<uint64_t scale, int default_interval, bool start_immediate = true>
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class once_a_time
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{
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uint64_t get_time() const
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{
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#ifdef _WIN32
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FILETIME fileTime;
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GetSystemTimeAsFileTime(&fileTime);
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unsigned __int64 present = 0;
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present |= fileTime.dwHighDateTime;
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present = present << 32;
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present |= fileTime.dwLowDateTime;
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present /= 10; // mic-sec
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#else
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struct timeval tv;
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gettimeofday(&tv, NULL);
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return tv.tv_sec * 1000000 + tv.tv_usec;
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#endif
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}
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public:
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once_a_time():m_interval(default_interval * scale)
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{
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m_last_worked_time = 0;
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if(!start_immediate)
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m_last_worked_time = get_time();
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}
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template<class functor_t>
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bool do_call(functor_t functr)
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{
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uint64_t current_time = get_time();
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if(current_time - m_last_worked_time > m_interval)
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{
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bool res = functr();
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m_last_worked_time = get_time();
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return res;
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}
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return true;
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}
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private:
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uint64_t m_last_worked_time;
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uint64_t m_interval;
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};
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template<int default_interval, bool start_immediate = true>
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class once_a_time_seconds: public once_a_time<1000000, default_interval, start_immediate> {};
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template<int default_interval, bool start_immediate = true>
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class once_a_time_milliseconds: public once_a_time<1000, default_interval, start_immediate> {};
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}
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}
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