ceph/src/boost/libs/math/include_private/boost/math/tools/iteration_logger.hpp

   1 //  Copyright John Maddock 2014.
   2 //  Use, modification and distribution are subject to the
   3 //  Boost Software License, Version 1.0. (See accompanying file
   4 //  LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
   5
   6 #ifndef BOOST_MATH_TOOLS_ITERATION_LOGGER
   7 #define BOOST_MATH_TOOLS_ITERATION_LOGGER
   8
   9 #include <map>
  10 #include <string>
  11 #include <utility>
  12 #include <iostream>
  13 #include <iomanip>
  14 #include <fstream>
  15 #include <boost/current_function.hpp>
  16
  17 namespace boost{ namespace math{ namespace detail{
  18
  19 struct logger
  20 {
  21    std::map<std::pair<std::string, std::string>, unsigned long long> data;
  22
  23    ~logger()
  24    {
  25       for(std::map<std::pair<std::string, std::string>, unsigned long long>::const_iterator i = data.begin(); i != data.end(); ++i)
  26       {
  27          std::cout << "Logging iteration data:\n  file: " << i->first.first
  28             << "\n  function: " << i->first.second
  29             << "\n  count: " << i->second << std::endl;
  30          //
  31          // Read in existing data:
  32          //
  33          std::map<std::string, unsigned long long> file_data;
  34          std::string filename = i->first.first + ".logfile";
  35          std::ifstream is(filename.c_str());
  36          while(is.good())
  37          {
  38             std::string f;
  39             unsigned long long c;
  40             is >> std::ws;
  41             std::getline(is, f);
  42             is >> c;
  43             if(f.size())
  44                file_data[f] = c;
  45          }
  46          is.close();
  47          if(file_data.find(i->first.second) != file_data.end())
  48             file_data[i->first.second] += i->second;
  49          else
  50             file_data[i->first.second] = i->second;
  51          //
  52          // Write it out again:
  53          //
  54          std::ofstream os(filename.c_str());
  55          for(std::map<std::string, unsigned long long>::const_iterator j = file_data.begin(); j != file_data.end(); ++j)
  56             os << j->first << "\n    " << j->second << std::endl;
  57          os.close();
  58       }
  59    }
  60 };
  61
  62 inline void log_iterations(const char* file, const char* function, unsigned long long count)
  63 {
  64    static logger l;
  65    std::pair<std::string, std::string> key(file, function);
  66    if(l.data.find(key) == l.data.end())
  67       l.data[key] = 0;
  68    l.data[key] += count;
  69 }
  70
  71 #define BOOST_MATH_LOG_COUNT(count) boost::math::detail::log_iterations(__FILE__, BOOST_CURRENT_FUNCTION, count);
  72
  73
  74 }}} // namespaces
  75
  76 #endif // BOOST_MATH_TOOLS_ITERATION_LOGGER
  77