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ELmap.cc

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// ----------------------------------------------------------------------
//
// ELmap.cc
//
// Change History:
//   99-06-10   mf      correction in sense of comparison between timespan
//                      and diff (now, lastTime)
//              mf      ELcountTRACE made available
//   99-06-11   mf      Corrected logic for suppressing output when n > limit
//                      but not but a factor of 2**K
//   06-05-16   mf      Added code to establish interval and to use skipped
//                      and interval when determinine in add() whehter to react
//
// ----------------------------------------------------------------------


#include "FWCore/MessageLogger/interface/ELmap.h"

// Possible traces
//#include <iostream>
//#define ELcountTRACE
// #define ELmapDumpTRACE


namespace edm
{


// ----------------------------------------------------------------------
// LimitAndTimespan:
// ----------------------------------------------------------------------

LimitAndTimespan::LimitAndTimespan( int lim, int ts, int ivl )
: limit   ( lim )
, timespan( ts )
, interval( ivl )
{ }


// ----------------------------------------------------------------------
// CountAndLimit:
// ----------------------------------------------------------------------

CountAndLimit::CountAndLimit( int lim, int ts, int ivl )
: n         ( 0 )
, aggregateN( 0 )
, lastTime  ( time(0) )
, limit     ( lim )
, timespan  ( ts  )
, interval  ( ivl )
, skipped   ( ivl-1 )  // So that the FIRST of the prescaled messages emerges
{ }


bool  CountAndLimit::add()  {

  time_t  now = time(0);

#ifdef ELcountTRACE
  std::cerr << "&&&--- CountAndLimit::add \n";
  std::cerr << "&&&    Time now  is " << now << "\n";
  std::cerr << "&&&    Last time is " << lastTime << "\n";
  std::cerr << "&&&    timespan  is " << timespan << "\n";
  std::cerr << "&&&    difftime  is " << difftime( now, lastTime ) << "\n"
                                << std::flush;
#endif

  // Has it been so long that we should restart counting toward the limit?
  if ( (timespan >= 0)
            &&
        (difftime(now, lastTime) >= timespan) )  {
     n = 0;
     if ( interval > 0 ) {
       skipped = interval - 1; // So this message will be reacted to
     } else {
       skipped = 0;
     }
  }

  lastTime = now;

  ++n;  
  ++aggregateN;
  ++skipped;  

#ifdef ELcountTRACE
  std::cerr << "&&&       n is " << n << "-- limit is    " << limit    << "\n";
  std::cerr << "&&& skipped is " << skipped 
                                      << "-- interval is " << interval << "\n";
#endif
  
  if (skipped < interval) return false;

  if ( limit == 0 ) return false;        // Zero limit - never react to this
  if ( (limit < 0)  || ( n <= limit )) {
    skipped = 0;
    return true;
  }
  
  // Now we are over the limit - have we exceeded limit by 2^N * limit?
  long  diff = n - limit;
  long  r = diff/limit;
  if ( r*limit != diff ) { // Not a multiple of limit - don't react
    return false;
  }  
  if ( r == 1 )   {     // Exactly twice limit - react
    skipped = 0;
    return true;
  }

  while ( r > 1 )  {
    if ( (r & 1) != 0 )  return false;  // Not 2**n times limit - don't react
    r >>= 1;
  }
  // If you never get an odd number till one, r is 2**n so react
  
  skipped = 0;
  return true;

}  // add()


// ----------------------------------------------------------------------
// StatsCount:
// ----------------------------------------------------------------------

StatsCount::StatsCount()
: n          ( 0 )
, aggregateN ( 0 )
, ignoredFlag( false )
, context1   ( "" )
, context2   ( "" )
, contextLast( "" )
{ }


void  StatsCount::add( const ELstring & context, bool reactedTo )  {

  ++n;  ++aggregateN;

  ( (1 == n) ? context1
  : (2 == n) ? context2
  :            contextLast
  )                        = ELstring( context, 0, 16 );

  if ( ! reactedTo )
    ignoredFlag = true;

}  // add()


// ----------------------------------------------------------------------

#ifdef ELmapDumpTRACE
// ----------------------------------------------------------------------
// Global Dump methods (useful for debugging)
// ----------------------------------------------------------------------

#include <sstream>
#include <string.h>

char *  ELmapDump ( ELmap_limits m )  {

  std::ostringstream s;
  s << "**** ELmap_limits Dump **** \n";

  ELmap_limits::const_iterator i;
  for ( i = m.begin();  i != m.end();  ++i )  {
    LimitAndTimespan lt = (*i).second;
    s << "     " << (*i).first << ":  " << lt.limit << ", " <<
                lt.timespan << "\n";
  }
  s << "--------------------------------------------\n";

  char *  dump = new char[s.str().size()+1];
  strcpy( dump, s.str().c_str() );

  return dump;

}
#endif

} // end of namespace edm  */

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