timeaccumulate.hxx

这是国外的resip协议栈

#ifndef TimeAccumulate_hxx
#define TimeAccumulate_hxx

#include <map>

#include "rutil/Data.hxx"
#include "rutil/Lock.hxx"
#include "rutil/Mutex.hxx"
#include "rutil/Timer.hxx"

namespace resip
{

/**
   Accumulates time and count by distinct string.
   The data is available statically.
   Use class::method as the key when possible to avoid collision.
*/
class TimeAccumulate
{
   private:
      struct Accumulator
      {
            UInt64 totalTime;
            size_t count;
      };

   public:
#if 1
      TimeAccumulate(const Data& name)
         : mName(name),
           mStart(Timer::getTimeMs())
      {}

      ~TimeAccumulate()
      {
         UInt64 end = Timer::getTimeMs();
         end -= mStart;
         Lock lock(TimeAccumulate::mMutex);

         Accumulator& acc = TimeAccumulate::mTimes[mName];
         acc.count += 1;
         acc.totalTime += end;
      }
#else
      TimeAccumulate(const char* chars)
         : mName(Data::Empty),
           mStart(0)
      {}

      TimeAccumulate(const Data& name)
         : mName(Data::Empty),
           mStart(0)
      {}

      ~TimeAccumulate()
      {
      }
#endif
      
      static UInt64 getTime(const Data& name)
      {
         Lock lock(TimeAccumulate::mMutex);
         return TimeAccumulate::mTimes[name].totalTime;
      }
      
      static size_t getCount(const Data& name)
      {
         Lock lock(TimeAccumulate::mMutex);
         return TimeAccumulate::mTimes[name].count;
      }

      static void dump();
      static void clear();

      class Guard
      {
         public:
            explicit Guard(UInt64& accumulator)
               : mAccumulator(accumulator)
            {
               mAccumulator -= Timer::getTimeMs();
            }
            ~Guard()
            {
               mAccumulator += Timer::getTimeMs();
            }

         private:
            UInt64& mAccumulator;
      };

   private:
      typedef std::map<Data, Accumulator> TimeMap;

      const Data mName;
      const UInt64 mStart;

      static Mutex mMutex;
      static TimeMap mTimes;
};

}
#endif

/* ====================================================================
 * The Vovida Software License, Version 1.0 
 * 
 * Copyright (c) 2000 Vovida Networks, Inc.  All rights reserved.
 * 
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 
 * 2. 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.
 * 
 * 3. The names "VOCAL", "Vovida Open Communication Application Library",
 *    and "Vovida Open Communication Application Library (VOCAL)" must
 *    not be used to endorse or promote products derived from this
 *    software without prior written permission. For written
 *    permission, please contact [e-mail].
 *
 * 4. Products derived from this software may not be called "VOCAL", nor
 *    may "VOCAL" appear in their name, without prior written
 *    permission of Vovida Networks, Inc.
 * 
 * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESSED OR IMPLIED
 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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 * 
 * ====================================================================
 * 
 * This software consists of voluntary contributions made by Vovida
 * Networks, Inc. and many individuals on behalf of Vovida Networks,
 * Inc.  For more information on Vovida Networks, Inc., please see
 * <http://www.vovida.org/>.
 *
 */