StatisticsDb.cxx
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上传日期:2013-07-25
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- /* ====================================================================
- * 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 vocal@vovida.org.
- *
- * 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
- * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, TITLE AND
- * NON-INFRINGEMENT ARE DISCLAIMED. IN NO EVENT SHALL VOVIDA
- * NETWORKS, INC. OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT DAMAGES
- * IN EXCESS OF $1,000, NOR FOR ANY INDIRECT, INCIDENTAL, SPECIAL,
- * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
- * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
- * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
- * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
- * USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
- * DAMAGE.
- *
- * ====================================================================
- *
- * This software consists of voluntary contributions made by Vovida
- * Networks, Inc. and many individuals on behalf of Vovida Networks,
- * Inc. For more information on Vovida Networks, Inc., please see
- * <http://www.vovida.org/>.
- *
- */
- static const char* const StatisticsDb_cxx_Version =
- "$Id: StatisticsDb.cxx,v 1.5 2001/03/23 19:43:21 icahoon Exp $";
- #include "StatisticsDb.hxx"
- #include "Statistic.hxx"
- #include "Lock.hxx"
- #include <cassert>
- using Vocal::Statistics::StatisticsDb;
- using Vocal::Statistics::StatisticsDbKey;
- using Vocal::Statistics::Statistic;
- using Vocal::Threads::WriteLock;
- using Vocal::Threads::ReadLock;
- const StatisticsDbKey Vocal::Statistics::INVALID_STAT_DB_KEY = 0;
- StatisticsDb::StatisticsDb(const char * name)
- : myName(name ? name : "StatisticsDb"),
- myNextKey(INVALID_STAT_DB_KEY+1)
- {
- myStatNames.push_back(Data("INVALID_STAT_DB_KEY"));
- }
- StatisticsDb::~StatisticsDb()
- {
- clear();
- }
- StatisticsDbKey
- StatisticsDb::key(const Data & key)
- {
- WriteLock lock(myLock);
-
- StatisticsDbKey result = INVALID_STAT_DB_KEY;
- StatisticRegistrations::iterator regIter;
- regIter = myStatRegistrations.find(key);
-
- if ( regIter == myStatRegistrations.end() )
- {
- result = myStatRegistrations[key] = myNextKey++;
- myStatNames.push_back(key);
-
- assert( myStatNames.size() == myNextKey );
- }
- else
- {
- result = regIter->second;
- }
-
- return ( result );
- }
- const Data &
- StatisticsDb::keyName(StatisticsDbKey index) const
- {
- ReadLock lock(myLock);
-
- if ( index > myStatNames.size() )
- {
- assert( index <= myStatNames.size() );
- index = INVALID_STAT_DB_KEY;
- }
-
- return ( myStatNames[index] );
- }
- StatisticsDbKey
- StatisticsDb::nextKey() const
- {
- return ( myNextKey );
- }
- void
- StatisticsDb::record(const Statistic & statistic)
- {
- if ( !(statistic.db() == *this) )
- {
- assert( statistic.db() == *this );
- return;
- }
- WriteLock lock(myLock);
-
- StatisticsDbKey key = statistic.key();
-
- Database::iterator dbIter = m_db.find(key);
-
- if ( dbIter == m_db.end() )
- {
- // Memory allocation
- //
- m_db[key] = statistic.copy();
- }
- else
- {
- dbIter->second->combine(statistic);
- }
- }
- Statistic *
- StatisticsDb::find(const Statistic & statistic) const
- {
- Statistic * result = 0;
-
- if ( !(statistic.db() == *this) )
- {
- assert( statistic.db() == *this );
- return ( result );
- }
- ReadLock lock(myLock);
- Database::const_iterator dbIter = m_db.find(statistic.key());
-
- if ( dbIter != m_db.end() )
- {
- result = dbIter->second;
- }
-
- return ( result );
- }
- void
- StatisticsDb::erase(const Statistic & statistic)
- {
- if ( !(statistic.db() == *this) )
- {
- assert( statistic.db() == *this );
- return;
- }
- WriteLock lock(myLock);
- Database::iterator dbIter = m_db.find(statistic.key());
-
- if ( dbIter != m_db.end() )
- {
- // Memory freed
- //
- delete dbIter->second;
- m_db.erase(dbIter);
- }
-
- return;
- }
- void
- StatisticsDb::clear()
- {
- WriteLock lock(myLock);
- for ( Database::iterator dbIter = m_db.begin();
- dbIter != m_db.end();
- dbIter++
- )
- {
- // Memory freed
- //
- delete dbIter->second;
- }
- m_db.clear();
- }
- ostream &
- StatisticsDb::writeTo(ostream & out) const
- {
- ReadLock lock(myLock);
- out << 'n' << myName.getData() << 'n';
-
- for ( Database::const_iterator dbIter = m_db.begin();
- dbIter != m_db.end();
- dbIter++
- )
- {
- out << *(dbIter->second) << 'n';
- }
-
- return ( out );
- }
- const Data &
- StatisticsDb::name() const
- {
- return ( myName );
- }
- bool
- StatisticsDb::operator==(const StatisticsDb & src) const
- {
- return ( this == &src );
- }
- bool
- StatisticsDb::operator<(const StatisticsDb & src) const
- {
- return ( this < &src );
- }