the begginning

dmlproc/dmlresultbuffer.h

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+/* Copyright (C) 2014 InfiniDB, Inc.
+
+   This program is free software; you can redistribute it and/or
+   modify it under the terms of the GNU General Public License
+   as published by the Free Software Foundation; version 2 of
+   the License.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
+   MA 02110-1301, USA. */
+
+/***********************************************************************
+*   $Id: dmlresultbuffer.h 927 2013-01-21 14:11:25Z rdempsey $
+*
+*
+***********************************************************************/
+/** @file */
+
+#ifndef DMLRESULTBUFFER_H
+#define DMLRESULTBUFFER_H
+#include <deque>
+#include <boost/thread/thread.hpp>
+#include <boost/thread/mutex.hpp>
+#include "dmlpackageprocessor.h"
+
+namespace dmlprocessor
+{
+/** @brief holds dml results
+  */
+class DMLResultBuffer
+{
+public:
+    typedef boost::mutex::scoped_lock scoped_lock;
+
+    /** @brief the type of a <DMLResult, sessionID> pair
+      *
+      */
+    struct ResultPair
+    {
+        dmlpackageprocessor::DMLPackageProcessor::DMLResult result;
+        int sessionID;
+    };
+
+    /** @brief ctor
+      */	
+    DMLResultBuffer();
+	
+    /** @brief ctor
+      *
+      */
+    DMLResultBuffer(int bufferSize);
+
+    /** @brief dtor
+      *
+      */
+    ~DMLResultBuffer();
+	
+    /** @brief set the size of the buffer
+      *
+      * @param bufferSize the size of the buffer
+      */
+    inline void setBufferSize(int bufferSize) {fBufferSize=bufferSize;}
+	
+    /** @brief put results in the buffer
+      *
+      */
+    void put( dmlpackageprocessor::DMLPackageProcessor::DMLResult result, int sessionID );
+
+    /** @brief get results from the buffer
+      *
+      */
+    ResultPair get();
+
+private:
+    boost::mutex fMutex;
+    boost::condition fCond;
+
+    typedef std::deque<ResultPair> ResultBuffer;
+    ResultBuffer fResultBuffer;
+
+    int fBufferSize;
+    int fFull;
+};
+
+} //namespace dmlprocessor
+
+#endif //DMLRESULTPROCESSOR_H