SimEventBuffer.C

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00001 /*!@file Simulation/SimEventBuffer.C */
00002 
00003 // //////////////////////////////////////////////////////////////////// //
00004 // The iLab Neuromorphic Vision C++ Toolkit - Copyright (C) 2000-2005   //
00005 // by the University of Southern California (USC) and the iLab at USC.  //
00006 // See http://iLab.usc.edu for information about this project.          //
00007 // //////////////////////////////////////////////////////////////////// //
00008 // Major portions of the iLab Neuromorphic Vision Toolkit are protected //
00009 // under the U.S. patent ``Computation of Intrinsic Perceptual Saliency //
00010 // in Visual Environments, and Applications'' by Christof Koch and      //
00011 // Laurent Itti, California Institute of Technology, 2001 (patent       //
00012 // pending; application number 09/912,225 filed July 23, 2001; see      //
00013 // http://pair.uspto.gov/cgi-bin/final/home.pl for current status).     //
00014 // //////////////////////////////////////////////////////////////////// //
00015 // This file is part of the iLab Neuromorphic Vision C++ Toolkit.       //
00016 //                                                                      //
00017 // The iLab Neuromorphic Vision C++ Toolkit is free software; you can   //
00018 // redistribute it and/or modify it under the terms of the GNU General  //
00019 // Public License as published by the Free Software Foundation; either  //
00020 // version 2 of the License, or (at your option) any later version.     //
00021 //                                                                      //
00022 // The iLab Neuromorphic Vision C++ Toolkit is distributed in the hope  //
00023 // that it will be useful, but WITHOUT ANY WARRANTY; without even the   //
00024 // implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR      //
00025 // PURPOSE.  See the GNU General Public License for more details.       //
00026 //                                                                      //
00027 // You should have received a copy of the GNU General Public License    //
00028 // along with the iLab Neuromorphic Vision C++ Toolkit; if not, write   //
00029 // to the Free Software Foundation, Inc., 59 Temple Place, Suite 330,   //
00030 // Boston, MA 02111-1307 USA.                                           //
00031 // //////////////////////////////////////////////////////////////////// //
00032 //
00033 // Primary maintainer for this file: Pezhman Firoozfam (pezhman.firoozfam@usc.edu)
00034 // $HeadURL$ svn://isvn.usc.edu/software/invt/trunk/saliency/src/Simulation/SimEventBuffer.C
00035 //
00036 
00037 #include "Simulation/SimEventBuffer.H"
00038 
00039 //Define the inst function name
00040 SIMMODULEINSTFUNC(SimEventBuffer);
00041 
00042 SimEventBuffer* SimEventBuffer::pThis = NULL;
00043 
00044 SimEventBuffer::SimEventBuffer(OptionManager& mgr,
00045                                const std::string& descrName,
00046                                const std::string& tagName) :
00047   SimModule(mgr, descrName, tagName),
00048   SIMCALLBACK_INIT(SimEventClockTick)
00049 {
00050   if (pThis != NULL) LFATAL("Only one instance of SimEventBuffer can be created");
00051 
00052   pThis = this;
00053 
00054   pthread_mutex_t init = PTHREAD_MUTEX_INITIALIZER;
00055   buffer_access_mutex = init;
00056 }
00057 
00058 SimEventBuffer::~SimEventBuffer()
00059 {
00060   pThis = NULL;
00061 }
00062 
00063 rutz::shared_ptr<SimEvent> SimEventBuffer::asyncRetrieve()
00064 {
00065   GVX_MUTEX_LOCK(&buffer_access_mutex);
00066   if (buffer.empty()) return rutz::shared_ptr<SimEvent>();
00067 
00068   rutz::shared_ptr<SimEvent> event = buffer.front();
00069   buffer.pop();
00070   return event;
00071 }
00072 
00073 void SimEventBuffer::onSimEventClockTick(SimEventQueue& q,
00074                                          rutz::shared_ptr<SimEventClockTick>& e)
00075 {
00076   for (rutz::shared_ptr<SimEvent> event = SimEventBuffer::asyncRetrieve();
00077        event.is_valid();
00078        event = SimEventBuffer::asyncRetrieve())
00079   {
00080     q.post(event);
00081   }
00082 }
00083 
00084 // ######################################################################
00085 /* So things look consistent in everyone's emacs... */
00086 /* Local Variables: */
00087 /* mode: c++ */
00088 /* indent-tabs-mode: nil */
00089 /* End: */
00090 
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