OPeNDAP Hyrax Back End Server (BES)
Updated for version 3.8.3
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00001 // BESMemoryGlobalArea.h 00002 00003 // This file is part of bes, A C++ back-end server implementation framework 00004 // for the OPeNDAP Data Access Protocol. 00005 00006 // Copyright (c) 2004-2009 University Corporation for Atmospheric Research 00007 // Author: Patrick West <pwest@ucar.edu> and Jose Garcia <jgarcia@ucar.edu> 00008 // 00009 // This library is free software; you can redistribute it and/or 00010 // modify it under the terms of the GNU Lesser General Public 00011 // License as published by the Free Software Foundation; either 00012 // version 2.1 of the License, or (at your option) any later version. 00013 // 00014 // This library is distributed in the hope that it will be useful, 00015 // but WITHOUT ANY WARRANTY; without even the implied warranty of 00016 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 00017 // Lesser General Public License for more details. 00018 // 00019 // You should have received a copy of the GNU Lesser General Public 00020 // License along with this library; if not, write to the Free Software 00021 // Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 00022 // 00023 // You can contact University Corporation for Atmospheric Research at 00024 // 3080 Center Green Drive, Boulder, CO 80301 00025 00026 // (c) COPYRIGHT University Corporation for Atmospheric Research 2004-2005 00027 // Please read the full copyright statement in the file COPYRIGHT_UCAR. 00028 // 00029 // Authors: 00030 // pwest Patrick West <pwest@ucar.edu> 00031 // jgarcia Jose Garcia <jgarcia@ucar.edu> 00032 00033 #ifndef BESMemoryGlobalArea_h_ 00034 #define BESMemoryGlobalArea_h_ 1 00035 00036 #include <sys/resource.h> 00037 00038 #include "BESObj.h" 00039 00040 #define MEGABYTE 1024*1024 00041 00042 class BESMemoryGlobalArea : public BESObj 00043 { 00044 struct rlimit limit ; 00045 static unsigned long _size ; 00046 static int _counter ; 00047 static void *_buffer ; 00048 00049 unsigned long megabytes( unsigned int s ) 00050 { 00051 return s*MEGABYTE ; 00052 } 00053 void log_limits( const string &msg ) ; 00054 00055 public: 00056 BESMemoryGlobalArea() ; 00057 ~BESMemoryGlobalArea() ; 00058 00059 void release_memory() ; 00060 bool reclaim_memory() ; 00061 unsigned long SizeOfEmergencyPool() { return _size; } 00062 00063 virtual void dump( ostream &strm ) const ; 00064 }; 00065 00066 #endif // BESMemoryGlobalArea_h_ 00067