00001 /*!@file Util/fpe.C floating-point exceptions */ 00002 00003 // //////////////////////////////////////////////////////////////////// // 00004 // The iLab Neuromorphic Vision C++ Toolkit - Copyright (C) 2001 by the // 00005 // 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: Rob Peters <rjpeters@usc.edu> 00034 // $HeadURL: svn://isvn.usc.edu/software/invt/trunk/saliency/src/Util/fpe.C $ 00035 // $Id: fpe.C 6132 2006-01-20 22:59:25Z rjpeters $ 00036 // 00037 00038 #include "Util/fpe.H" 00039 00040 #ifdef HAVE_FEENABLEEXCEPT 00041 #include <fenv.h> 00042 #endif 00043 00044 namespace 00045 { 00046 bool isEnabled = false; 00047 bool isLocked = false; 00048 } 00049 00050 // ###################################################################### 00051 void fpExceptionsOn() 00052 { 00053 if (!isLocked) 00054 { 00055 // Removed: FE_UNDERFLOW as it crashes several classes incl. WinnerTakeAll 00056 #ifdef HAVE_FEENABLEEXCEPT 00057 feenableexcept(FE_DIVBYZERO | FE_INVALID | FE_OVERFLOW); 00058 #endif 00059 isEnabled = true; 00060 } 00061 } 00062 00063 // ###################################################################### 00064 void fpExceptionsOff() 00065 { 00066 if (!isLocked) 00067 { 00068 #ifdef HAVE_FEENABLEEXCEPT 00069 feclearexcept(FE_ALL_EXCEPT); 00070 fedisableexcept(FE_ALL_EXCEPT); 00071 #endif 00072 isEnabled = false; 00073 } 00074 } 00075 00076 // ###################################################################### 00077 void fpExceptionsLock() 00078 { 00079 isLocked = true; 00080 } 00081 00082 // ###################################################################### 00083 void fpExceptionsUnlock() 00084 { 00085 isLocked = false; 00086 } 00087 00088 // ###################################################################### 00089 bool fpIsEnabled() 00090 { 00091 return isEnabled; 00092 } 00093 00094 // ###################################################################### 00095 bool fpIsLocked() 00096 { 00097 return isLocked; 00098 } 00099 00100 // ###################################################################### 00101 /* So things look consistent in everyone's emacs... */ 00102 /* Local Variables: */ 00103 /* indent-tabs-mode: nil */ 00104 /* End: */