00001 /*---------------------------------------------------------------------------*\ 00002 ========= | 00003 \\ / F ield | OpenFOAM: The Open Source CFD Toolbox 00004 \\ / O peration | 00005 \\ / A nd | Copyright (C) 1991-2010 OpenCFD Ltd. 00006 \\/ M anipulation | 00007 ------------------------------------------------------------------------------- 00008 License 00009 This file is part of OpenFOAM. 00010 00011 OpenFOAM is free software: you can redistribute it and/or modify it 00012 under the terms of the GNU General Public License as published by 00013 the Free Software Foundation, either version 3 of the License, or 00014 (at your option) any later version. 00015 00016 OpenFOAM is distributed in the hope that it will be useful, but WITHOUT 00017 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 00018 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 00019 for more details. 00020 00021 You should have received a copy of the GNU General Public License 00022 along with OpenFOAM. If not, see <http://www.gnu.org/licenses/>. 00023 00024 Class 00025 Foam::sigFpeImpl 00026 00027 Description 00028 Set up trapping for floating point exceptions (signal FPE). 00029 00030 Controlled by two env vars: 00031 @param FOAM_SIGFPE \n 00032 exception trapping 00033 @param FOAM_SETNAN \n 00034 initialization of all malloced memory to NaN. If FOAM_SIGFPE 00035 also set, this will cause usage of uninitialized scalars to trigger 00036 an abort. 00037 00038 This is the platform specific opaque implementation for class sigFpe. 00039 00040 SourceFiles 00041 sigFpeImpl.C 00042 00043 \*---------------------------------------------------------------------------*/ 00044 00045 #ifndef sigFpeImpl_H 00046 #define sigFpeImpl_H 00047 00048 #include <OpenFOAM/OSspecific.H> 00049 #include "FOAMConfig.h" 00050 #include <signal.h> 00051 00052 #if (defined(FOAM_HAVE_FENV_H) && defined(FOAM_HAVE_FEENABLEEXCEPT)) || \ 00053 (defined(FOAM_HAVE_SIGFPE_H) && defined(FOAM_HAVE_HANDLE_SIGFPES)) 00054 # define FOAM_USE_FPE_HANDLING 00055 #endif 00056 00057 #if defined(FOAM_HAVE_MALLOC_HOOK) && defined(FOAM_USE_FPE_HANDLING) 00058 # define FOAM_USE_MALLOC_HOOK 00059 #endif 00060 00061 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * // 00062 00063 namespace Foam 00064 { 00065 00066 /*---------------------------------------------------------------------------*\ 00067 Class sigFpeImpl Declaration 00068 \*---------------------------------------------------------------------------*/ 00069 00070 class sigFpeImpl 00071 { 00072 // Private data 00073 00074 //- Saved old signal trapping setting 00075 static struct sigaction oldAction_; 00076 00077 # ifdef FOAM_USE_MALLOC_HOOK 00078 00079 //- Saved old malloc 00080 static void *(*old_malloc_hook)(size_t, const void *); 00081 00082 //- nan malloc function. From malloc_hook manpage. 00083 static void* my_malloc_hook(size_t size, const void *caller); 00084 00085 # endif 00086 00087 00088 // Static data members 00089 00090 # ifdef FOAM_USE_FPE_HANDLING 00091 00092 //- Handler for caught signals 00093 static void sigFpeHandler(int); 00094 00095 # endif 00096 00097 00098 public: 00099 00100 00101 // Constructors 00102 00103 sigFpeImpl(); 00104 00105 00106 // Destructor 00107 00108 ~sigFpeImpl(); 00109 00110 00111 // Member functions 00112 00113 void set(const bool verbose); 00114 }; 00115 00116 00117 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * // 00118 00119 } // End namespace Foam 00120 00121 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * // 00122 00123 #endif 00124 00125 // ************************ vim: set sw=4 sts=4 et: ************************ //
