PetscSetupAndFinalize.hpp

00001 /*
00002 
00003 Copyright (C) University of Oxford, 2005-2009
00004 
00005 University of Oxford means the Chancellor, Masters and Scholars of the
00006 University of Oxford, having an administrative office at Wellington
00007 Square, Oxford OX1 2JD, UK.
00008 
00009 This file is part of Chaste.
00010 
00011 Chaste is free software: you can redistribute it and/or modify it
00012 under the terms of the GNU Lesser General Public License as published
00013 by the Free Software Foundation, either version 2.1 of the License, or
00014 (at your option) any later version.
00015 
00016 Chaste 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 Lesser General Public
00019 License for more details. The offer of Chaste under the terms of the
00020 License is subject to the License being interpreted in accordance with
00021 English Law and subject to any action against the University of Oxford
00022 being under the jurisdiction of the English Courts.
00023 
00024 You should have received a copy of the GNU Lesser General Public License
00025 along with Chaste. If not, see <http://www.gnu.org/licenses/>.
00026 
00027 */
00028 
00029 
00030 #ifndef _PETSCSETUPANDFINALIZE_HPP_
00031 #define _PETSCSETUPANDFINALIZE_HPP_
00032 
00041 #ifdef TEST_FOR_FPE
00042 #include <fenv.h>
00043 #include <signal.h>
00044 #endif
00045 #include <cxxtest/GlobalFixture.h>
00046 #include <petsc.h>
00047 #include <cstdlib>
00048 #include <unistd.h>
00049 #include <iostream>
00050 #include "Exception.hpp"
00051 #include "PetscException.hpp"
00052 #include "PetscArguments.hpp"
00053 #include "Version.hpp"
00054 
00055 #ifdef TEST_FOR_FPE
00056 void FpeSignalToAbort(int sig_num, siginfo_t* info, void* context )
00057 {
00058        if ( info->si_code == FPE_FLTDIV) 
00059        {
00060            std::cerr<<"SIGFPE: floating point exception was divide by zero.\n";
00061        }
00062        else if ( info->si_code == FPE_FLTINV) 
00063        {
00064            std::cerr<<"SIGFPE: floating point exception was an invalid operation (like 0.0/0.0).\n";
00065        }
00066        else
00067        {
00068            std::cerr<<"SIGFPE: unexpected error code.\n";
00069        }
00070 }
00071 #endif
00072 
00073 class PetscSetup : public CxxTest::GlobalFixture
00074 {
00075 public:
00077     bool setUpWorld()
00078     {
00083         PetscArguments *p_args = PetscArguments::Instance();
00084         PETSCEXCEPT(PetscInitialize(p_args->p_argc, p_args->p_argv,
00085                                     PETSC_NULL, PETSC_NULL) );
00086 
00087         char buf[10000];
00088         std::cout << std::endl << "CWD: " << getcwd(buf, 10000) << std::endl;
00089         std::cout << "Root: " << GetChasteRoot() << std::endl;
00090         EXPECT0(chdir, GetChasteRoot());
00091         std::cout << "CWD: " << getcwd(buf, 10000) << std::endl;
00092        
00093  #ifdef TEST_FOR_FPE
00094         //Give all PETSc enabled tests the ability to trap for divide-by-zero
00095         feenableexcept(FE_DIVBYZERO | FE_INVALID );
00096         //Catch all SIGFPE signals and convert them to exceptions (before PETSc gets to them).
00097         struct sigaction sa;
00098         sa.sa_sigaction = FpeSignalToAbort;
00099         sa.sa_flags = SA_RESETHAND|SA_SIGINFO;
00100         sa.sa_restorer = 0;
00101         sigaction(SIGFPE, &sa, NULL);
00102  #endif       
00103         return true;
00104     }
00106     bool tearDownWorld()
00107     {
00108         //std::cout << "Finalizing..." << std::endl;
00109         PETSCEXCEPT(PetscFinalize());
00110         return true;
00111     }
00112 };
00113 
00114 static PetscSetup thisSetup;
00115 
00116 
00117 #endif //_PETSCSETUPANDFINALIZE_HPP_

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