PetscSetupAndFinalize.hpp

00001 /*
00002 
00003 Copyright (C) University of Oxford, 2005-2010
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 
00038 #ifdef TEST_FOR_FPE
00039 #include <fenv.h>
00040 #include <signal.h>
00041 #endif
00042 
00043 #include <cxxtest/GlobalFixture.h>
00044 #include <petsc.h>
00045 #include <cstdlib>
00046 #include <cassert>
00047 #include <cstring>
00048 #include <unistd.h>
00049 #include <iostream>
00050 
00051 #include "Exception.hpp"
00052 #include "PetscException.hpp"
00053 #include "CommandLineArguments.hpp"
00054 #include "ChasteBuildRoot.hpp"
00055 #include "GetCurrentWorkingDirectory.hpp"
00056 
00057 #ifdef TEST_FOR_FPE
00058 void FpeSignalToAbort(int sig_num, siginfo_t* info, void* context )
00059 {
00060        if ( info->si_code == FPE_FLTDIV)
00061        {
00062            std::cerr<<"SIGFPE: floating point exception was divide by zero.\n";
00063        }
00064        else if ( info->si_code == FPE_FLTINV)
00065        {
00066            std::cerr<<"SIGFPE: floating point exception was an invalid operation (like 0.0/0.0).\n";
00067        }
00068        else
00069        {
00070            std::cerr<<"SIGFPE: unexpected error code.\n";
00071        }
00072 }
00073 #endif
00074 
00075 class PetscSetup : public CxxTest::GlobalFixture
00076 {
00077 public:
00079     bool setUpWorld()
00080     {
00085         CommandLineArguments* p_args = CommandLineArguments::Instance();
00086         PETSCEXCEPT(PetscInitialize(p_args->p_argc, p_args->p_argv,
00087                                     PETSC_NULL, PETSC_NULL) );
00088 
00089         // Check that the working directory is correct, or many tests will fail.
00090         std::string cwd = GetCurrentWorkingDirectory() + "/";
00091         if (strcmp(cwd.c_str(), ChasteBuildRootDir()) != 0)
00092         {
00093 #define COVERAGE_IGNORE
00094             // Change directory
00095             std::cout << std::endl << "Changing directory from '" << cwd << "' to '" << ChasteBuildRootDir() << "'." << std::endl;
00096             EXPECT0(chdir, ChasteBuildRootDir());
00097             std::cout << "CWD now: " << GetCurrentWorkingDirectory() << std::endl;
00098 #undef COVERAGE_IGNORE
00099         }
00100 
00101 #ifdef TEST_FOR_FPE
00102         //Give all PETSc enabled tests the ability to trap for divide-by-zero
00103         feenableexcept(FE_DIVBYZERO | FE_INVALID );
00104         //Catch all SIGFPE signals and convert them to exceptions (before PETSc gets to them).
00105         struct sigaction sa;
00106         sa.sa_sigaction = FpeSignalToAbort;
00107         sa.sa_flags = SA_RESETHAND|SA_SIGINFO;
00108         sa.sa_restorer = 0;
00109         sigaction(SIGFPE, &sa, NULL);
00110 #endif
00111         return true;
00112     }
00114     bool tearDownWorld()
00115     {
00116         //std::cout << "Finalizing..." << std::endl;
00117         PETSCEXCEPT(PetscFinalize());
00118         return true;
00119     }
00120 };
00121 
00122 static PetscSetup thisSetup;
00123 
00124 
00125 #endif //_PETSCSETUPANDFINALIZE_HPP_

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