PetscSetupAndFinalize.hpp

/*

Copyright (c) 2005-2012, University of Oxford.
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*/

#ifndef _PETSCSETUPANDFINALIZE_HPP_
#define _PETSCSETUPANDFINALIZE_HPP_

#ifdef TEST_FOR_FPE
#include <fenv.h>
#include <signal.h>
#endif

#include <cxxtest/GlobalFixture.h>
#include <petsc.h>
#include <cstdlib>
#include <cassert>
#include <cstring>
#include <unistd.h>
#include <iostream>

#include "Exception.hpp"
#include "PetscException.hpp"
#include "CommandLineArguments.hpp"
#include "ChasteBuildRoot.hpp"
#include "GetCurrentWorkingDirectory.hpp"

#ifdef TEST_FOR_FPE
void FpeSignalToAbort(int sig_num, siginfo_t* info, void* context )
{
       if ( info->si_code == FPE_FLTDIV)
       {
           std::cerr<<"SIGFPE: floating point exception was divide by zero.\n";
       }
       else if ( info->si_code == FPE_FLTINV)
       {
           std::cerr<<"SIGFPE: floating point exception was an invalid operation (like 0.0/0.0).\n";
       }
       else
       {
           std::cerr<<"SIGFPE: unexpected error code.\n";
       }
}
#endif

class PetscSetup : public CxxTest::GlobalFixture
{
public:

    bool setUpWorld()
    {
        // The CommandLineArguments instance is filled in by the cxxtest test suite runner.
        CommandLineArguments* p_args = CommandLineArguments::Instance();
        PETSCEXCEPT(PetscInitialize(p_args->p_argc, p_args->p_argv,
                                    PETSC_NULL, PETSC_NULL) );

        // Check that the working directory is correct, or many tests will fail
        std::string cwd = GetCurrentWorkingDirectory() + "/";
        if (strcmp(cwd.c_str(), ChasteBuildRootDir()) != 0)
        {
#define COVERAGE_IGNORE
            // Change directory
            std::cout << std::endl << "Changing directory from '" << cwd << "' to '" << ChasteBuildRootDir() << "'." << std::endl;
            EXPECT0(chdir, ChasteBuildRootDir());
            std::cout << "CWD now: " << GetCurrentWorkingDirectory() << std::endl;
#undef COVERAGE_IGNORE
        }

#ifdef TEST_FOR_FPE
        // Give all PETSc enabled tests the ability to trap for divide-by-zero
        feenableexcept(FE_DIVBYZERO | FE_INVALID );
        // Catch all SIGFPE signals and convert them to exceptions (before PETSc gets to them)
        struct sigaction sa;
        sa.sa_sigaction = FpeSignalToAbort;
        sa.sa_flags = SA_RESETHAND|SA_SIGINFO;
        sa.sa_restorer = 0;
        sigaction(SIGFPE, &sa, NULL);
#endif
        return true;
    }
    bool tearDownWorld()
    {
        PETSCEXCEPT(PetscFinalize());
        return true;
    }
};

static PetscSetup thisSetup;

#endif //_PETSCSETUPANDFINALIZE_HPP_