EXTERN_C_FOR_PETSC_END Namespace Reference

Functions
std::streambuf *	out_buf (NULL)
std::streambuf *	err_buf (NULL)
void	libmesh_handleFPE (int, siginfo_t *info, void *)
void	enableFPE (bool on)
Variables
AutoPtr< GetPot >	command_line (NULL)
AutoPtr< std::ofstream >	_ofstream (NULL)
AutoPtr < libMesh::Threads::task_scheduler_init >	task_scheduler (NULL)
bool	libmesh_initialized_mpi = false
bool	libmesh_initialized_petsc = false
bool	libmesh_initialized_slepc = false

---

Function Documentation

void EXTERN_C_FOR_PETSC_END::enableFPE

(

bool

on

)

Toggle floating point exceptions -- courtesy of Cody Permann & MOOSE team

Definition at line 133 of file libmesh.C.

References libmesh_handleFPE().

  {
#if !defined(LIBMESH_HAVE_FEENABLEEXCEPT) && defined(LIBMESH_HAVE_XMMINTRIN_H)
    static int flags = 0;
#endif
    
    if (on)
      {
        struct sigaction new_action, old_action;
        
#ifdef LIBMESH_HAVE_FEENABLEEXCEPT
        feenableexcept(FE_DIVBYZERO | FE_INVALID);
#elif  LIBMESH_HAVE_XMMINTRIN_H
#  ifndef __SUNPRO_CC   
        flags = _MM_GET_EXCEPTION_MASK();           // store the flags
        _MM_SET_EXCEPTION_MASK(flags & ~_MM_MASK_INVALID);
#  endif
#endif
        

        // Set up the structure to specify the new action.
        new_action.sa_sigaction = libmesh_handleFPE;
        sigemptyset (&new_action.sa_mask);
        new_action.sa_flags = SA_SIGINFO;
        
        sigaction (SIGFPE, NULL, &old_action);
        if (old_action.sa_handler != SIG_IGN)
          sigaction (SIGFPE, &new_action, NULL);
      }
    else
      {
#ifdef LIBMESH_HAVE_FEDISABLEEXCEPT
        fedisableexcept(FE_DIVBYZERO | FE_INVALID);
#elif  LIBMESH_HAVE_XMMINTRIN_H
#  ifndef __SUNPRO_CC   
        _MM_SET_EXCEPTION_MASK(flags);
#  endif        
#endif
        signal(SIGFPE, 0);
      }
  }

std::streambuf* EXTERN_C_FOR_PETSC_END::err_buf

(

NULL

)

void EXTERN_C_FOR_PETSC_END::libmesh_handleFPE	(	int	,
		siginfo_t *	info,
		void *
	)

Floating point exception handler -- courtesy of Cody Permann & MOOSE team

Definition at line 100 of file libmesh.C.

Referenced by enableFPE().

  {
    std::cout << std::endl;
    std::cout << "Floating point exception signaled (";
    switch (info->si_code)
      {
      case FPE_INTDIV: std::cerr << "integer divide by zero"; break;
      case FPE_INTOVF: std::cerr << "integer overflow"; break;
      case FPE_FLTDIV: std::cerr << "floating point divide by zero"; break;
      case FPE_FLTOVF: std::cerr << "floating point overflow"; break;
      case FPE_FLTUND: std::cerr << "floating point underflow"; break;
      case FPE_FLTRES: std::cerr << "floating point inexact result"; break;
      case FPE_FLTINV: std::cerr << "invalid floating point operation"; break;
      case FPE_FLTSUB: std::cerr << "subscript out of range"; break;
      default:         std::cerr << "unrecognized"; break;
      }
    std::cout << ")!" << std::endl;
    
    std::cout << std::endl;
    std::cout << "To track this down, compile debug version, start debugger, set breakpoint for 'libmesh_handleFPE' and run" << std::endl;
    std::cout << "In gdb do:" << std::endl;
    std::cout << "  break libmesh_handleFPE" << std::endl;
    std::cout << "  run ..." << std::endl;
    std::cout << "  bt" << std::endl;
    
    libmesh_error();
  }

std::streambuf* EXTERN_C_FOR_PETSC_END::out_buf

(

NULL

)

---

Variable Documentation

AutoPtr<std::ofstream> EXTERN_C_FOR_PETSC_END::_ofstream(NULL)

AutoPtr<GetPot> EXTERN_C_FOR_PETSC_END::command_line(NULL)

bool EXTERN_C_FOR_PETSC_END::libmesh_initialized_mpi = false

Definition at line 86 of file libmesh.C.

bool EXTERN_C_FOR_PETSC_END::libmesh_initialized_petsc = false

Definition at line 89 of file libmesh.C.

bool EXTERN_C_FOR_PETSC_END::libmesh_initialized_slepc = false

Definition at line 92 of file libmesh.C.

AutoPtr<libMesh::Threads::task_scheduler_init> EXTERN_C_FOR_PETSC_END::task_scheduler(NULL)