SubSystemsManager

class dolfin.cpp.common.SubSystemsManager(*args, **kwargs)

Bases: object

This is a singleton class which manages the initialisation and finalisation of various sub systems, such as MPI and PETSc.

static finalize()

Finalize subsystems. This will be called by the destructor, but in special cases it may be necessary to call finalize explicitly.

Return type:void

static init_mpi(*args) → int

Initialise MPI with required level of thread support.

Parameters:

• argc (int) –
• * argv (char) –
• required_thread_level (int) –

Return type:

int

static init_petsc()

Initialize PETSc with command-line arguments. Note that PETSc command-line arguments may also be filtered and sent to PETSc by parameters.parse(argc, argv).

Parameters:

• argc (int) –
• * argv (char) –

Return type:

void

static mpi_finalized() → bool

Check if MPI has been finalized (returns true if MPI has been finalised)

Return type:bool

static mpi_initialized() → bool

Check if MPI has been initialised (returns true if MPI has been initialised, even if it is later finalised)

Return type:bool

petsc_err_msg

Last recorded PETSc error message.

Return type:std::string

static responsible_mpi() → bool

Return true if DOLFIN initialised MPI (and is therefore responsible for finalization)

Return type:bool

static responsible_petsc() → bool

Return true if DOLFIN initialised PETSc (and is therefore responsible for finalization)

Return type:bool

static singleton()

Singleton instance. Calling this ensures singleton instance of SubSystemsManager is initialized according to the “Construct on First Use” idiom.

Return type:SubSystemsManager &

thisown

The membership flag