Python/BasicUtils/SessionReader.cpp File Reference

#include <LibUtilities/BasicUtils/SessionReader.h>
#include <LibUtilities/Python/NekPyConfig.hpp>

Go to the source code of this file.

Functions
SessionReaderSharedPtr	SessionReader_CreateInstance (py::list &ns)
	Thin wrapper around SessionReader to provide a nicer Pythonic interface. More...
void	export_SessionReader ()
	SessionReader exports. More...

Function Documentation

export_SessionReader()

void export_SessionReader

(

)

SessionReader exports.

Currently wrapped functions:

• SessionReader::CreateInstance for creating objects
• SessionReader::GetSessionName to return the session name
• SessionReader::Finalise to deal with finalising things

Definition at line 122 of file Python/BasicUtils/SessionReader.cpp.

{
    py::class_<SessionReader, std::shared_ptr<SessionReader>,
               boost::noncopyable>("SessionReader", py::no_init)
 
        .def("CreateInstance", SessionReader_CreateInstance)
        .staticmethod("CreateInstance")
 
        .def("GetSessionName", &SessionReader::GetSessionName,
             py::return_value_policy<py::copy_const_reference>())
 
        .def("Finalise", &SessionReader::Finalise)
 
        .def("DefinesParameter", &SessionReader::DefinesParameter)
        .def("GetParameter", &SessionReader::GetParameter,
             py::return_value_policy<py::return_by_value>())
 
        .def("GetVariable", &SessionReader::GetVariable,
             py::return_value_policy<py::copy_const_reference>())
 
        .def("GetComm", &SessionReader::GetComm)
 
        ;
}

References Nektar::LibUtilities::SessionReader::DefinesParameter(), Nektar::LibUtilities::SessionReader::Finalise(), Nektar::LibUtilities::SessionReader::GetComm(), Nektar::LibUtilities::SessionReader::GetParameter(), Nektar::LibUtilities::SessionReader::GetSessionName(), Nektar::LibUtilities::SessionReader::GetVariable(), and SessionReader_CreateInstance().

Referenced by BOOST_PYTHON_MODULE().

SessionReader_CreateInstance()

SessionReaderSharedPtr SessionReader_CreateInstance

(

py::list &

ns

)

Thin wrapper around SessionReader to provide a nicer Pythonic interface.

This allows us to do, for example

session = SessionReader.CreateInstance(sys.argv)

which is more natural in Python.

Definition at line 55 of file Python/BasicUtils/SessionReader.cpp.

{
    int i, argc = py::len(ns), bufSize = 0;
    char **argv = new char *[argc + 1], *p;
 
    // Create argc, argv to give to the session reader. Note that this needs to
    // be a contiguous block in memory, otherwise MPI (specifically OpenMPI)
    // will likely segfault.
    for (i = 0; i < argc; ++i)
    {
        std::string tmp = py::extract<std::string>(ns[i]);
        bufSize += tmp.size() + 1;
    }
 
    std::vector<char> buf(bufSize);
    for (i = 0, p = &buf[0]; i < argc; ++i)
    {
        std::string tmp = py::extract<std::string>(ns[i]);
        std::copy(tmp.begin(), tmp.end(), p);
        p[tmp.size()] = '\0';
        argv[i]       = p;
        p += tmp.size() + 1;
    }
 
    // Also make sure we set argv[argc] = NULL otherwise OpenMPI will also
    // segfault.
    argv[argc] = NULL;
 
#ifdef NEKTAR_USE_MPI
    // In the case we're using MPI, it may already have been initialised. So to
    // handle this, we'll construct our own CommMpi object and pass through to
    // the SessionReader. This will persist indefinitely, or at least until the
    // library is unloaded by Python.
 
    if (!MPICOMM)
    {
        MPICOMM = GetCommFactory().CreateInstance("ParallelMPI", argc, argv);
    }
 
    std::vector<std::string> filenames(argc - 1);
    for (i = 1; i < argc; ++i)
    {
        filenames[i - 1] = std::string(argv[i]);
    }
 
    // Create session reader.
    SessionReaderSharedPtr sr =
        SessionReader::CreateInstance(argc, argv, filenames, MPICOMM);
#else
    // Create session reader.
    SessionReaderSharedPtr sr = SessionReader::CreateInstance(argc, argv);
#endif
 
    // Clean up.
    delete[] argv;
 
    return sr;
}

References CellMLToNektar.pycml::copy(), Nektar::LibUtilities::SessionReader::CreateInstance(), Nektar::LibUtilities::NekFactory< tKey, tBase, tParam >::CreateInstance(), Nektar::LibUtilities::GetCommFactory(), and CellMLToNektar.cellml_metadata::p.

Referenced by export_SessionReader().