int MPI_File_open(MPI_Comm comm, char *filename, int amode,
MPI_Info info, MPI_File *fh)
{
int rc;
if (MPI_PARAM_CHECK) {
OMPI_ERR_INIT_FINALIZE(FUNC_NAME);
if (NULL == info || ompi_info_is_freed(info)) {
return OMPI_ERRHANDLER_INVOKE(MPI_COMM_WORLD, MPI_ERR_INFO,
FUNC_NAME);
} else if (ompi_comm_invalid(comm)) {
return OMPI_ERRHANDLER_INVOKE(MPI_COMM_WORLD, MPI_ERR_COMM,
FUNC_NAME);
}
if (OMPI_COMM_IS_INTER(comm)) {
return OMPI_ERRHANDLER_INVOKE (comm, MPI_ERR_COMM,
FUNC_NAME);
}
}
/* Note that MPI-2:9.7 (p265 in the ps; p261 in the pdf) says that
errors in MPI_FILE_OPEN (before the file handle is created)
should invoke the default error handler on MPI_FILE_NULL.
Hence, if we get a file handle out of ompi_file_open(), invoke
the error handler on that. If not, invoke the error handler on
MPI_FILE_NULL. */
/* The io framework is only initialized lazily. If it hasn't
already been initialized, do so now (note that MPI_FILE_OPEN
and MPI_FILE_DELETE are the only two places that it will be
initialized). */
if (!(mca_io_base_components_opened_valid ||
mca_io_base_components_available_valid)) {
if (OMPI_SUCCESS != (rc = mca_io_base_open())) {
return OMPI_ERRHANDLER_INVOKE(MPI_FILE_NULL, rc, FUNC_NAME);
}
if (OMPI_SUCCESS !=
(rc = mca_io_base_find_available(OMPI_ENABLE_PROGRESS_THREADS,
OMPI_ENABLE_MPI_THREADS))) {
return OMPI_ERRHANDLER_INVOKE(MPI_FILE_NULL, rc, FUNC_NAME);
}
}
/* Create an empty MPI_File handle */
*fh = MPI_FILE_NULL;
rc = ompi_file_open(comm, filename, amode, info, fh);
/* Creating the file handle also selects a component to use,
creates a module, and calls file_open() on the module. So
we're good to go. */
OMPI_ERRHANDLER_RETURN(rc, *fh, rc, FUNC_NAME);
}
int MPI_File_delete(char *filename, MPI_Info info)
{
int rc;
if (MPI_PARAM_CHECK) {
rc = MPI_SUCCESS;
OMPI_ERR_INIT_FINALIZE(FUNC_NAME);
if (NULL == info || ompi_info_is_freed(info)) {
rc = MPI_ERR_INFO;
} else if (NULL == filename) {
rc = MPI_ERR_ARG;
}
OMPI_ERRHANDLER_CHECK(rc, MPI_FILE_NULL, rc, FUNC_NAME);
}
/* Note that MPI-2:9.7 (p265 in the ps; 261 in the pdf) says that
errors in MPI_FILE_OPEN (before the file handle is created)
should invoke the default error handler on MPI_FILE_NULL.
Hence, if we get a file handle out of ompi_file_open(), invoke
the error handler on that. If not, invoke the error handler on
MPI_FILE_NULL. */
/* The io framework is only initialized lazily. If it hasn't
already been initialized, do so now (note that MPI_FILE_OPEN
and MPI_FILE_DELETE are the only two places that it will be
initialized). */
if (!(mca_io_base_components_opened_valid ||
mca_io_base_components_available_valid)) {
if (OMPI_SUCCESS != (rc = mca_io_base_open())) {
return OMPI_ERRHANDLER_INVOKE(MPI_FILE_NULL, rc, FUNC_NAME);
}
if (OMPI_SUCCESS !=
(rc = mca_io_base_find_available(OPAL_ENABLE_PROGRESS_THREADS,
OMPI_ENABLE_THREAD_MULTIPLE))) {
return OMPI_ERRHANDLER_INVOKE(MPI_FILE_NULL, rc, FUNC_NAME);
}
}
OPAL_CR_ENTER_LIBRARY();
/* Since there is no MPI_File handle associated with this
function, the MCA has to do a selection and perform the
action */
rc = mca_io_base_delete(filename, info);
OMPI_ERRHANDLER_RETURN(rc, MPI_FILE_NULL, rc, FUNC_NAME);
}
int MPI_Register_datarep(char *datarep,
MPI_Datarep_conversion_function *read_conversion_fn,
MPI_Datarep_conversion_function *write_conversion_fn,
MPI_Datarep_extent_function *dtype_file_extent_fn,
void *extra_state)
{
int rc;
if (MPI_PARAM_CHECK) {
rc = MPI_SUCCESS;
OMPI_ERR_INIT_FINALIZE(FUNC_NAME);
if (NULL == datarep) {
rc = MPI_ERR_ARG;
}
OMPI_ERRHANDLER_CHECK(rc, MPI_FILE_NULL, rc, FUNC_NAME);
}
/* The io framework is only initialized lazily. If it hasn't
already been initialized, do so now (note that MPI_FILE_OPEN
and MPI_FILE_DELETE are the only two places that it will be
initialized). */
if (!(mca_io_base_components_opened_valid ||
mca_io_base_components_available_valid)) {
if (OMPI_SUCCESS != (rc = mca_io_base_open())) {
return OMPI_ERRHANDLER_INVOKE(MPI_FILE_NULL, rc, FUNC_NAME);
}
if (OMPI_SUCCESS !=
(rc = mca_io_base_find_available(OMPI_ENABLE_PROGRESS_THREADS,
OMPI_ENABLE_MPI_THREADS))) {
return OMPI_ERRHANDLER_INVOKE(MPI_FILE_NULL, rc, FUNC_NAME);
}
}
OPAL_CR_ENTER_LIBRARY();
/* Call the back-end io component function */
rc = mca_io_base_register_datarep(datarep, read_conversion_fn,
write_conversion_fn,
dtype_file_extent_fn,
extra_state);
/* All done */
OMPI_ERRHANDLER_RETURN(rc, MPI_FILE_NULL, rc, FUNC_NAME);
}