int mca_sharedfp_sm_iwrite(mca_io_ompio_file_t *fh,
const void *buf,
int count,
ompi_datatype_t *datatype,
MPI_Request * request)
{
int ret = OMPI_SUCCESS;
OMPI_MPI_OFFSET_TYPE offset = 0;
long bytesRequested = 0;
size_t numofBytes;
struct mca_sharedfp_base_data_t *sh = NULL;
mca_sharedfp_base_module_t * shared_fp_base_module = NULL;
if( NULL == fh->f_sharedfp_data){
if ( mca_sharedfp_sm_verbose ) {
opal_output(ompi_sharedfp_base_framework.framework_output,
"sharedfp_sm_iwrite - opening the shared file pointer\n");
}
shared_fp_base_module = fh->f_sharedfp;
ret = shared_fp_base_module->sharedfp_file_open(fh->f_comm,
fh->f_filename,
fh->f_amode,
fh->f_info,
fh);
if ( OMPI_SUCCESS != ret ) {
opal_output(0,"sharedfp_sm_iwrite - error opening the shared file pointer\n");
return ret;
}
}
/* Calculate the number of bytes to write */
opal_datatype_type_size ( &datatype->super, &numofBytes);
bytesRequested = count * numofBytes;
/* Retrieve the shared file data struct */
sh = fh->f_sharedfp_data;
if ( mca_sharedfp_sm_verbose ) {
opal_output(ompi_sharedfp_base_framework.framework_output,
"sharedfp_sm_iwrite: Bytes Requested is %ld\n",bytesRequested);
}
/* Request the offset to write bytesRequested bytes */
ret = mca_sharedfp_sm_request_position(sh,bytesRequested,&offset);
offset /= sh->sharedfh->f_etype_size;
if ( -1 != ret ) {
if ( mca_sharedfp_sm_verbose ) {
opal_output(ompi_sharedfp_base_framework.framework_output,
"sharedfp_sm_iwrite: Offset received is %lld\n",offset);
}
/* Write to the file */
ret = ompio_io_ompio_file_iwrite_at(sh->sharedfh,offset,buf,count,datatype,request);
}
return ret;
}
int mca_io_ompio_file_iwrite_at (ompi_file_t *fh,
OMPI_MPI_OFFSET_TYPE offset,
void *buf,
int count,
struct ompi_datatype_t *datatype,
ompi_request_t **request)
{
int ret = OMPI_SUCCESS;
mca_io_ompio_data_t *data;
data = (mca_io_ompio_data_t *) fh->f_io_selected_data;
ret = ompio_io_ompio_file_iwrite_at(&data->ompio_fh,offset,buf,count,datatype,request);
return ret;
}
