finishing the changes for the non-blocking and split cpllective I/O operations. Everything except for the

interface changes to the io framework is done.

ompi/mca/io/ompio/io_ompio_file_write.c

@@ -726,6 +726,45 @@ int mca_io_ompio_file_write_ordered_end (ompi_file_t *fp,
 
 /* Split collectives . Not really used but infrastructure is in place */
 /**********************************************************************/
+int mca_io_ompio_file_write_all_begin (ompi_file_t *fh,
+				       void *buf,
+				       int count,
+				       struct ompi_datatype_t *datatype)
+{
+    int ret = OMPI_SUCCESS;
+    mca_io_ompio_file_t *fp;
+    mca_io_ompio_data_t *data;
+
+    data = (mca_io_ompio_data_t *) fh->f_io_selected_data;
+    fp = &data->ompio_fh;
+    if ( true == fp->f_split_coll_in_use ) {
+	printf("Only one split collective I/O operation allowed per file handle at any given point in time!\n");
+	return MPI_ERR_OTHER;
+    }
+    ret = mca_io_ompio_file_iwrite_all ( fh, buf, count, datatype, &fp->f_split_coll_req );
+    fp->f_split_coll_in_use = true;
+
+    return ret;
+}
+
+int mca_io_ompio_file_write_all_end (ompi_file_t *fh,
+				     void *buf,
+				     ompi_status_public_t *status)
+{
+    int ret = OMPI_SUCCESS;
+    mca_io_ompio_file_t *fp;
+    mca_io_ompio_data_t *data;
+
+    data = (mca_io_ompio_data_t *) fh->f_io_selected_data;
+    fp = &data->ompio_fh;
+    ret = ompi_request_wait ( &fp->f_split_coll_req, status );
+
+    /* remove the flag again */
+    fp->f_split_coll_in_use = false;
+    return ret;
+}
+
+
 int mca_io_ompio_file_write_at_all_begin (ompi_file_t *fh,
 					  OMPI_MPI_OFFSET_TYPE offset,
 					  void *buf,
@@ -736,7 +775,7 @@ int mca_io_ompio_file_write_at_all_begin (ompi_file_t *fh,
     mca_io_ompio_data_t *data;
 
     data = (mca_io_ompio_data_t *) fh->f_io_selected_data;
-    ret = ompio_io_ompio_file_write_at_all_begin (&data->ompio_fh, offset, buf, count, datatype );
+    ret = ompio_io_ompio_file_write_at_all_begin ( &data->ompio_fh,  offset, buf, count, datatype );
     return ret;
 }
 
@@ -747,17 +786,13 @@ int ompio_io_ompio_file_write_at_all_begin (mca_io_ompio_file_t *fh,
 					    struct ompi_datatype_t *datatype)
 {
     int ret = OMPI_SUCCESS;
-    OMPI_MPI_OFFSET_TYPE prev_offset;
-    ompio_io_ompio_file_get_position (fh, &prev_offset );
 
-    ompi_io_ompio_set_explicit_offset (fh, offset);
-
-    /* It is OK to reset the position already here, althgouth 
-    ** the operation might still be pending/ongoing, since
-    ** the entire array of <offset, length, memaddress> have 
-    ** already been constructed in the file_write_all_begin operation
-    */
-    ompi_io_ompio_set_explicit_offset (fh, prev_offset);
+    if ( true == fh->f_split_coll_in_use ) {
+	printf("Only one split collective I/O operation allowed per file handle at any given point in time!\n");
+	return MPI_ERR_REQUEST;
+    }
+    ret = mca_io_ompio_file_iwrite_at_all ( fh->f_fh, offset, buf, count, datatype, &fh->f_split_coll_req );
+    fh->f_split_coll_in_use = true;
     return ret;
 }
 
@@ -769,8 +804,7 @@ int mca_io_ompio_file_write_at_all_end (ompi_file_t *fh,
     mca_io_ompio_data_t *data;
 
     data = (mca_io_ompio_data_t *) fh->f_io_selected_data;
-    ret = ompio_io_ompio_file_write_at_all_end(&data->ompio_fh,buf,status);
-
+    ret = ompio_io_ompio_file_read_at_all_end ( &data->ompio_fh, buf, status );
     return ret;
 }
 
@@ -779,33 +813,10 @@ int ompio_io_ompio_file_write_at_all_end (mca_io_ompio_file_t *fh,
 					  ompi_status_public_t * status)
 {
     int ret = OMPI_SUCCESS;
-    
+    ret = ompi_request_wait ( &fh->f_split_coll_req, status );
 
-    return ret;
-}
-
-int mca_io_ompio_file_write_all_begin (ompi_file_t *fh,
-				       void *buf,
-				       int count,
-				       struct ompi_datatype_t *datatype)
-{
-    int ret = OMPI_SUCCESS;
-    mca_io_ompio_data_t *data;
-
-    data = (mca_io_ompio_data_t *) fh->f_io_selected_data;
-
-    return ret;
-}
-
-int mca_io_ompio_file_write_all_end (ompi_file_t *fh,
-				     void *buf,
-				     ompi_status_public_t *status)
-{
-    int ret = OMPI_SUCCESS;
-    mca_io_ompio_data_t *data;
-
-    data = (mca_io_ompio_data_t *) fh->f_io_selected_data;
-    
+    /* remove the flag again */
+    fh->f_split_coll_in_use = false;
     return ret;
 }