[svn-r25579] Add version number for VOL plugins in VOL Plugin structure.

1 files changed, 17 insertions, 16 deletions

diff --git a/src/H5VLpublic.h b/src/H5VLpublic.h
index c3face6..35c4c46 100644
--- a/src/H5VLpublic.h
+++ b/src/H5VLpublic.h
@@ -325,26 +325,27 @@ typedef enum H5VL_class_value_t {
 
 /* Class information for each VOL driver */
 typedef struct H5VL_class_t {
-    H5VL_class_value_t value;
-    const char *name;
-    herr_t  (*initialize)(hid_t vipl_id);
-    herr_t  (*terminate)(hid_t vtpl_id);
-    size_t  fapl_size;
-    void *  (*fapl_copy)(const void *info);
-    herr_t  (*fapl_free)(void *info);
+    unsigned version;                             /* Class version # */
+    H5VL_class_value_t value;                     /* value to identify plugin */
+    const char *name;                             /* Plugin name */
+    herr_t  (*initialize)(hid_t vipl_id);         /* Plugin initialization callback */
+    herr_t  (*terminate)(hid_t vtpl_id);          /* Plugin termination callback */
+    size_t  fapl_size;                            /* size of the vol info in the fapl property */
+    void *  (*fapl_copy)(const void *info);       /* callback to create a copy of the vol info */
+    herr_t  (*fapl_free)(void *info);             /* callback to release the vol info copy */
 
     /* Data Model */
-    H5VL_attr_class_t          attr_cls;
-    H5VL_dataset_class_t       dataset_cls;
-    H5VL_datatype_class_t      datatype_cls;
-    H5VL_file_class_t          file_cls;
-    H5VL_group_class_t         group_cls;
-    H5VL_link_class_t          link_cls;
-    H5VL_object_class_t        object_cls;
+    H5VL_attr_class_t          attr_cls;          /* attribute class callbacks */
+    H5VL_dataset_class_t       dataset_cls;       /* dataset class callbacks */
+    H5VL_datatype_class_t      datatype_cls;      /* datatype class callbacks */
+    H5VL_file_class_t          file_cls;          /* file class callbacks */
+    H5VL_group_class_t         group_cls;         /* group class callbacks */
+    H5VL_link_class_t          link_cls;          /* link class callbacks */
+    H5VL_object_class_t        object_cls;        /* object class callbacks */
 
     /* Services */
-    H5VL_async_class_t         async_cls;
-    herr_t (*optional)(void *obj, hid_t dxpl_id, void **req, va_list arguments);
+    H5VL_async_class_t         async_cls;         /* asynchronous class callbacks */
+    herr_t (*optional)(void *obj, hid_t dxpl_id, void **req, va_list arguments); /* Optional callback */
 } H5VL_class_t;
 
 #ifdef __cplusplus