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-rw-r--r--src/H5A.c19
-rw-r--r--src/H5Oattr.c146
-rw-r--r--src/H5Omessage.c160
-rw-r--r--src/H5Opkg.h3
-rw-r--r--src/H5Oprivate.h1
5 files changed, 209 insertions, 120 deletions
diff --git a/src/H5A.c b/src/H5A.c
index 52bce59..d4ca21b 100644
--- a/src/H5A.c
+++ b/src/H5A.c
@@ -237,6 +237,8 @@ H5Acreate(hid_t loc_id, const char *name, hid_t type_id, hid_t space_id,
HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "location is not valid for an attribute")
if(H5G_loc(loc_id, &loc) < 0)
HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a location")
+ if(0 == (H5F_INTENT(loc.oloc->file) & H5F_ACC_RDWR))
+ HGOTO_ERROR(H5E_ARGS, H5E_WRITEERROR, FAIL, "no write intent on file")
if(!name || !*name)
HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "no name")
if(NULL == (type = (H5T_t *)H5I_object_verify(type_id, H5I_DATATYPE)))
@@ -322,8 +324,7 @@ H5A_create(const H5G_loc_t *loc, const char *name, const H5T_t *type,
/* If the creation property list is H5P_DEFAULT, use the default character encoding */
if(acpl_id == H5P_DEFAULT)
attr->encoding = H5F_DEFAULT_CSET;
- else
- {
+ else {
/* Get a local copy of the attribute creation property list */
if (NULL == (ac_plist = H5I_object(acpl_id)))
HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a property list")
@@ -415,9 +416,9 @@ H5A_create(const H5G_loc_t *loc, const char *name, const H5T_t *type,
HGOTO_ERROR(H5E_ATTR, H5E_CANTOPENOBJ, FAIL, "unable to open")
attr->obj_opened = TRUE;
- /* Create the attribute message and save the attribute index */
- if(H5O_msg_create(&(attr->oloc), H5O_ATTR_ID, 0, H5O_UPDATE_TIME, attr, dxpl_id) < 0)
- HGOTO_ERROR(H5E_ATTR, H5E_CANTINIT, FAIL, "unable to update attribute header messages")
+ /* Create the attribute message */
+ if(H5O_attr_create(&(attr->oloc), dxpl_id, attr) < 0)
+ HGOTO_ERROR(H5E_ATTR, H5E_CANTINSERT, FAIL, "unable to create attribute in object header")
/* Register the new attribute and get an ID for it */
if((ret_value = H5I_register(H5I_ATTR, attr)) < 0)
@@ -427,10 +428,10 @@ H5A_create(const H5G_loc_t *loc, const char *name, const H5T_t *type,
attr->initialized = FALSE;
done:
- if(ret_value < 0) {
+ /* Cleanup on failure */
+ if(ret_value < 0)
if(attr)
(void)H5A_close(attr);
- } /* end if */
FUNC_LEAVE_NOAPI(ret_value)
} /* H5A_create() */
@@ -680,10 +681,10 @@ H5A_open(H5G_loc_t *loc, unsigned idx, hid_t dxpl_id)
HGOTO_ERROR(H5E_ATOM, H5E_CANTREGISTER, FAIL, "unable to register attribute for ID")
done:
- if(ret_value < 0) {
+ /* Cleanup on failure */
+ if(ret_value < 0)
if(attr)
(void)H5A_close(attr);
- } /* end if */
FUNC_LEAVE_NOAPI(ret_value)
} /* H5A_open() */
diff --git a/src/H5Oattr.c b/src/H5Oattr.c
index 617614e..9e22011 100644
--- a/src/H5Oattr.c
+++ b/src/H5Oattr.c
@@ -29,6 +29,12 @@
#include "H5Spkg.h" /* Dataspaces */
#include "H5SMprivate.h" /* Shared Object Header Messages */
+/* User data for iteration when converting attributes to dense storage */
+typedef struct {
+ H5F_t *f; /* Pointer to file for insertion */
+ hid_t dxpl_id; /* DXPL during iteration */
+} H5O_iter_cvt_t;
+
/* User data for iteration when updating an attribute */
typedef struct {
/* down */
@@ -1267,6 +1273,146 @@ done:
/*-------------------------------------------------------------------------
+ * Function: H5O_msg_attr_to_dense_cb
+ *
+ * Purpose: Object header iterator callback routine to convert compact
+ * attributes to dense attributes
+ *
+ * Return: Non-negative on success/Negative on failure
+ *
+ * Programmer: Quincey Koziol
+ * koziol@hdfgroup.org
+ * Dec 4 2006
+ *
+ *-------------------------------------------------------------------------
+ */
+static herr_t
+H5A_attr_to_dense_cb(H5O_t *oh, H5O_mesg_t *mesg/*in,out*/,
+ unsigned UNUSED sequence, unsigned *oh_flags_ptr, void *_udata/*in,out*/)
+{
+ H5O_iter_cvt_t *udata = (H5O_iter_cvt_t *)_udata; /* Operator user data */
+ herr_t ret_value = H5_ITER_CONT; /* Return value */
+
+ FUNC_ENTER_NOAPI_NOINIT(H5A_attr_to_dense_cb)
+
+ /* check args */
+ HDassert(oh);
+ HDassert(mesg);
+
+ /* Insert attribute into dense storage */
+ if(H5A_dense_insert(udata->f, udata->dxpl_id, oh, mesg->flags, mesg->native) < 0)
+ HGOTO_ERROR(H5E_OHDR, H5E_CANTINSERT, H5_ITER_ERROR, "unable to add to dense storage")
+
+ /* Convert message into a null message */
+ if(H5O_release_mesg(udata->f, udata->dxpl_id, oh, mesg, TRUE, FALSE) < 0)
+ HGOTO_ERROR(H5E_OHDR, H5E_CANTDELETE, H5_ITER_ERROR, "unable to convert into null message")
+
+ /* Indicate that the object header was modified */
+ *oh_flags_ptr |= H5AC__DIRTIED_FLAG;
+
+done:
+ FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5A_attr_to_dense_cb() */
+
+
+/*-------------------------------------------------------------------------
+ * Function: H5O_attr_create
+ *
+ * Purpose: Create a new attribute in the object header.
+ *
+ * Return: Non-negative on success/Negative on failure
+ *
+ * Programmer: Quincey Koziol
+ * Friday, December 8, 2006
+ *
+ *-------------------------------------------------------------------------
+ */
+herr_t
+H5O_attr_create(const H5O_loc_t *loc, hid_t dxpl_id, H5A_t *attr)
+{
+ H5O_t *oh = NULL; /* Pointer to actual object header */
+ unsigned oh_flags = H5AC__NO_FLAGS_SET; /* Metadata cache flags for object header */
+ unsigned mesg_flags = 0; /* Flags for storing message */
+ htri_t shared_mesg; /* Should this message be stored in the Shared Message table? */
+ herr_t ret_value = SUCCEED; /* Return value */
+
+ FUNC_ENTER_NOAPI_NOINIT(H5O_attr_create)
+
+ /* Check arguments */
+ HDassert(loc);
+ HDassert(attr);
+
+ /* Should this message be written as a SOHM? */
+ if((shared_mesg = H5SM_try_share(loc->file, dxpl_id, H5O_ATTR_ID, attr)) > 0)
+ /* Mark the message as shared */
+ mesg_flags |= H5O_MSG_FLAG_SHARED;
+ else if(shared_mesg < 0)
+ HGOTO_ERROR(H5E_ATTR, H5E_WRITEERROR, FAIL, "error determining if message should be shared")
+
+ /* Protect the object header to iterate over */
+ if(NULL == (oh = H5AC_protect(loc->file, dxpl_id, H5AC_OHDR, loc->addr, NULL, NULL, H5AC_WRITE)))
+ HGOTO_ERROR(H5E_ATTR, H5E_CANTLOAD, FAIL, "unable to load object header")
+
+#ifdef QAK
+HDfprintf(stderr, "%s: adding attribute to new-style object header\n", FUNC);
+HDfprintf(stderr, "%s: oh->nattrs = %Hu\n", FUNC, oh->nattrs);
+HDfprintf(stderr, "%s: oh->max_compact = %u\n", FUNC, oh->max_compact);
+HDfprintf(stderr, "%s: oh->min_dense = %u\n", FUNC, oh->min_dense);
+#endif /* QAK */
+ /* Check for switching to "dense" attribute storage */
+ if(oh->version > H5O_VERSION_1 && oh->nattrs == oh->max_compact &&
+ !H5F_addr_defined(oh->attr_fheap_addr)) {
+ H5O_iter_cvt_t udata; /* User data for callback */
+ H5O_mesg_operator_t op; /* Wrapper for operator */
+#ifdef QAK
+HDfprintf(stderr, "%s: converting attributes to dense storage\n", FUNC);
+#endif /* QAK */
+
+ /* Create dense storage for attributes */
+ if(H5A_dense_create(loc->file, dxpl_id, oh) < 0)
+ HGOTO_ERROR(H5E_OHDR, H5E_CANTINIT, FAIL, "unable to create dense storage for attributes")
+
+ /* Set up user data for callback */
+ udata.f = loc->file;
+ udata.dxpl_id = dxpl_id;
+
+ /* Iterate over existing attributes, moving them to dense storage */
+ op.lib_op = H5A_attr_to_dense_cb;
+ if(H5O_msg_iterate_real(loc->file, oh, H5O_MSG_ATTR, TRUE, op, &udata, dxpl_id, &oh_flags) < 0)
+ HGOTO_ERROR(H5E_ATTR, H5E_CANTCONVERT, FAIL, "error converting attributes to dense storage")
+ } /* end if */
+
+ /* Increment attribute count */
+ oh->nattrs++;
+
+ /* Check for storing attribute with dense storage */
+ if(H5F_addr_defined(oh->attr_fheap_addr)) {
+ /* Insert attribute into dense storage */
+#ifdef QAK
+HDfprintf(stderr, "%s: inserting attribute to dense storage\n", FUNC);
+#endif /* QAK */
+ if(H5A_dense_insert(loc->file, dxpl_id, oh, mesg_flags, attr) < 0)
+ HGOTO_ERROR(H5E_ATTR, H5E_CANTINSERT, FAIL, "unable to add to dense storage")
+ } /* end if */
+ else {
+ /* Append new message to object header */
+ if(H5O_msg_append_real(loc->file, dxpl_id, oh, H5O_MSG_ATTR, mesg_flags, 0, attr, &oh_flags) < 0)
+ HGOTO_ERROR(H5E_ATTR, H5E_CANTINSERT, FAIL, "unable to create new attribute in header")
+ } /* end else */
+
+ /* Update the modification time, if any */
+ if(H5O_touch_oh(loc->file, dxpl_id, oh, FALSE, &oh_flags) < 0)
+ HGOTO_ERROR(H5E_ATTR, H5E_CANTUPDATE, FAIL, "unable to update time on object")
+
+done:
+ if(oh && H5AC_unprotect(loc->file, dxpl_id, H5AC_OHDR, loc->addr, oh, oh_flags) < 0)
+ HDONE_ERROR(H5E_ATTR, H5E_PROTECT, FAIL, "unable to release object header")
+
+ FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5O_attr_create */
+
+
+/*-------------------------------------------------------------------------
* Function: H5O_attr_write_cb
*
* Purpose: Object header iterator callback routine to update an
diff --git a/src/H5Omessage.c b/src/H5Omessage.c
index b7bc47d..1dbe8ff 100644
--- a/src/H5Omessage.c
+++ b/src/H5Omessage.c
@@ -79,12 +79,6 @@ typedef struct {
hbool_t adj_link; /* Whether to adjust links when removing messages */
} H5O_iter_rm_t;
-/* User data for iteration when converting attributes to dense storage */
-typedef struct {
- H5F_t *f; /* Pointer to file for insertion */
- hid_t dxpl_id; /* DXPL during iteration */
-} H5O_iter_to_dense_t;
-
/********************/
/* Package Typedefs */
@@ -135,8 +129,7 @@ static herr_t H5O_write_mesg(H5F_t *f, hid_t dxpl_id, H5O_t *oh, unsigned idx,
*
* Purpose: Create a new object header message
*
- * Return: Success: The sequence number of the message that
- * was created.
+ * Return: Success: Non-negative
*
* Failure: Negative
*
@@ -183,165 +176,110 @@ done:
/*-------------------------------------------------------------------------
- * Function: H5O_msg_attr_to_dense_cb
+ * Function: H5O_msg_append
*
- * Purpose: Object header iterator callback routine to convert compact
- * attributes to dense attributes
+ * Purpose: Simplified version of H5O_msg_create, used when creating a new
+ * object header message (usually during object creation) and
+ * several messages will be added to the object header at once.
*
- * Return: Non-negative on success/Negative on failure
+ * Return: Success: Non-negative
+ *
+ * Failure: Negative
*
* Programmer: Quincey Koziol
- * koziol@hdfgroup.org
- * Dec 4 2006
+ * koziol@ncsa.uiuc.edu
+ * Dec 31 2002
*
*-------------------------------------------------------------------------
*/
-static herr_t
-H5O_msg_attr_to_dense_cb(H5O_t *oh, H5O_mesg_t *mesg/*in,out*/,
- unsigned UNUSED sequence, unsigned *oh_flags_ptr, void *_udata/*in,out*/)
+herr_t
+H5O_msg_append(H5F_t *f, hid_t dxpl_id, H5O_t *oh, unsigned type_id,
+ unsigned mesg_flags, unsigned update_flags, void *mesg,
+ unsigned *oh_flags_ptr)
{
- H5O_iter_to_dense_t *udata = (H5O_iter_to_dense_t *)_udata; /* Operator user data */
- herr_t ret_value = H5_ITER_CONT; /* Return value */
+ const H5O_msg_class_t *type; /* Original H5O class type for the ID */
+ htri_t shared_mesg; /* Should this message be stored in the Shared Message table? */
+ herr_t ret_value = SUCCEED; /* Return value */
- FUNC_ENTER_NOAPI_NOINIT(H5O_msg_attr_to_dense_cb)
+ FUNC_ENTER_NOAPI(H5O_msg_append, FAIL)
/* check args */
+ HDassert(f);
HDassert(oh);
+ HDassert(H5O_ATTR_ID != type_id); /* Attributes are modified in another routine */
+ HDassert(type_id < NELMTS(H5O_msg_class_g));
+ type = H5O_msg_class_g[type_id]; /* map the type ID to the actual type object */
+ HDassert(type);
+ HDassert(0 == (mesg_flags & ~H5O_MSG_FLAG_BITS));
HDassert(mesg);
+ HDassert(oh_flags_ptr);
- /* Insert attribute into dense storage */
- if(H5A_dense_insert(udata->f, udata->dxpl_id, oh, mesg->flags, mesg->native) < 0)
- HGOTO_ERROR(H5E_OHDR, H5E_CANTINSERT, H5_ITER_ERROR, "unable to add to dense storage")
-
- /* Convert message into a null message */
- if(H5O_release_mesg(udata->f, udata->dxpl_id, oh, mesg, TRUE, FALSE) < 0)
- HGOTO_ERROR(H5E_OHDR, H5E_CANTDELETE, H5_ITER_ERROR, "unable to convert into null message")
+ /* Should this message be written as a SOHM? */
+ if((shared_mesg = H5SM_try_share(f, dxpl_id, type_id, mesg)) > 0)
+ /* Mark the message as shared */
+ mesg_flags |= H5O_MSG_FLAG_SHARED;
+ else if(shared_mesg < 0)
+ HGOTO_ERROR(H5E_OHDR, H5E_WRITEERROR, FAIL, "error determining if message should be shared")
- /* Indicate that the object header was modified */
- *oh_flags_ptr |= H5AC__DIRTIED_FLAG;
+ /* Append new message to object header */
+ if(H5O_msg_append_real(f, dxpl_id, oh, type, mesg_flags, update_flags, mesg, oh_flags_ptr) < 0)
+ HGOTO_ERROR(H5E_ATTR, H5E_CANTINSERT, FAIL, "unable to create new message in header")
done:
FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5O_msg_attr_to_dense_cb() */
+} /* end H5O_msg_append() */
/*-------------------------------------------------------------------------
- * Function: H5O_msg_append
+ * Function: H5O_msg_append_real
*
- * Purpose: Simplified version of H5O_msg_create, used when creating a new
- * object header message (usually during object creation) and
- * several messages will be added to the object header at once.
+ * Purpose: Append a new message to an object header.
*
- * Return: Success: The sequence number of the message that
- * was created.
+ * Return: Success: Non-negative
*
* Failure: Negative
*
* Programmer: Quincey Koziol
- * koziol@ncsa.uiuc.edu
- * Dec 31 2002
+ * koziol@hdfgroup.org
+ * Dec 8 2006
*
*-------------------------------------------------------------------------
*/
herr_t
-H5O_msg_append(H5F_t *f, hid_t dxpl_id, H5O_t *oh, unsigned type_id,
+H5O_msg_append_real(H5F_t *f, hid_t dxpl_id, H5O_t *oh, const H5O_msg_class_t *type,
unsigned mesg_flags, unsigned update_flags, void *mesg,
unsigned *oh_flags_ptr)
{
const H5O_msg_class_t *new_type; /* Actual H5O class type for the ID */
const void *new_mesg; /* Actual message to write */
- const H5O_msg_class_t *type; /* Original H5O class type for the ID */
H5O_shared_t sh_mesg; /* Shared object header info */
unsigned idx; /* Index of message to modify */
- hbool_t new_format_attr; /* Whether this message is an attribute in a new-format header */
- htri_t shared_mesg; /* Should this message be stored in the Shared Message table? */
herr_t ret_value = SUCCEED; /* Return value */
- FUNC_ENTER_NOAPI(H5O_msg_append, FAIL)
+ FUNC_ENTER_NOAPI(H5O_msg_append_real, FAIL)
/* check args */
HDassert(f);
HDassert(oh);
- HDassert(type_id < NELMTS(H5O_msg_class_g));
- type = H5O_msg_class_g[type_id]; /* map the type ID to the actual type object */
HDassert(type);
HDassert(0 == (mesg_flags & ~H5O_MSG_FLAG_BITS));
HDassert(mesg);
HDassert(oh_flags_ptr);
- /* Should this message be written as a SOHM? */
- if((shared_mesg = H5SM_try_share(f, dxpl_id, type_id, mesg)) > 0)
- /* Mark the message as shared */
- mesg_flags |= H5O_MSG_FLAG_SHARED;
- else if(shared_mesg < 0)
- HGOTO_ERROR(H5E_OHDR, H5E_WRITEERROR, FAIL, "error determining if message should be shared")
-
- /* Set the flag for an attribute in a new format header */
- if(H5O_ATTR_ID == type_id && oh->version > H5O_VERSION_1)
- new_format_attr = TRUE;
- else
- new_format_attr = FALSE;
-
- /* If the message added is an attribute, check for dense storage */
- if(new_format_attr) {
-#ifdef QAK
-HDfprintf(stderr, "%s: adding attribute to new-style object header\n", FUNC);
-HDfprintf(stderr, "%s: oh->nattrs = %Hu\n", FUNC, oh->nattrs);
-HDfprintf(stderr, "%s: oh->max_compact = %u\n", FUNC, oh->max_compact);
-HDfprintf(stderr, "%s: oh->min_dense = %u\n", FUNC, oh->min_dense);
-#endif /* QAK */
- /* Check for switching to "dense" attribute storage */
- if(oh->nattrs == oh->max_compact && !H5F_addr_defined(oh->attr_fheap_addr)) {
- H5O_iter_to_dense_t udata; /* User data for callback */
- H5O_mesg_operator_t op; /* Wrapper for operator */
-#ifdef QAK
-HDfprintf(stderr, "%s: converting attributes to dense storage\n", FUNC);
-#endif /* QAK */
-
- /* Create dense storage for attributes */
- if(H5A_dense_create(f, dxpl_id, oh) < 0)
- HGOTO_ERROR(H5E_OHDR, H5E_CANTINIT, FAIL, "unable to create dense storage for attributes")
-
- /* Set up user data for callback */
- udata.f = f;
- udata.dxpl_id = dxpl_id;
-
- /* Iterate over existing attributes, moving them to dense storage */
- op.lib_op = H5O_msg_attr_to_dense_cb;
- if(H5O_msg_iterate_real(f, oh, H5O_MSG_ATTR, TRUE, op, &udata, dxpl_id, oh_flags_ptr) < 0)
- HGOTO_ERROR(H5E_OHDR, H5E_CANTCONVERT, FAIL, "error converting attributes to dense storage")
- } /* end if */
- } /* end if */
-
- /* Check for storing attribute with dense storage */
- if(new_format_attr && H5F_addr_defined(oh->attr_fheap_addr)) {
- /* Insert attribute into dense storage */
-#ifdef QAK
-HDfprintf(stderr, "%s: inserting attribute to dense storage\n", FUNC);
-#endif /* QAK */
- if(H5A_dense_insert(f, dxpl_id, oh, mesg_flags, mesg) < 0)
- HGOTO_ERROR(H5E_OHDR, H5E_CANTINSERT, FAIL, "unable to add to dense storage")
- } /* end if */
- else {
- /* Create a new message */
- if((idx = H5O_new_mesg(f, oh, &mesg_flags, type, mesg, &sh_mesg, &new_type, &new_mesg, dxpl_id, oh_flags_ptr)) == UFAIL)
- HGOTO_ERROR(H5E_OHDR, H5E_NOSPACE, FAIL, "unable to create new message")
+ /* Create a new message */
+ if((idx = H5O_new_mesg(f, oh, &mesg_flags, type, mesg, &sh_mesg, &new_type, &new_mesg, dxpl_id, oh_flags_ptr)) == UFAIL)
+ HGOTO_ERROR(H5E_OHDR, H5E_NOSPACE, FAIL, "unable to create new message")
- /* Write the information to the message */
- if(H5O_write_mesg(f, dxpl_id, oh, idx, new_type, new_mesg, mesg_flags, update_flags, oh_flags_ptr) < 0)
- HGOTO_ERROR(H5E_OHDR, H5E_CANTCOPY, FAIL, "unable to write message")
- } /* end else */
-
- /* If the message added is an attribute, increment count */
- if(new_format_attr)
- oh->nattrs++;
+ /* Write the information to the message */
+ if(H5O_write_mesg(f, dxpl_id, oh, idx, new_type, new_mesg, mesg_flags, update_flags, oh_flags_ptr) < 0)
+ HGOTO_ERROR(H5E_OHDR, H5E_CANTCOPY, FAIL, "unable to write message")
#ifdef H5O_DEBUG
H5O_assert(oh);
#endif /* H5O_DEBUG */
done:
FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5O_msg_append() */
+} /* end H5O_msg_append_real() */
/*-------------------------------------------------------------------------
diff --git a/src/H5Opkg.h b/src/H5Opkg.h
index f3a2df0..eea0102 100644
--- a/src/H5Opkg.h
+++ b/src/H5Opkg.h
@@ -392,6 +392,9 @@ H5_DLL herr_t H5O_delete_mesg(H5F_t *f, hid_t dxpl_id, H5O_mesg_t *mesg,
H5_DLL const H5O_obj_class_t *H5O_obj_class_real(H5O_t *oh);
/* Object header message routines */
+H5_DLL herr_t H5O_msg_append_real(H5F_t *f, hid_t dxpl_id, H5O_t *oh,
+ const H5O_msg_class_t *type, unsigned mesg_flags, unsigned update_flags,
+ void *mesg, unsigned *oh_flags_ptr);
H5_DLL void *H5O_msg_read_real(H5F_t *f, H5O_t *oh, unsigned type_id,
int sequence, void *mesg, hid_t dxpl_id);
H5_DLL void *H5O_msg_free_real(const H5O_msg_class_t *type, void *mesg);
diff --git a/src/H5Oprivate.h b/src/H5Oprivate.h
index 568a6ee..e578377 100644
--- a/src/H5Oprivate.h
+++ b/src/H5Oprivate.h
@@ -464,6 +464,7 @@ H5_DLL herr_t H5O_fill_convert(void *_fill, H5T_t *type, hid_t dxpl_id);
H5_DLL herr_t H5O_link_delete(H5F_t *f, hid_t dxpl_id, const void *_mesg, hbool_t adj_link);
/* Attribute operations */
+H5_DLL herr_t H5O_attr_create(const H5O_loc_t *loc, hid_t dxpl_id, struct H5A_t *attr);
H5_DLL herr_t H5O_attr_write(const H5O_loc_t *loc, hid_t dxpl_id,
struct H5A_t *attr);
H5_DLL herr_t H5O_attr_rename(const H5O_loc_t *loc, hid_t dxpl_id,