[svn-r23702] Issue 8380 - H5Zunregister caused seg fault. This is a porting of code from the trunk. It fixes the problem by first iterating

through all opened datasets and groups to see if any of them uses the filter.  If it finds one, the function fails with a message.  
Then the function flushes all opened files.

Tested with h5committest.

1 files changed, 40 insertions, 7 deletions

diff --git a/src/H5D.c b/src/H5D.c
index 3eed64a..4a21d69 100644
--- a/src/H5D.c
+++ b/src/H5D.c
@@ -572,19 +572,52 @@ done:
 hid_t
 H5Dget_create_plist(hid_t dset_id)
 {
-    H5D_t		*dset;                  /* Dataset structure */
+    H5D_t		*dataset;                  /* Dataset structure */
+    hid_t		ret_value = SUCCEED;    /* Return value */
+
+    FUNC_ENTER_API(FAIL)
+    H5TRACE1("i", "i", dset_id);
+
+    /* Check args */
+    if(NULL == (dataset = (H5D_t *)H5I_object_verify(dset_id, H5I_DATASET)))
+	HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a dataset")
+
+    if((ret_value = H5D_get_create_plist(dataset)) < 0)
+	HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a dataset")
+
+done:
+    FUNC_LEAVE_API(ret_value)
+} /* end H5Dget_create_plist() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:	H5D_get_create_plist
+ *
+ * Purpose:	Private function for H5Dget_create_plist
+ *
+ * Return:	Success:	ID for a copy of the dataset creation
+ *				property list.  The template should be
+ *				released by calling H5P_close().
+ *
+ *		Failure:	FAIL
+ *
+ * Programmer:	Robb Matzke
+ *		Tuesday, February  3, 1998
+ *
+ *-------------------------------------------------------------------------
+ */
+hid_t
+H5D_get_create_plist(H5D_t *dset)
+{
     H5P_genplist_t      *dcpl_plist;            /* Dataset's DCPL */
     H5P_genplist_t      *new_plist;             /* Copy of dataset's DCPL */
     H5O_fill_t          copied_fill;            /* Fill value to tweak */
     hid_t		new_dcpl_id = FAIL;
     hid_t		ret_value;              /* Return value */
 
-    FUNC_ENTER_API(FAIL)
-    H5TRACE1("i", "i", dset_id);
+    FUNC_ENTER_NOAPI(FAIL)
 
     /* Check args */
-    if(NULL == (dset = (H5D_t *)H5I_object_verify(dset_id, H5I_DATASET)))
-	HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a dataset")
     if(NULL == (dcpl_plist = (H5P_genplist_t *)H5I_object(dset->shared->dcpl_id)))
         HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "can't get property list")
 
@@ -670,8 +703,8 @@ done:
             if(H5I_dec_app_ref(new_dcpl_id) < 0)
                 HDONE_ERROR(H5E_DATASET, H5E_CANTDEC, FAIL, "unable to close temporary object")
 
-    FUNC_LEAVE_API(ret_value)
-} /* end H5Dget_create_plist() */
+    FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5D_get_create_plist() */
 
 
 /*-------------------------------------------------------------------------