[svn-r22164] Fixed a bug in H5Ocopy(): When copying an opened object, call the object's

flush class action to ensure that cached data is flushed so that H5Ocopy will get
the correct data.  (HDFFV-7853)

10 files changed, 408 insertions, 12 deletions

diff --git a/release_docs/RELEASE.txt b/release_docs/RELEASE.txt
index 6992d8c..6c61597 100644
--- a/release_docs/RELEASE.txt
+++ b/release_docs/RELEASE.txt
@@ -373,6 +373,10 @@ Bug Fixes since HDF5-1.8.0 release
 
     Library
     -------
+      - Fixed a bug in H5Ocopy(): When copying an opened object, call the
+	    object's flush class action to ensure that cached data is flushed
+            so that H5Ocopy will get the correct data.  
+	    (VC - 2012/3/27 - HDFFV-7853)
       - When an application tries to write or read many small data chunks and
             runs out of memory, the library had a seg fault.  The fix is to 
             return the error stack with proper information. (SLU - 2012/3/23.
diff --git a/src/H5Dint.c b/src/H5Dint.c
index 9a80bfc..5c905bb 100644
--- a/src/H5Dint.c
+++ b/src/H5Dint.c
@@ -68,7 +68,6 @@ static herr_t H5D_init_space(H5F_t *file, const H5D_t *dset, const H5S_t *space)
 static herr_t H5D_update_oh_info(H5F_t *file, hid_t dxpl_id, H5D_t *dset,
     hid_t dapl_id);
 static herr_t H5D_open_oid(H5D_t *dataset, hid_t dapl_id, hid_t dxpl_id);
-static herr_t H5D_flush_real(H5D_t *dataset, hid_t dxpl_id);
 
 
 /*********************/
diff --git a/src/H5Doh.c b/src/H5Doh.c
index 7a657ec..e6a715f 100644
--- a/src/H5Doh.c
+++ b/src/H5Doh.c
@@ -56,6 +56,8 @@ static H5O_loc_t *H5O_dset_get_oloc(hid_t obj_id);
 static herr_t H5O_dset_bh_info(H5F_t *f, hid_t dxpl_id, H5O_t *oh,
     H5_ih_info_t *bh_info);
 
+static herr_t H5O_dset_flush(H5G_loc_t *obj_loc, hid_t dxpl_id);
+
 
 /*********************/
 /* Package Variables */
@@ -81,7 +83,8 @@ const H5O_obj_class_t H5O_OBJ_DATASET[1] = {{
     H5O_dset_open, 		/* open an object of this class */
     H5O_dset_create, 		/* create an object of this class */
     H5O_dset_get_oloc, 		/* get an object header location for an object */
-    H5O_dset_bh_info 		/* get the index & heap info for an object */
+    H5O_dset_bh_info, 		/* get the index & heap info for an object */
+    H5O_dset_flush 		/* flush an opened object of this class */
 }};
 
 /* Declare a free list to manage the H5D_copy_file_ud_t struct */
@@ -431,3 +434,48 @@ done:
     FUNC_LEAVE_NOAPI(ret_value)
 } /* end H5O_dset_bh_info() */
 
+
+/*-------------------------------------------------------------------------
+ * Function:    H5O_dset_flush
+ *
+ * Purpose:     To flush any dataset information cached in memory
+ *
+ * Return:      Success:        non-negative
+ *              Failure:        negative
+ *
+ * Programmer:  Vailin Choi
+ *              February 2012
+ *
+ *-------------------------------------------------------------------------
+ */
+static herr_t
+H5O_dset_flush(H5G_loc_t *obj_loc, hid_t dxpl_id)
+{
+    H5D_t       *dset;                  /* Dataset opened */
+    H5O_type_t 	obj_type;              /* Type of object at location */
+    herr_t      ret_value = SUCCEED;    /* Return value */
+
+    FUNC_ENTER_NOAPI_NOINIT
+
+    HDassert(obj_loc);
+    HDassert(obj_loc->oloc);
+
+    /* Check that the object found is the correct type */
+    if(H5O_obj_type(obj_loc->oloc, &obj_type, dxpl_id) < 0)
+        HGOTO_ERROR(H5E_DATASET, H5E_CANTGET, FAIL, "can't get object type")
+
+    if(obj_type != H5O_TYPE_DATASET)
+        HGOTO_ERROR(H5E_DATASET, H5E_BADTYPE, FAIL, "not a dataset")
+
+    /* Open the dataset */
+    if(NULL == (dset = H5D_open(obj_loc, H5P_DATASET_ACCESS_DEFAULT, dxpl_id)))
+        HGOTO_ERROR(H5E_DATASET, H5E_CANTOPENOBJ, FAIL, "unable to open dataset")
+    
+    if(H5D_flush_real(dset, dxpl_id) < 0)
+	HDONE_ERROR(H5E_DATASET, H5E_WRITEERROR, FAIL, "unable to flush cached dataset info")
+
+done:
+    if(dset && H5D_close(dset) < 0)
+	HDONE_ERROR(H5E_DATASET, H5E_CLOSEERROR, NULL, "unable to release dataset")
+    FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5O_dset_flush() */
diff --git a/src/H5Dpkg.h b/src/H5Dpkg.h
index 16de07f..40317f3 100644
--- a/src/H5Dpkg.h
+++ b/src/H5Dpkg.h
@@ -548,6 +548,7 @@ H5_DLL herr_t H5D_set_extent(H5D_t *dataset, const hsize_t *size, hid_t dxpl_id)
 H5_DLL herr_t H5D_get_dxpl_cache(hid_t dxpl_id, H5D_dxpl_cache_t **cache);
 H5_DLL herr_t H5D_flush_sieve_buf(H5D_t *dataset, hid_t dxpl_id);
 H5_DLL herr_t H5D_mark(H5D_t *dataset, hid_t dxpl_id, unsigned flags);
+H5_DLL herr_t H5D_flush_real(H5D_t *dataset, hid_t dxpl_id);
 
 /* Functions that perform direct serial I/O operations */
 H5_DLL herr_t H5D_select_read(const H5D_io_info_t *io_info,
diff --git a/src/H5Goh.c b/src/H5Goh.c
index 194e3ec..c6115db 100644
--- a/src/H5Goh.c
+++ b/src/H5Goh.c
@@ -81,7 +81,8 @@ const H5O_obj_class_t H5O_OBJ_GROUP[1] = {{
     H5O_group_open, 		/* open an object of this class */
     H5O_group_create, 		/* create an object of this class */
     H5O_group_get_oloc,		/* get an object header location for an object */
-    H5O_group_bh_info 		/* get the index & heap info for an object */
+    H5O_group_bh_info, 		/* get the index & heap info for an object */
+    NULL 			/* flush an opened object of this class */
 }};
 
 /* Declare the external free list to manage the H5O_ginfo_t struct */
diff --git a/src/H5O.c b/src/H5O.c
index 50d9c23..104a9ae 100644
--- a/src/H5O.c
+++ b/src/H5O.c
@@ -79,12 +79,12 @@ typedef struct {
 /********************/
 
 static herr_t H5O_delete_oh(H5F_t *f, hid_t dxpl_id, H5O_t *oh);
-static const H5O_obj_class_t *H5O_obj_class(const H5O_loc_t *loc, hid_t dxpl_id);
 static herr_t H5O_obj_type_real(H5O_t *oh, H5O_type_t *obj_type);
 static herr_t H5O_visit(hid_t loc_id, const char *obj_name, H5_index_t idx_type,
     H5_iter_order_t order, H5O_iterate_t op, void *op_data, hid_t lapl_id,
     hid_t dxpl_id);
 static herr_t H5O_get_hdr_info_real(const H5O_t *oh, H5O_hdr_info_t *hdr);
+static const H5O_obj_class_t *H5O_obj_class_real(H5O_t *oh);
 
 
 /*********************/
@@ -2364,7 +2364,7 @@ H5O_obj_type_real(H5O_t *oh, H5O_type_t *obj_type)
  *
  *-------------------------------------------------------------------------
  */
-static const H5O_obj_class_t *
+const H5O_obj_class_t *
 H5O_obj_class(const H5O_loc_t *loc, hid_t dxpl_id)
 {
     H5O_t	*oh = NULL;                     /* Object header for location */
@@ -2401,7 +2401,7 @@ done:
  *
  *-------------------------------------------------------------------------
  */
-const H5O_obj_class_t *
+static const H5O_obj_class_t *
 H5O_obj_class_real(H5O_t *oh)
 {
     size_t	i;                      /* Local index variable */
diff --git a/src/H5Ocopy.c b/src/H5Ocopy.c
index dd649ff..e2d792a 100644
--- a/src/H5Ocopy.c
+++ b/src/H5Ocopy.c
@@ -38,6 +38,7 @@
 #include "H5FLprivate.h"	/* Free lists                           */
 #include "H5Iprivate.h"		/* IDs			  		*/
 #include "H5HGprivate.h"        /* Global Heaps                         */
+#include "H5FOprivate.h"        /* File objects                         */
 #include "H5Lprivate.h"         /* Links			  	*/
 #include "H5MFprivate.h"	/* File memory management		*/
 #include "H5MMprivate.h"	/* Memory management			*/
@@ -281,6 +282,13 @@ done:
  * Programmer:  Peter Cao
  *              May 30, 2005
  *
+ * Modifications:
+ *	Vailin Choi; Feb 2012
+ *	Bug fix for HDFFV-7853
+ *	When the object is opened, call the object's flush class action
+ *	to ensure that cached data is flushed so that H5Ocopy will get
+ *	the correct data.
+ *	
  *-------------------------------------------------------------------------
  */
 static herr_t
@@ -316,14 +324,33 @@ H5O_copy_header_real(const H5O_loc_t *oloc_src, H5O_loc_t *oloc_dst /*out */,
     HDassert(oloc_dst->file);
     HDassert(cpy_info);
 
+    /* Get pointer to object class for this object */
+    if((obj_class = H5O_obj_class(oloc_src, dxpl_id)) == NULL)
+        HGOTO_ERROR(H5E_OHDR, H5E_CANTINIT, FAIL, "unable to determine object type")
+
+    /* Check if the object at the address is already open in the file */
+    if(H5FO_opened(oloc_src->file, oloc_src->addr) != NULL) {
+	
+	H5G_loc_t   tmp_loc; 	/* Location of object */
+	H5O_loc_t   tmp_oloc; 	/* Location of object */
+	H5G_name_t  tmp_path;	/* Object's path */
+
+	tmp_loc.oloc = &tmp_oloc;
+	tmp_loc.path = &tmp_path;
+	tmp_oloc.file = oloc_src->file;
+	tmp_oloc.addr = oloc_src->addr;
+	tmp_oloc.holding_file = oloc_src->holding_file;
+	H5G_name_reset(tmp_loc.path);
+
+	/* Flush the object of this class */
+        if(obj_class->flush && obj_class->flush(&tmp_loc, dxpl_id) < 0)
+            HGOTO_ERROR(H5E_OHDR, H5E_CANTFLUSH, FAIL, "unable to flush object")
+    }
+
     /* Get source object header */
     if(NULL == (oh_src = H5O_protect(oloc_src, dxpl_id, H5AC_READ)))
         HGOTO_ERROR(H5E_OHDR, H5E_CANTPROTECT, FAIL, "unable to load object header")
 
-    /* Get pointer to object class for this object */
-    if(NULL == (obj_class = H5O_obj_class_real(oh_src)))
-        HGOTO_ERROR(H5E_OHDR, H5E_CANTINIT, FAIL, "unable to determine object type")
-
     /* Retrieve user data for particular type of object to copy */
     if(obj_class->get_copy_file_udata &&
             (NULL == (cpy_udata = (obj_class->get_copy_file_udata)())))
diff --git a/src/H5Opkg.h b/src/H5Opkg.h
index a5d01bd..d4df79b 100644
--- a/src/H5Opkg.h
+++ b/src/H5Opkg.h
@@ -325,6 +325,7 @@ typedef struct H5O_obj_class_t {
     void	*(*create)(H5F_t *, void *, H5G_loc_t *, hid_t );	/*create an object of this class */
     H5O_loc_t	*(*get_oloc)(hid_t );		/*get the object header location for an object */
     herr_t      (*bh_info)(H5F_t *f, hid_t dxpl_id, H5O_t *oh, H5_ih_info_t *bh_info); /*get the index & heap info for an object */
+    herr_t      (*flush)(H5G_loc_t *loc, hid_t dxpl_id); 		/*flush an opened object of this class */
 } H5O_obj_class_t;
 
 /* Node in skip list to map addresses from one file to another during object header copy */
@@ -527,7 +528,7 @@ H5_DLL herr_t H5O_msg_flush(H5F_t *f, H5O_t *oh, H5O_mesg_t *mesg);
 H5_DLL herr_t H5O_flush_msgs(H5F_t *f, H5O_t *oh);
 H5_DLL hid_t H5O_open_by_loc(const H5G_loc_t *obj_loc, hid_t lapl_id, hid_t dxpl_id, hbool_t app_ref);
 H5_DLL herr_t H5O_delete_mesg(H5F_t *f, hid_t dxpl_id, H5O_t *open_oh, H5O_mesg_t *mesg);
-H5_DLL const H5O_obj_class_t *H5O_obj_class_real(H5O_t *oh);
+H5_DLL const H5O_obj_class_t * H5O_obj_class(const H5O_loc_t *loc, hid_t dxpl_id);
 H5_DLL int H5O_link_oh(H5F_t *f, int adjust, hid_t dxpl_id, H5O_t *oh, hbool_t *deleted);
 H5_DLL herr_t H5O_inc_rc(H5O_t *oh);
 H5_DLL herr_t H5O_dec_rc(H5O_t *oh);
diff --git a/src/H5Toh.c b/src/H5Toh.c
index 5878075..be853f1 100644
--- a/src/H5Toh.c
+++ b/src/H5Toh.c
@@ -77,7 +77,8 @@ const H5O_obj_class_t H5O_OBJ_DATATYPE[1] = {{
     H5O_dtype_open, 		/* open an object of this class */
     H5O_dtype_create, 		/* create an object of this class */
     H5O_dtype_get_oloc,		/* get an object header location for an object */
-    NULL 			/* get the index & heap info for an object */
+    NULL,			/* get the index & heap info for an object */
+    NULL 			/* flush an opened object of this class */
 }};
 
 
diff --git a/test/objcopy.c b/test/objcopy.c
index 5c20ee8..9188713 100644
--- a/test/objcopy.c
+++ b/test/objcopy.c
@@ -8388,6 +8388,319 @@ error:
 
 
 /*-------------------------------------------------------------------------
+ * Function:    test_copy_dataset_open
+ *
+ * Purpose:     To ensure that H5Ocopy() copies data of opened dataset correctly.
+ *		This is for bug fix HDFFV-7853.
+ *
+ *		Test Case 1:
+ *		Create a dataset with attributes in SRC file
+ *		Copy the opened dataset to another location in the same file
+ *		Copy the opened dataset to DST file
+ *		Close the dataset
+ *
+ *		Test Case 2:
+ *		Reopen the dataset, write new data to the dataset
+ *		Copy the opened dataset to another location in the same file
+ *		Copy the opened dataset to to DST file
+ *		Close the dataset
+ *
+ *		Test Case 3:
+ *		Create a committed datatype
+ *		Create a dataset with the committed datatype in SRC file
+ *		Open the committed datatype
+ *		Copy the opened dataset (with the opened committed datatype) to another location in the same file
+ *		Copy the opened dataset (with the opened committed datatype) to DST file
+ *		Close the dataset and the committed datatype
+ *
+ *		Test Case 4:
+ *		Create a group with attributes, create a dataset in the group
+ *		Copy the opened group (together with the opened dataset) to another location in the same file
+ *		Copy the opened group (together with the opened dataset) to DST file
+ *		Close the group and the dataset
+ *
+ * Return:      Success:        0
+ *              Failure:        number of errors
+ *
+ * Programmer:  Vailin Choi
+ *              Feb 7, 2012
+ *
+ * Modifications:
+ *
+ *-------------------------------------------------------------------------
+ */
+static int
+test_copy_dataset_open(hid_t fcpl_src, hid_t fcpl_dst, hid_t src_fapl, hid_t dst_fapl)
+{
+    hid_t fid_src = -1, fid_dst = -1;           /* File IDs */
+    hid_t sid = -1;                             /* Dataspace ID */
+    hid_t tid = -1;                             /* Datatype ID */
+    hid_t did = -1, did2 = -1;                  /* Dataset IDs */
+    hid_t gid = -1, gid2 = -1;                  /* Group IDs */
+    int buf[DIM_SIZE_1][DIM_SIZE_2];            /* Buffer for writing data */
+    int newbuf[DIM_SIZE_1][DIM_SIZE_2];		/* Buffer for writing data */
+    hsize_t dim2d[2];                           /* Dataset dimensions */
+    int i, j;                                   /* local index variables */
+    char src_filename[NAME_BUF_SIZE];
+    char dst_filename[NAME_BUF_SIZE];
+
+    TESTING("H5Ocopy(): copying objects while opened");
+
+    /* Initialize write buffer */
+    for (i=0; i<DIM_SIZE_1; i++)
+        for (j=0; j<DIM_SIZE_2; j++)
+            buf[i][j] = 10000 + 100*i+j;
+
+    /* Initialize another write buffer */
+    for (i=0; i<DIM_SIZE_1; i++)
+        for (j=0; j<DIM_SIZE_2; j++)
+            newbuf[i][j] = 100*i+j;
+
+    /* Initialize the filenames */
+    h5_fixname(FILENAME[0], src_fapl, src_filename, sizeof src_filename);
+    h5_fixname(FILENAME[1], dst_fapl, dst_filename, sizeof dst_filename);
+
+    /* Reset file address checking info */
+    addr_reset();
+
+    /* create source file */
+    if((fid_src = H5Fcreate(src_filename, H5F_ACC_TRUNC, fcpl_src, src_fapl)) < 0) TEST_ERROR
+
+    /* create destination file */
+    if((fid_dst = H5Fcreate(dst_filename, H5F_ACC_TRUNC, fcpl_dst, dst_fapl)) < 0) TEST_ERROR
+
+    /* Create an uncopied object in destination file so that addresses in source and destination files aren't the same */
+    if(H5Gclose(H5Gcreate2(fid_dst, NAME_GROUP_UNCOPIED, H5P_DEFAULT, H5P_DEFAULT, H5P_DEFAULT)) < 0) TEST_ERROR
+
+    /* Set dataspace dimensions */
+    dim2d[0] = DIM_SIZE_1;
+    dim2d[1] = DIM_SIZE_2;
+
+    /* create 2D dataspace */
+    if((sid = H5Screate_simple(2, dim2d, NULL)) < 0) TEST_ERROR
+
+    /* create 2D int dataset in SRC file */
+    if((did = H5Dcreate2(fid_src, NAME_DATASET_SIMPLE, H5T_NATIVE_INT, sid, H5P_DEFAULT, H5P_DEFAULT, H5P_DEFAULT)) < 0) TEST_ERROR
+
+    /* write data to the dataset */
+    if(H5Dwrite(did, H5T_NATIVE_INT, H5S_ALL, H5S_ALL, H5P_DEFAULT, buf) < 0) TEST_ERROR
+
+    /* attach attributes to the dataset */
+    if(test_copy_attach_attributes(did, H5T_NATIVE_INT) < 0) TEST_ERROR
+
+    /* 
+     * Test case 1 
+     */
+
+    /* 
+     * Copy within the same file
+     */
+    /* copy the opened dataset to another location in SRC file */
+    if(H5Ocopy(fid_src, NAME_DATASET_SIMPLE, fid_src, NAME_DATASET_SIMPLE2, H5P_DEFAULT, H5P_DEFAULT) < 0) TEST_ERROR
+
+    /* open the copied dataset */
+    if((did2 = H5Dopen2(fid_src, NAME_DATASET_SIMPLE2, H5P_DEFAULT)) < 0) TEST_ERROR
+
+    /* Check if the datasets are equal */
+    if(compare_datasets(did, did2, H5P_DEFAULT, buf) != TRUE) TEST_ERROR
+
+    /* close the copied dataset */
+    if(H5Dclose(did2) < 0) TEST_ERROR
+
+    /* 
+     * Copy to another file
+     */
+    /* copy the opened dataset from SRC to DST */
+    if(H5Ocopy(fid_src, NAME_DATASET_SIMPLE, fid_dst, NAME_DATASET_SIMPLE, H5P_DEFAULT, H5P_DEFAULT) < 0) TEST_ERROR
+
+    /* open the copied dataset in DST file */
+    if((did2 = H5Dopen2(fid_dst, NAME_DATASET_SIMPLE, H5P_DEFAULT)) < 0) TEST_ERROR
+
+    /* Check if the datasets are equal */
+    if(compare_datasets(did, did2, H5P_DEFAULT, buf) != TRUE) TEST_ERROR
+
+    /* close the copied dataset in DST file */
+    if(H5Dclose(did2) < 0) TEST_ERROR
+
+    /* close the dataset in SRC file */
+    if(H5Dclose(did) < 0) TEST_ERROR
+
+    /* 
+     * Test case 2 
+     */
+    /* reopen the dataset in SRC file */
+    if((did = H5Dopen2(fid_src, NAME_DATASET_SIMPLE, H5P_DEFAULT)) < 0) TEST_ERROR
+
+    /* write another set of data to the dataset */
+    if(H5Dwrite(did, H5T_NATIVE_INT, H5S_ALL, H5S_ALL, H5P_DEFAULT, newbuf) < 0) TEST_ERROR
+
+    /* 
+     * Copy within the same file
+     */
+    /* copy the opened dataset to another location in SRC file */
+    if(H5Ocopy(fid_src, NAME_DATASET_SIMPLE, fid_src, "NEW_DATASET", H5P_DEFAULT, H5P_DEFAULT) < 0) TEST_ERROR
+
+    /* open the copied dataset */
+    if((did2 = H5Dopen2(fid_src, "NEW_DATASET", H5P_DEFAULT)) < 0) TEST_ERROR
+
+    /* Check if the datasets are equal */
+    if(compare_datasets(did, did2, H5P_DEFAULT, newbuf) != TRUE) TEST_ERROR
+
+    /* close the copied dataset in SRC file */
+    if(H5Dclose(did2) < 0) TEST_ERROR
+    /* 
+     * Copy to another file
+     */
+    /* copy the opened dataset from SRC to DST */
+    if(H5Ocopy(fid_src, NAME_DATASET_SIMPLE, fid_dst, "NEW_DATASET", H5P_DEFAULT, H5P_DEFAULT) < 0) TEST_ERROR
+
+    /* open the copied dataset in DST file */
+    if((did2 = H5Dopen2(fid_dst, "NEW_DATASET", H5P_DEFAULT)) < 0) TEST_ERROR
+
+    /* Check if the datasets are equal */
+    if(compare_datasets(did, did2, H5P_DEFAULT, newbuf) != TRUE) TEST_ERROR
+
+    /* close the copied dataset in DST file */
+    if(H5Dclose(did2) < 0) TEST_ERROR
+
+    /* close the dataset at SRC file */
+    if(H5Dclose(did) < 0) TEST_ERROR
+
+    /* 
+     * Test case 3 
+     */
+
+    /* make a copy of the datatype */
+    if((tid = H5Tcopy(H5T_NATIVE_INT)) < 0)TEST_ERROR
+
+    /* commit the datatype */
+    if((H5Tcommit2(fid_src, NAME_DATATYPE_SIMPLE, tid, H5P_DEFAULT, H5P_DEFAULT, H5P_DEFAULT)) < 0) TEST_ERROR
+
+    /* close the datatype */
+    if(H5Tclose(tid) < 0) TEST_ERROR
+
+    /* open the committed datatype */
+    tid = H5Topen2(fid_src, NAME_DATATYPE_SIMPLE, H5P_DEFAULT);
+
+    /* create 2D dataset with the opened committed datatype in SRC file */
+    if((did = H5Dcreate2(fid_src, NAME_DATASET_NAMED_DTYPE, tid, sid, H5P_DEFAULT, H5P_DEFAULT, H5P_DEFAULT)) < 0) TEST_ERROR
+
+    /* write data to the dataset */
+    if(H5Dwrite(did, tid, H5S_ALL, H5S_ALL, H5P_DEFAULT, buf) < 0) TEST_ERROR
+
+    /* 
+     * Copy within the same file
+     */
+    /* copy the opened dataset (with the opened committed datatype) to another location in SRC file */
+    if(H5Ocopy(fid_src, NAME_DATASET_NAMED_DTYPE, fid_src, NAME_DATASET_NAMED_DTYPE2, H5P_DEFAULT, H5P_DEFAULT) < 0) TEST_ERROR
+
+    /* open the copied dataset */
+    if((did2 = H5Dopen2(fid_src, NAME_DATASET_NAMED_DTYPE2, H5P_DEFAULT)) < 0) TEST_ERROR
+
+    /* Check if the datasets are equal */
+    if(compare_datasets(did, did2, H5P_DEFAULT, buf) != TRUE) TEST_ERROR
+
+    /* close the copied dataset in SRC file */
+    if(H5Dclose(did2) < 0) TEST_ERROR
+
+    /* 
+     * Copy to another file
+     */
+    /* copy the opened dataset (with the opened committed datatype) from SRC to DST */
+    if(H5Ocopy(fid_src, NAME_DATASET_NAMED_DTYPE, fid_dst, NAME_DATASET_NAMED_DTYPE2, H5P_DEFAULT, H5P_DEFAULT) < 0) TEST_ERROR
+
+    /* open the copied dataset in DST file */
+    if((did2 = H5Dopen2(fid_dst, NAME_DATASET_NAMED_DTYPE2, H5P_DEFAULT)) < 0) TEST_ERROR
+
+    /* Check if the datasets are equal */
+    if(compare_datasets(did, did2, H5P_DEFAULT, buf) != TRUE) TEST_ERROR
+
+    /* close the copied dataset in DST file */
+    if(H5Dclose(did2) < 0) TEST_ERROR
+
+    /* close the dataset at SRC file */
+    if(H5Dclose(did) < 0) TEST_ERROR
+
+    /* close the committed datatype at SRC file */
+    if(H5Tclose(tid) < 0) TEST_ERROR
+
+    /* 
+     * Test case 4 
+     */
+    /* create a group in SRC file */
+    if((gid = H5Gcreate2(fid_src, NAME_GROUP_TOP, H5P_DEFAULT, H5P_DEFAULT, H5P_DEFAULT)) < 0) TEST_ERROR
+
+    /* attach attributes to the group */
+    if(test_copy_attach_attributes(gid, H5T_NATIVE_INT) < 0) TEST_ERROR
+
+    /* create 2D int dataset in the group at SRC file */
+    if((did = H5Dcreate2(gid, NAME_DATASET_SIMPLE, H5T_NATIVE_INT, sid, H5P_DEFAULT, H5P_DEFAULT, H5P_DEFAULT)) < 0) TEST_ERROR
+
+    /* write data to the dataset */
+    if(H5Dwrite(did, H5T_NATIVE_INT, H5S_ALL, H5S_ALL, H5P_DEFAULT, buf) < 0) TEST_ERROR
+    /* 
+     * Copy within the same file
+     */
+    /* copy the opened group (together with opened dataset) to another location in SRC file */
+    if(H5Ocopy(fid_src, NAME_GROUP_TOP, fid_src, "COPIED_GROUP", H5P_DEFAULT, H5P_DEFAULT) < 0) TEST_ERROR
+
+    /* open the copied group at SRC */
+    if((gid2 = H5Gopen2(fid_src, "COPIED_GROUP", H5P_DEFAULT)) < 0) TEST_ERROR
+
+    /* Check if the groups are equal */
+    if(compare_groups(gid, gid2, H5P_DEFAULT, -1, 0) != TRUE) TEST_ERROR
+
+    /* close the DST dataset */
+    if(H5Gclose(gid2) < 0) TEST_ERROR
+
+    /* 
+     * Copy to another file
+     */
+    /* copy the opened group (together with opened dataset) to DST file */
+    if(H5Ocopy(fid_src, NAME_GROUP_TOP, fid_dst, "COPIED_GROUP", H5P_DEFAULT, H5P_DEFAULT) < 0) TEST_ERROR
+
+    /* open the copied group at DST */
+    if((gid2 = H5Gopen2(fid_dst, "COPIED_GROUP", H5P_DEFAULT)) < 0) TEST_ERROR
+
+    /* Check if the groups are equal */
+    if(compare_groups(gid, gid2, H5P_DEFAULT, -1, 0) != TRUE) TEST_ERROR
+
+    /* close the group in DST file */
+    if(H5Gclose(gid2) < 0) TEST_ERROR
+
+    /* close the group in SRC file */
+    if(H5Gclose(gid) < 0) TEST_ERROR
+
+    /* close the dataset in SRC file */
+    if(H5Dclose(did) < 0) TEST_ERROR
+
+    /* close dataspace */
+    if(H5Sclose(sid) < 0) TEST_ERROR
+
+    /* close the SRC file */
+    if(H5Fclose(fid_src) < 0) TEST_ERROR
+
+    /* close the DST file */
+    if(H5Fclose(fid_dst) < 0) TEST_ERROR
+
+    PASSED();
+    return 0;
+
+error:
+    H5E_BEGIN_TRY {
+    	H5Dclose(did);
+    	H5Dclose(did2);
+    	H5Sclose(sid);
+    	H5Gclose(gid);
+    	H5Gclose(gid2);
+    	H5Fclose(fid_dst);
+    	H5Fclose(fid_src);
+    } H5E_END_TRY;
+    return 1;
+} /* end test_copy_dataset_open */
+
+
+/*-------------------------------------------------------------------------
  * Function:   	main
  *
  * Purpose:     Test H5Ocopy()
@@ -8555,6 +8868,7 @@ main(void)
         nerrors += test_copy_option(fcpl_src, fcpl_dst, src_fapl, dst_fapl,
                     H5O_COPY_WITHOUT_ATTR_FLAG | H5O_COPY_PRESERVE_NULL_FLAG,
                     TRUE, "H5Ocopy(): preserve NULL messages");
+        nerrors += test_copy_dataset_open(fcpl_src, fcpl_dst, src_fapl, dst_fapl);
 
         /* Tests that do not use attributes and do not need to be tested
          * multiple times for different attribute configurations */