[svn-r12528] Added User-Defined links to the library.

Users can create external links using H5L_create_external().  These links
point to an object in another HDF5 file.  Users can alter the behavior of
external links or create new kinds of links by registering callbacks
using the H5L interface.

Added tests, tools support, etc.

Also a number of other, minor changes have been made (some restructuring of
the H5L interface, for instance).

Additional documentation and examples are forthcoming.

1 files changed, 15 insertions, 0 deletions

diff --git a/src/H5T.c b/src/H5T.c
index 744e7f3..44ac21f 100644
--- a/src/H5T.c
+++ b/src/H5T.c
@@ -733,6 +733,7 @@ H5T_init_interface(void)
     herr_t	status;
     unsigned    copied_dtype=1;         /* Flag to indicate whether datatype was copied or allocated (for error cleanup) */
     H5P_genclass_t  *crt_pclass;        /* Property list class for datatype creation properties */
+    H5P_genclass_t  *acc_pclass;        /* Property list class for datatype access properties */
     herr_t	ret_value=SUCCEED;
 
     FUNC_ENTER_NOAPI_NOINIT(H5T_init_interface);
@@ -1325,6 +1326,20 @@ H5T_init_interface(void)
              HGOTO_ERROR(H5E_PLIST, H5E_CANTREGISTER, FAIL, "can't insert property into class")
     } /* end if */
 
+    /* ========== Datatype Access Property Class Initialization ============*/
+    assert(H5P_CLS_DATATYPE_ACCESS_g!=-1);
+
+    /* Get the pointer to dataset access class */
+    if(NULL == (acc_pclass = H5I_object(H5P_CLS_DATATYPE_ACCESS_g)))
+         HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a property list class")
+
+    /* Only register the default property list if it hasn't been created yet */
+    if(H5P_LST_DATATYPE_ACCESS_g == (-1)) {
+        /* Register the default dataset access property list */
+        if((H5P_LST_DATATYPE_ACCESS_g = H5P_create_id(acc_pclass))<0)
+             HGOTO_ERROR(H5E_PLIST, H5E_CANTREGISTER, FAIL, "can't insert property into class")
+    } /* end if */
+
 done:
     /* General cleanup */
     if (compound!=NULL)