[svn-r15368] Description:

    Bring back r15367 from the trunk:

    Add check to avoid mounting a file on a group twice, when the mounts
are done on the same HDF5 file, but opened with separate H5Fopen queries.

    Also add new 'mounted' flag to the H5G_info_t struct, queried with the
H5Gget_info() API call, to allow applications to detect and avoid this
situation.

Tested on:
    Mac OS X/32 10.5.4 (amazon)
    Linux/64 10.5.4 (chicago)

1 files changed, 7 insertions, 0 deletions

diff --git a/src/H5Gprivate.h b/src/H5Gprivate.h
index c54f11d..ab6abc1 100644
--- a/src/H5Gprivate.h
+++ b/src/H5Gprivate.h
@@ -101,6 +101,12 @@
                                                     H5G_CRT_GINFO_EST_NAME_LEN \
                                                 }
 
+/* If the module using this macro is allowed access to the private variables, access them directly */
+#ifdef H5G_PACKAGE
+#define H5G_MOUNTED(G)              ((G)->shared->mounted)
+#else /* H5G_PACKAGE */
+#define H5G_MOUNTED(G)              (H5G_mounted(G))
+#endif /* H5G_PACKAGE */
 
 /* Type of operation being performed for call to H5G_name_replace() */
 typedef enum {
@@ -158,6 +164,7 @@ H5_DLL herr_t H5G_close(H5G_t *grp);
 H5_DLL herr_t H5G_free_grp_name(H5G_t *grp);
 H5_DLL herr_t H5G_get_shared_count(H5G_t *grp);
 H5_DLL herr_t H5G_mount(H5G_t *grp);
+H5_DLL hbool_t H5G_mounted(H5G_t *grp);
 H5_DLL herr_t H5G_unmount(H5G_t *grp);
 #ifndef H5_NO_DEPRECATED_SYMBOLS
 H5_DLL H5G_obj_t H5G_map_obj_type(H5O_type_t obj_type);