[svn-r15367] Description:

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

    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.

    This probably fixes Bz#1070 also, I'll check with Dan Anov (who reported
a different sort of behavior, but seems to have the same underlying problem).

Tested on:
    Mac OS X/32 10.5.4 (amazon)
    Linux/64 2.6 (chicago)

1 files changed, 24 insertions, 0 deletions

diff --git a/src/H5G.c b/src/H5G.c
index 0fa2c1c..e04402e 100644
--- a/src/H5G.c
+++ b/src/H5G.c
@@ -1526,6 +1526,30 @@ H5G_mount(H5G_t *grp)
 
 
 /*-------------------------------------------------------------------------
+ * Function:	H5G_mounted
+ *
+ * Purpose:	Retrieves the 'mounted' flag for a group
+ *
+ * Return:	Non-negative on success/Negative on failure
+ *
+ * Programmer:	Quincey Koziol
+ *		Tuesday, July 15, 2008
+ *
+ *-------------------------------------------------------------------------
+ */
+hbool_t
+H5G_mounted(H5G_t *grp)
+{
+    FUNC_ENTER_NOAPI_NOINIT_NOFUNC(H5G_mounted)
+
+    /* Check args */
+    HDassert(grp && grp->shared);
+
+    FUNC_LEAVE_NOAPI(grp->shared->mounted)
+} /* end H5G_mounted() */
+
+
+/*-------------------------------------------------------------------------
  * Function:	H5G_unmount
  *
  * Purpose:	Resets the 'mounted' flag for a group