All DMS opened by a program are now listed and closed with atexit system

python/obitools3/dms/capi/obidms.pxd

@@ -17,6 +17,7 @@ cdef extern from "obidms.h" nogil:
     int obi_close_dms(OBIDMS_p dms)
     char* obi_dms_get_dms_path(OBIDMS_p dms)
     char* obi_dms_get_full_path(OBIDMS_p dms, const_char_p path_name)
-
+    void obi_close_atexit()
+    
     obiversion_t obi_import_column(const char* dms_path_1, const char* dms_path_2, const char* column_name, obiversion_t version_number)
     int obi_import_view(const char* dms_path_1, const char* dms_path_2, const char* view_name_1, const char* view_name_2)

python/obitools3/dms/dms.pyx

@@ -1,14 +1,15 @@
 #cython: language_level=3
 
 
-from libc.stdlib  cimport free
+from libc.stdlib  cimport free, atexit
 from cpython.list cimport PyList_Size
 
 from .capi.obidms cimport obi_open_dms, \
                           obi_create_dms, \
                           obi_close_dms, \
                           obi_dms_exists, \
-                          obi_dms_get_full_path
+                          obi_dms_get_full_path, \
+                          obi_close_atexit
                                                       
 from .capi.obitypes cimport const_char_p
                             
@@ -30,6 +31,10 @@ cdef class DMS(OBIWrapper):
     cdef inline OBIDMS_p pointer(self):
         return <OBIDMS_p>(self._pointer)
     
+    @staticmethod
+    def obi_atexit():
+        atexit(obi_close_atexit)
+    
     @staticmethod
     def open_or_new(object dms_name) :
         cdef OBIDMS_p pointer