ENH: Allow Athenticator to be managed by Julia or C

src/CaosDB.jl

@@ -81,13 +81,13 @@ authenticator object from a configuration.
 mutable struct _Authenticator
     wrapped_authenticator::Ptr{Cvoid}
 
-    function _Authenticator()
+    function _Authenticator(managed_by_julia::Bool=false)
         auth = new()
-        # force this to point to C_NULL after initialization
-        auth.wrapped_authenticator = C_NULL
+        if managed_by_julia
+            # Only append a finalizer for this if the object is
+            # actually managed by Julia and not created and destroyed
+            # internally by libcaosdb.
             function f(t)
-            if t.wrapped_authenticator != C_NULL
-                # Only if pointer was filled after real initialization
                 ccall(
                     (:caosdb_authentication_delete_authenticator, "libccaosdb"),
                     Cint,
@@ -95,9 +95,10 @@ mutable struct _Authenticator
                     Ref{_Authenticator}(t),
                 )
             end
-        end
             finalizer(f, auth)
         end
+        return auth
+    end
 end
 
 """
@@ -115,7 +116,7 @@ function create_plain_password_authenticator(
     password::AbstractString,
 )
 
-    auth = Ref{_Authenticator}(_Authenticator())
+    auth = Ref{_Authenticator}(_Authenticator(true))
 
     err_code = ccall(
         (:caosdb_authentication_create_plain_password_authenticator, "libccaosdb"),

src/Connection.jl

@@ -96,6 +96,9 @@ mutable struct _Configuration
     function _Configuration(managed_by_julia::Bool=false)
         config = new()
         if managed_by_julia
+            # Only append a finalizer for this if the object is
+            # actually managed by Julia and not created and destroyed
+            # internally by libcaosdb.
             function f(t)
                 ccall(
                     (:caosdb_connection_delete_connection_configuration, "libccaosdb"),
@@ -274,7 +277,7 @@ to.
 """
 function get_version_info(con::Ref{_Connection})
 
-    info = Ref{CaosDB.Info._VersionInfo}(CaosDB.Info._VersionInfo(true))
+    info = Ref{CaosDB.Info._VersionInfo}(CaosDB.Info._VersionInfo())
 
     err_code = ccall(
         (:caosdb_connection_get_version_info, "libccaosdb"),