- do some basic locking (no reference counting so contexts can be

removed while still used)
- don't export gss_ctx_id_t_desc_struct and gss_cred_id_t_desc_struct
- make sure all lifetime are returned in seconds left until expired,
  not in unix epoch


git-svn-id: svn://svn.h5l.se/heimdal/trunk/heimdal@12317 ec53bebd-3082-4978-b11e-865c3cabbd6b

lib/gssapi/krb5/delete_sec_context.c

@@ -48,6 +48,8 @@ OM_uint32 gss_delete_sec_context
 	output_token->value  = NULL;
     }
 
+    HEIMDAL_MUTEX_lock(&(*context_handle)->ctx_id_mutex);
+
     krb5_auth_con_free (gssapi_krb5_context,
 			(*context_handle)->auth_context);
     if((*context_handle)->source)
@@ -62,6 +64,9 @@ OM_uint32 gss_delete_sec_context
 	free((*context_handle)->ticket);
     }
 
+    HEIMDAL_MUTEX_unlock(&(*context_handle)->ctx_id_mutex);
+    HEIMDAL_MUTEX_destroy(&(*context_handle)->ctx_id_mutex);
+    memset(*context_handle, 0, sizeof(**context_handle));
     free (*context_handle);
     *context_handle = GSS_C_NO_CONTEXT;
     *minor_status = 0;