From 01c70260177e586af94f9d221f9a5e616d8a504f Mon Sep 17 00:00:00 2001
From: suter <frederic.suter@cc.in2p3.fr>
Date: Mon, 17 Dec 2012 16:30:12 +0100
Subject: [PATCH] when the value of an event is a negative one, don't update
 resource state during presolve. Allows to use default status up to the time
 (>0) of the "real" first event.

---
 src/surf/surf.c | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/src/surf/surf.c b/src/surf/surf.c
index 22aeea5247..3cf22634da 100644
--- a/src/surf/surf.c
+++ b/src/surf/surf.c
@@ -518,9 +518,11 @@ void surf_presolve(void)
             tmgr_history_get_next_event_leq(history, next_event_date,
                                             &value,
                                             (void **) &resource))) {
-      resource->model->model_private->update_resource_state(resource,
-                                                            event, value,
-                                                            NOW);
+      if (value >= 0){
+        resource->model->model_private->update_resource_state(resource,
+                                                              event, value,
+                                                              NOW);
+      }
     }
   }
   xbt_dynar_foreach(model_list, iter, model)
-- 
2.20.1