From 6b1eb715eeab2d2f8cf7efdd08d3124a7dc8443d Mon Sep 17 00:00:00 2001
From: Denis Koronchik <denis@mapswithme.com>
Date: Tue, 30 Sep 2014 12:19:03 +0300
Subject: [PATCH] [routing] Efficient usage of virtual memory

---
 routing/osrm_router.cpp | 27 ++++++++++++++++++++++++++-
 1 file changed, 26 insertions(+), 1 deletion(-)

diff --git a/routing/osrm_router.cpp b/routing/osrm_router.cpp
index 8a3b140cd6..7950756502 100644
--- a/routing/osrm_router.cpp
+++ b/routing/osrm_router.cpp
@@ -185,7 +185,6 @@ void OsrmRouter::CalculateRoute(m2::PointD const & startingPt, ReadyCallback con
 
       m_container.Open(fPath);
 
-      m_dataFacade.Load(m_container);
       m_mapping.Load(m_container);
     }
     catch (Reader::Exception const & e)
@@ -226,10 +225,25 @@ void OsrmRouter::CalculateRoute(m2::PointD const & startingPt, ReadyCallback con
     return;
   }
 
+  try
+  {
+    m_mapping.Clear();
+    m_dataFacade.Load(m_container);
+  }
+  catch(Reader::Exception const & e)
+  {
+    LOG(LERROR, ("Error while loading routing data:", fPath, e.Msg()));
+    resGuard.SetErrorMsg("Routing data absent or incorrect.");
+    return;
+  }
+
   rawRoute.segment_end_coordinates.push_back(nodes);
 
   pathFinder({nodes}, {}, rawRoute);
 
+  // unmap routing data
+  m_dataFacade.Clear();
+
   if (INVALID_EDGE_WEIGHT == rawRoute.shortest_path_length
       || rawRoute.segment_end_coordinates.empty()
       || rawRoute.source_traversed_in_reverse.empty())
@@ -238,6 +252,17 @@ void OsrmRouter::CalculateRoute(m2::PointD const & startingPt, ReadyCallback con
     return;
   }
 
+  try
+  {
+    m_mapping.Load(m_container);
+  }
+  catch(Reader::Exception const & e)
+  {
+    LOG(LERROR, ("Error while loading routing index:", fPath, e.Msg()));
+    resGuard.SetErrorMsg("Routing index absent or incorrect.");
+    return;
+  }
+
   // restore route
   vector<m2::PointD> points;
   for (auto i : osrm::irange<std::size_t>(0, rawRoute.unpacked_path_segments.size()))