Avoid segfault if an exception is thrown while loading

[r2c2.git] / source / libr2c2 / layout.cpp

diff --git a/source/libr2c2/layout.cpp b/source/libr2c2/layout.cpp
index 0901382b91d0f140bb8ddf39010bf41228b33bfb..af7304da6aeef557f3f4f8119d08cc4aaca1ace4 100644 (file)
--- a/source/libr2c2/layout.cpp
+++ b/source/libr2c2/layout.cpp
@@ -69,31 +69,69 @@ Driver &Layout::get_driver() const
 void Layout::add(Object &o)
 {
        if(objects.insert(o))
-               signal_object_added.emit(o);
+       {
+               try
+               {
+                       signal_object_added.emit(o);
+               }
+               catch(...)
+               {
+                       objects.erase(o);
+                       throw;
+               }
+       }
 }
 
 void Layout::add(Track &t)
 {
        if(objects.insert(t))
        {
-               // Blocks must be recreated first
-               create_blocks();
-               signal_object_added.emit(t);
+               try
+               {
+                       // Blocks must be recreated first
+                       create_blocks();
+                       signal_object_added.emit(t);
+               }
+               catch(...)
+               {
+                       objects.erase(t);
+                       create_blocks();
+                       throw;
+               }
        }
 }
 
 void Layout::add(TrackChain &g)
 {
        if(track_chains.insert(g))
-               signal_track_chain_added.emit(g);
+       {
+               try
+               {
+                       signal_track_chain_added.emit(g);
+               }
+               catch(...)
+               {
+                       track_chains.erase(g);
+                       throw;
+               }
+       }
 }
 
 void Layout::add(Block &b)
 {
        if(track_chains.insert(b))
        {
-               b.signal_reserved.connect(sigc::bind<0>(signal_block_reserved, sigc::ref(b)));
-               signal_track_chain_added.emit(b);
+               sigc::connection conn = b.signal_reserved.connect(sigc::bind<0>(signal_block_reserved, sigc::ref(b)));
+               try
+               {
+                       signal_track_chain_added.emit(b);
+               }
+               catch(...)
+               {
+                       track_chains.erase(b);
+                       conn.disconnect();
+                       throw;
+               }
        }
 }