* Synchronize asset storage operations to mysql as well as reads

* This may help with asset server mysql problems, since both the previous osgrid failures occurred when both a read and write were attempted in the same second

OpenSim/Framework/Data.MySQL/MySQLAssetData.cs

@@ -76,6 +76,7 @@ namespace OpenSim.Framework.Data.MySQL
                         _dbConnection.Connection);
                 MySqlParameter p = cmd.Parameters.Add("?id", MySqlDbType.Binary, 16);
                 p.Value = assetID.GetBytes();
+                
                 try
                 {
                     using (MySqlDataReader dbReader = cmd.ExecuteReader(CommandBehavior.SingleRow))
@@ -107,6 +108,8 @@ namespace OpenSim.Framework.Data.MySQL
         }
 
         public void CreateAsset(AssetBase asset)
+        {            
+            lock (_dbConnection)
             {
                 MySqlCommand cmd =
                     new MySqlCommand(
@@ -141,6 +144,7 @@ namespace OpenSim.Framework.Data.MySQL
                     _dbConnection.Reconnect();
                 }   
             }
+        }
 
         public void UpdateAsset(AssetBase asset)
         {