From: Wolfgang Bangerth <bangerth@math.tamu.edu>
Date: Tue, 7 Mar 2006 05:41:07 +0000 (+0000)
Subject: Work around a possible problem with the ordering of constructor calls to
X-Git-Tag: v8.0.0~12143
X-Git-Url: https://gitweb.dealii.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=c921c91a07574704c2c3dffa65ad1ac5e1ea6856;p=dealii.git

Work around a possible problem with the ordering of constructor calls to
::StaticMappingQ1 and hp::StaticMappingQ1.


git-svn-id: https://svn.dealii.org/trunk@12546 0785d39b-7218-0410-832d-ea1e28bc413d
---

diff --git a/deal.II/deal.II/include/fe/mapping_collection.h b/deal.II/deal.II/include/fe/mapping_collection.h
index 2a3da26b74..e1bc9eda17 100644
--- a/deal.II/deal.II/include/fe/mapping_collection.h
+++ b/deal.II/deal.II/include/fe/mapping_collection.h
@@ -134,12 +134,32 @@ namespace hp
 /**
  * In order to avoid creation of static MappingQ1 objects at several
  * places in the library (in particular in backward compatibility
- * functions), we define a static MappingQ1 objects once and for all
- * places where it is needed.
+ * functions), we define a static collection of mappings with a single
+ * MappingQ1 mapping object once and for all places where it is
+ * needed.
  */
   template <int dim>
   struct StaticMappingQ1
   {
+    private:
+                                       /**
+                                        * A static MappingQ1
+                                        * object. We can't use the one
+                                        * in ::StaticMappingQ1 since
+                                        * we can't make sure that the
+                                        * constructor for that object
+                                        * is run before the
+                                        * constructor for the present
+                                        * static object.
+                                        */
+      static MappingQ1<dim> mapping_q1;
+      
+    public:
+                                       /**
+                                        * The publicly available
+                                        * static Q1 mapping collection
+                                        * object.
+                                        */
       static MappingCollection<dim> mapping_collection;
   };
 
diff --git a/deal.II/deal.II/source/fe/mapping_collection.cc b/deal.II/deal.II/source/fe/mapping_collection.cc
index f001b536dd..8f0a99dc27 100644
--- a/deal.II/deal.II/source/fe/mapping_collection.cc
+++ b/deal.II/deal.II/source/fe/mapping_collection.cc
@@ -76,10 +76,16 @@ namespace hp
 //---------------------------------------------------------------------------
 
 
+
+  template <int dim>
+  MappingQ1<dim>
+  StaticMappingQ1<dim>::mapping_q1;
+  
+
   template <int dim>
   MappingCollection<dim>
   StaticMappingQ1<dim>::mapping_collection
-  = MappingCollection<dim>(::StaticMappingQ1<dim>::mapping);
+  = MappingCollection<dim>(mapping_q1);
 
 // explicit instantiations
   template class MappingCollection<deal_II_dimension>;