- Separate template definition from template declaration

- Explicitly instantiate Singleton templates to be exported from libbackend.so
- Install only header files that are backend interfaces to be exposed to the user
- Don't use full path for including templates in header files
- Instantiate a couple of smart_ptr templates to have their symbols exported outside the DSO. This happens in history.cc. FIXME: the interface for History will definitely need to be reworked, and the two smart_ptr explicit instantiations removed.
- Change SWIG exported interface to make use of Schedulable instead of (Dynamic|Static)Schedulable
- Fix provided policies to make use of the new interface
- TODO: limit the use of smart_ptrs.


git-svn-id: svn://svn.gna.org/svn/sgpemv2/trunk@653 3ecf2c5c-341e-0410-92b4-d18e462d057c

src/backend/global_preferences.cc

@@ -21,9 +21,12 @@
 #include "config.h"
 #include "global_preferences.hh"
 
+// Do not include in header file:
+#include "singleton.tcc"
 using namespace sgpem;
 
-GlobalPreferences* GlobalPreferences::_instance = NULL;
+// Explicit template instantiation to allow to export symbols from the DSO.
+template class SG_DLLEXPORT Singleton<GlobalPreferences>;
 
 GlobalPreferences::GlobalPreferences()
     : _mod_dirs(1, PLUGDIR), _pol_dirs(1, POLDIR)
@@ -71,10 +74,3 @@ GlobalPreferences::add_policies_dir(const Glib::ustring& poldir)
     _pol_dirs.insert(_pol_dirs.begin(), poldir);
 }
 
-GlobalPreferences&
-GlobalPreferences::get_instance()
-{
-  if(_instance == NULL)
-    _instance = new GlobalPreferences();
-  return *_instance;
-}