From 80274596dfb0daf3564581e9e855f3debf483b12 Mon Sep 17 00:00:00 2001
From: Mathias Froehlich <Mathias.Froehlich@web.de>
Date: Sat, 3 Mar 2012 14:10:37 +0100
Subject: [PATCH] Use simgear internal stuff for the singleton class.

This removes the other still present dependency on osg
in the future sgcore library.
It also remove the need for the NO_OPENSCENEGRAPH_INTERFACE
compile time definition.
---
 CMakeLists.txt                    |  1 -
 simgear/CMakeLists.txt            |  1 -
 simgear/simgear_config_cmake.h.in |  3 ---
 simgear/structure/Singleton.hxx   | 12 ++++--------
 4 files changed, 4 insertions(+), 13 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index f1e985ad..281b366f 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -115,7 +115,6 @@ find_package(Threads REQUIRED)
 
 if(SIMGEAR_HEADLESS)
     message(STATUS "headless mode")
-    set(NO_OPENSCENEGRAPH_INTERFACE 1)
 else()
     find_package(OpenGL REQUIRED)
     find_package(OpenAL REQUIRED)
diff --git a/simgear/CMakeLists.txt b/simgear/CMakeLists.txt
index 096a800c..3ad734fa 100644
--- a/simgear/CMakeLists.txt
+++ b/simgear/CMakeLists.txt
@@ -46,7 +46,6 @@ if(SIMGEAR_SHARED)
     get_property(publicHeaders GLOBAL PROPERTY PUBLIC_HEADERS)
 
     add_library(SimGearCore SHARED ${coreSources})
-    set_property(TARGET SimGearCore PROPERTY COMPILE_FLAGS "-DNO_OPENSCENEGRAPH_INTERFACE=1")
 
   # set_property(TARGET SimGearCore PROPERTY FRAMEWORK 1)
   #  message(STATUS "public header: ${publicHeaders}")
diff --git a/simgear/simgear_config_cmake.h.in b/simgear/simgear_config_cmake.h.in
index a1192283..563f9f73 100644
--- a/simgear/simgear_config_cmake.h.in
+++ b/simgear/simgear_config_cmake.h.in
@@ -17,6 +17,3 @@
 #cmakedefine HAVE_LIBSVN_CLIENT_1
 
 #cmakedefine GCC_ATOMIC_BUILTINS_FOUND
-
-// set if building headless (no OSG or OpenGL libs)
-#cmakedefine NO_OPENSCENEGRAPH_INTERFACE
diff --git a/simgear/structure/Singleton.hxx b/simgear/structure/Singleton.hxx
index 35c712a2..dda5f78c 100644
--- a/simgear/structure/Singleton.hxx
+++ b/simgear/structure/Singleton.hxx
@@ -3,10 +3,8 @@
 
 #include "singleton.hpp"
 
-#ifndef NO_OPENSCENEGRAPH_INTERFACE
-#include <osg/Referenced>
-#include <osg/ref_ptr>
-#endif
+#include "SGReferenced.hxx"
+#include "SGSharedPtr.hxx"
 
 namespace simgear
 {
@@ -29,7 +27,6 @@ public:
     }
 };
 
-#ifndef NO_OPENSCENEGRAPH_INTERFACE
 template <typename RefClass>
 class SingletonRefPtr
 {
@@ -45,11 +42,11 @@ public:
         return singleton.ptr.get();
     }
 private:
-    osg::ref_ptr<RefClass> ptr;
+    SGSharedPtr<RefClass> ptr;
 };
 
 template <typename RefClass>
-class ReferencedSingleton : public virtual osg::Referenced
+class ReferencedSingleton : public virtual SGReferenced
 {
 public:
     static RefClass* instance()
@@ -57,7 +54,6 @@ public:
         return SingletonRefPtr<RefClass>::instance();
     }
 };
-#endif // of NO_OPENSCENEGRAPH_INTERFACE
 
 }
 #endif