slic/include

diff -N Singleton.hh
--- /dev/null	1 Jan 1970 00:00:00 -0000
+++ Singleton.hh	5 Sep 2006 23:21:11 -0000	1.1
@@ -0,0 +1,52 @@

+// $Id: Singleton.hh,v 1.1 2006/09/05 23:21:11 jeremy Exp $
+
+#ifndef SLIC_SINGLETON_HH
+#define SLIC_SINGLETON_HH 1
+
+namespace slic
+{
+
+  template<class T>
+  class Singleton
+  {
+  public:
+    static T* instance();
+    void release();
+
+    Singleton();
+    ~Singleton();
+
+  private:
+    static T* m_singleton;
+  };
+
+  template<class T> T* Singleton<T>::m_singleton = 0;
+
+  template<class T>
+  Singleton<T>::Singleton()
+  {}
+
+  template<class T>
+  Singleton<T>::~Singleton()
+  {}
+
+  template<class T>
+  T* Singleton<T>::instance()
+  {
+    if (m_singleton == 0) {
+      m_singleton = new T;
+    }
+    return m_singleton;
+  }
+
+  template<class T>
+  void Singleton<T>::release ()
+  {
+    if (m_singleton == 0)
+      return;
+    delete m_singleton;
+    m_singleton = 0;
+  }
+}
+
+#endif