many C-string -> std::string replacements and some additional code taken from OpenLieroX

git-svn-id: https://clonekeenplus.svn.sourceforge.net/svnroot/clonekeenplus/cgenius/trunk@87 4df4b0f3-56ce-47cb-b001-ed939b7d65a6

src/RefCounter.h

@@ -0,0 +1,54 @@
+/*
+ *  RefCounter.h
+ *  OpenLieroX
+ *
+ *  Created by Albert Zeyer on 01.06.09.
+ *  code under LGPL
+ *
+ */
+
+#ifndef __OLX__REFCOUNTER_H__
+#define __OLX__REFCOUNTER_H__
+
+#include <cstring> // for size_t
+
+/*
+ * This class is to be added as an additional baseclass and overload the onLastRefRemoved method.
+ */
+
+class RefCounter {
+private:
+	size_t* m_refCount;
+
+	// asumes that already cleared
+	void copy(const RefCounter& r) {
+		m_refCount = r.m_refCount;
+		(*m_refCount)++;
+	}
+
+protected:
+	// call this manually if you aren't sure if your virtual function is already unset
+	void uninit() {
+		if(m_refCount) {
+			(*m_refCount)--;
+			size_t* ref = m_refCount;
+			m_refCount = NULL;			
+			if(*ref == 0) {
+				delete ref;
+				onLastRefRemoved();
+			}
+		}
+	}
+	
+public:	
+	RefCounter() : m_refCount(NULL) { m_refCount = new size_t(1); }
+	RefCounter(const RefCounter& r) : m_refCount(NULL) { copy(r); }
+	RefCounter& operator=(const RefCounter& r) { uninit(); copy(r); return *this; }
+	virtual ~RefCounter() { uninit(); }
+	size_t refCount() const { return *m_refCount; }
+	
+	virtual void onLastRefRemoved() = 0;
+};
+
+#endif
+