Added a bunch of files synched with 0.8.42

include/osgDB/DynamicLibrary

@@ -0,0 +1,63 @@
+#ifndef OSG_DYNAMICLIBRARY
+#define OSG_DYNAMICLIBRARY 1
+
+#include <osg/Referenced>
+#include <osgDB/Export>
+
+#include <string>
+
+
+namespace osgDB {
+
+/** DynamicLibrary - encapsulates the loading and unloading of dynamic libraries,
+    typically used for loading ReaderWriter plug-ins.
+*/
+class OSGDB_EXPORT DynamicLibrary : public osg::Referenced
+{
+    public:
+
+        typedef void*   HANDLE;
+        typedef void*   PROC_ADDRESS;
+        
+        /** returns a pointer to a DynamicLibrary object on successfully
+          * opening of library returns NULL on failure.
+          */
+        static DynamicLibrary* loadLibrary(const std::string& libraryName);
+
+        /** return name of library stripped of path.*/
+        const std::string& getName() const     { return _name; }
+
+        /** return name of library including full path to it.*/
+        const std::string& getFullName() const { return _fullName; }
+
+        /** return handle to .dso/.dll dynamic library itself.*/
+        HANDLE             getHandle() const   { return _handle; }
+
+        /** return address of function located in library.*/
+        PROC_ADDRESS       getProcAddress(const std::string& procName);
+
+    protected:
+
+        /** disallow default constructor.*/
+        DynamicLibrary():osg::Referenced() {}
+        /** disallow copy constructor.*/
+        DynamicLibrary(const DynamicLibrary&):osg::Referenced() {}
+        /** disallow copy operator.*/
+        DynamicLibrary& operator == (const DynamicLibrary&) { return *this; }
+        
+        /** Disallow public construction so that users have to go
+          * through loadLibrary() above which returns NULL on 
+          * failure, a valid DynamicLibrary object on success.
+          */
+        DynamicLibrary(const std::string& name,HANDLE handle);
+        ~DynamicLibrary();
+
+        HANDLE          _handle;
+        std::string     _name;
+        std::string     _fullName;
+
+};
+
+};
+
+#endif // __DYNAMIC_LIBRARY_H