added partial VFS support - enough to read static data from any source

ExternalLibs/ttvfs/VFSSelfRefCounter.h

@@ -0,0 +1,44 @@
+#ifndef SELFREFCOUNTER_H
+#define SELFREFCOUNTER_H
+
+#include "VFSDefines.h"
+#include "VFSAtomic.h"
+
+VFS_NAMESPACE_START
+
+// self must point to the object that holds the counter.
+template <class T, bool DELSELF = true> class SelfRefCounter
+{
+private:
+    T *self;
+    volatile int c;
+    SelfRefCounter(SelfRefCounter& r); // forbid copy constructor
+    inline unsigned int _deref(void)
+    {
+        unsigned int cc = (unsigned int)Atomic_Decr(c); // copy c, in case we get deleted
+        if(DELSELF && !cc)
+        {
+            delete self;
+        }
+
+        return cc;
+    }
+
+public:
+    SelfRefCounter(T *p): self(p), c(1) {}
+    ~SelfRefCounter() { /* DEBUG(ASSERT(c <= 1)); */ } // its ok if the last reference calls delete instead of _deref()
+    inline unsigned int count(void) { return c; }
+
+    // post-increment (dummy int)
+    inline unsigned int operator++(int) { unsigned int cc = c; Atomic_Incr(c); return cc; }
+    inline unsigned int operator--(int) { unsigned int cc = c; _deref(); return cc; }
+
+    // pre-increment
+    inline unsigned int operator++(void) { return (unsigned int)Atomic_Incr(c); }
+    inline unsigned int operator--(void) { return _deref(); }
+};
+
+VFS_NAMESPACE_END
+
+
+#endif