init ringbuffer count to 0

[enigma2.git] / lib / base / smartptr.h

diff --git a/lib/base/smartptr.h b/lib/base/smartptr.h
index 159eeb2c0122ff43fa16786fb7dd787c20eaeb62..7e441ab2976ab67e48e67b89064a72c22fe9ec7f 100644 (file)
--- a/lib/base/smartptr.h
+++ b/lib/base/smartptr.h
@@ -66,6 +66,81 @@ public:
 };
 
 
+template<class T>
+class eUsePtr
+{
+protected:
+       T *ptr;
+public:
+       T &operator*() { return *ptr; }
+       eUsePtr(): ptr(0)
+       {
+       }
+       eUsePtr(T *c): ptr(c)
+       {
+               if (c)
+               {
+                       c->AddRef();
+                       c->AddUse();
+               }
+       }
+       eUsePtr(const eUsePtr &c)
+       {
+               ptr=c.ptr;
+               if (ptr)
+               {
+                       ptr->AddRef();
+                       ptr->AddUse();
+               }
+       }
+       eUsePtr &operator=(T *c)
+       {
+               if (c)
+               {
+                       c->AddRef();
+                       c->AddUse();
+               }
+               if (ptr)
+               {
+                       ptr->ReleaseUse();
+                       ptr->Release();
+               }
+               ptr=c;
+               return *this;
+       }
+       
+       eUsePtr &operator=(eUsePtr<T> &c)
+       {
+               if (c.ptr)
+               {
+                       c.ptr->AddRef();
+                       c.ptr->AddUse();
+               }
+               if (ptr)
+               {
+                       ptr->ReleaseUse();
+                       ptr->Release();
+               }
+               ptr=c.ptr;
+               return *this;
+       }
+       
+       ~eUsePtr()
+       {
+               if (ptr)
+               {
+                       ptr->ReleaseUse();
+                       ptr->Release();
+               }
+       }
+       
+       T* grabRef() { if (!ptr) return 0; ptr->AddRef(); ptr->AddUse(); return ptr; }
+       T* &ptrref() { assert(!ptr); return ptr; }
+       T* operator->() const { assert(ptr); return ptr; }
+       operator T*() const { return this->ptr; }
+};
+
+
 
 #ifndef SWIG
 template<class T>