diff options
Diffstat (limited to 'includes/Handle.h')
| -rw-r--r-- | includes/Handle.h | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/includes/Handle.h b/includes/Handle.h index 96f1736..321d8db 100644 --- a/includes/Handle.h +++ b/includes/Handle.h @@ -63,7 +63,7 @@ class IOBase { IOBase() : m_h(NULL) { } ~IOBase() { if (m_h) m_h->delRef(); } protected: - void setHandle(Handle * h) { m_h = h; m_h->addRef(); } + void setHandle(Handle * h) { m_h = h; if (m_h) m_h->addRef(); } Handle * m_h; template<class T> friend class IO; @@ -74,11 +74,12 @@ class IO : public IOBase { public: IO() { } IO(T * h) { setHandle(h); } - IO(const IO<T> & io) { setHandle(io.m_h); } + IO(const IO<T> & io) { if (io.m_h) setHandle(io.m_h); } template<class U> - IO(const IO<U> & io) { setHandle(io.m_h); } + IO(const IO<U> & io) { if (io.m_h) setHandle(io.m_h); } IO<T> & operator=(const IO<T> & io) { if (m_h) m_h->delRef(); setHandle(io.m_h); return *this; } T * operator->() { Assert(m_h); return dynamic_cast<T *>(m_h); } + bool isNull() { return dynamic_cast<T *>(m_h); } }; class SeekableHandle : public Handle { |