1 files changed, 139 insertions, 0 deletions
diff --git a/libcult/cult/mm/shptr.hxx b/libcult/cult/mm/shptr.hxx
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+++ b/libcult/cult/mm/shptr.hxx
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+// file      : cult/mm/Shptr.hxx
+// author    : Boris Kolpackov <boris@kolpackov.net>
+// copyright : Copyright (c) 2005-2010 Boris Kolpackov
+// license   : GNU GPL v2 + exceptions; see accompanying LICENSE file
+
+#ifndef CULT_MM_SHPTR_HXX
+#define CULT_MM_SHPTR_HXX
+
+#include <cult/types/fundamental.hxx>
+
+#include <cult/mm/exception.hxx>
+#include <cult/mm/bits/shptr.hxx>
+
+namespace Cult
+{
+  namespace MM
+  {
+    // Leaks resource should dec_ref fail.
+    //
+    template <typename X>
+    class Shptr : public Bits::Shptr<X>
+    {
+      typedef Bits::Shptr<X> Base;
+
+    public:
+      Shptr (X* p = 0)
+          : Base (p, locate (p, *counted), false)
+      {
+      }
+
+      Shptr (Shptr const& ap)
+          : Base (ap.p_, ap.c_)
+      {
+      }
+
+      template <typename Y>
+      Shptr (Shptr<Y> const& ap)
+          : Base (ap.p_, ap.c_)
+      {
+      }
+
+    public:
+      // After failure leaves object in destructable state.
+      //
+      Shptr&
+      operator= (Shptr const& ap)
+      {
+        this->assign (ap);
+        return *this;
+      }
+
+      template <typename Y>
+      Shptr&
+      operator= (Shptr<Y> const& ap)
+      {
+        this->assign (ap);
+        return *this;
+      }
+
+    public:
+      X*
+      operator-> () const
+      {
+        if (p_ == 0)
+          throw NullPointer ();
+
+        return p_;
+      }
+
+      X&
+      operator* () const
+      {
+        if (p_ == 0)
+          throw NullPointer ();
+
+        return *p_;
+      }
+
+      // conversion to bool
+      //
+      typedef X* (Shptr::*BooleanConvertible)() const;
+
+      operator BooleanConvertible () const throw ()
+      {
+        return p_ ? &Shptr<X>::operator-> : 0;
+      }
+
+    public:
+      X*
+      get () const throw ()
+      {
+        return p_;
+      }
+
+      X*
+      release () throw ()
+      {
+        return release_ ();
+      }
+
+      Size
+      count () const
+      {
+        if (p_ == 0)
+          throw NullPointer ();
+
+        return c_->count ();
+      }
+
+    public:
+      template<typename Y>
+      Shptr<Y>
+      d_cast () const
+      {
+        Y* p (dynamic_cast<Y*> (p_));
+        return Shptr<Y> (p, p ? c_ : 0);
+      }
+
+    private:
+      Shptr (X* p, Counter* c)
+          : Base (p, c)
+      {
+      }
+
+      template <typename>
+      friend class Shptr;
+
+    protected:
+      using Base::release_;
+
+      using Base::p_;
+      using Base::c_;
+    };
+  }
+
+  using MM::Shptr;
+}
+
+#endif  // CULT_MM_SHPTR_HXX