From 6f0d40508286afc8cdd72a0b5f807d5c2a589cfc Mon Sep 17 00:00:00 2001
From: Boris Kolpackov <boris@codesynthesis.com>
Date: Fri, 4 Jun 2010 16:33:08 +0200
Subject: Initial implementation

---
 odb/shared-ptr/base.hxx | 91 +++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 91 insertions(+)
 create mode 100644 odb/shared-ptr/base.hxx

(limited to 'odb/shared-ptr/base.hxx')

diff --git a/odb/shared-ptr/base.hxx b/odb/shared-ptr/base.hxx
new file mode 100644
index 0000000..8c1b62b
--- /dev/null
+++ b/odb/shared-ptr/base.hxx
@@ -0,0 +1,91 @@
+// file      : odb/shared-ptr/base.hxx
+// author    : Boris Kolpackov <boris@codesynthesis.com>
+// copyright : Copyright (c) 2009-2010 Code Synthesis Tools CC
+// license   : GNU GPL v2; see accompanying LICENSE file
+
+#ifndef ODB_SHARED_PTR_BASE_HXX
+#define ODB_SHARED_PTR_BASE_HXX
+
+#include <new>
+#include <cstddef>   // std::size_t
+
+#include <odb/exception.hxx>
+
+namespace odb
+{
+  struct share
+  {
+    explicit
+    share (char id);
+
+    bool
+    operator== (share) const;
+
+  private:
+    char id_;
+  };
+}
+
+extern odb::share shared;
+extern odb::share exclusive;
+
+void*
+operator new (std::size_t, odb::share) throw (std::bad_alloc);
+
+void
+operator delete (void*, odb::share) throw ();
+
+namespace odb
+{
+  struct not_shared: exception
+  {
+    virtual char const*
+    what () const throw ();
+  };
+
+  struct shared_base
+  {
+    shared_base ();
+    shared_base (shared_base const&);
+    shared_base&
+    operator= (shared_base const&);
+
+    void
+    _inc_ref ();
+
+    bool
+    _dec_ref ();
+
+    std::size_t
+    _ref_count () const;
+
+    void*
+    operator new (std::size_t, share) throw (std::bad_alloc);
+
+    void
+    operator delete (void*, share) throw ();
+
+    void
+    operator delete (void*) throw ();
+
+  protected:
+    std::size_t counter_;
+  };
+
+  template <typename X>
+  inline X*
+  inc_ref (X*);
+
+  template <typename X>
+  inline void
+  dec_ref (X*);
+
+  template <typename X>
+  inline std::size_t
+  ref_count (X const*);
+}
+
+#include <odb/shared-ptr/base.ixx>
+#include <odb/shared-ptr/base.txx>
+
+#endif // ODB_SHARED_PTR_BASE_HXX
-- 
cgit v1.1