1 files changed, 83 insertions, 0 deletions
diff --git a/libodb/odb/details/shared-ptr/base.cxx b/libodb/odb/details/shared-ptr/base.cxx
new file mode 100644
index 0000000..d937400
--- /dev/null
+++ b/libodb/odb/details/shared-ptr/base.cxx
@@ -0,0 +1,83 @@
+// file      : odb/details/shared-ptr/base.cxx
+// license   : GNU GPL v2; see accompanying LICENSE file
+
+#include <odb/details/shared-ptr/base.hxx>
+#include <odb/details/shared-ptr/exception.hxx>
+
+using std::size_t;
+
+namespace odb
+{
+  namespace details
+  {
+    share shared = share (1);
+    share exclusive = share (2);
+
+    const char* not_shared::
+    what () const ODB_NOTHROW_NOEXCEPT
+    {
+      return "object is not shared";
+    }
+
+    not_shared* not_shared::
+    clone () const
+    {
+      return new not_shared (*this);
+    }
+
+    namespace bits
+    {
+      size_t* locator_common::
+      counter (void* x)
+      {
+        size_t* p (static_cast<size_t*> (x));
+
+        if (*(--p) != 0xDEADBEEF)
+          throw not_shared ();
+
+        return --p;
+      }
+    }
+  }
+}
+
+void*
+#ifdef ODB_CXX11
+operator new (size_t n, odb::details::share s)
+#else
+operator new (size_t n, odb::details::share s) throw (std::bad_alloc)
+#endif
+{
+  if (s == odb::details::shared)
+  {
+    // Here we need to make sure we don't break the alignment of the
+    // returned block. For that we need to know the maximum alignment
+    // of this platform. Twice the pointer size is a good guess for
+    // most platforms.
+    //
+    size_t* p = static_cast<size_t*> (operator new (n + 2 * sizeof (size_t)));
+    *p++ = 1;          // Initial count.
+    *p++ = 0xDEADBEEF; // Signature.
+    return p;
+  }
+  else
+    return operator new (n);
+
+}
+
+void
+operator delete (void* p, odb::details::share s) ODB_NOTHROW_NOEXCEPT
+{
+  // This version of operator delete is only called when the c-tor
+  // fails. In this case there is no object and we can just free the
+  // memory.
+  //
+  if (s == odb::details::shared)
+  {
+    size_t* sp = static_cast<size_t*> (p);
+    sp -= 2;
+    operator delete (sp);
+  }
+  else
+    operator delete (p);
+}