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3party/kdtree++/allocator.hpp

@@ -0,0 +1,96 @@
+/** \file
+ * Defines the allocator interface as used by the KDTree class.
+ *
+ * \author Martin F. Krafft <libkdtree@pobox.madduck.net>
+ */
+
+#ifndef INCLUDE_KDTREE_ALLOCATOR_HPP
+#define INCLUDE_KDTREE_ALLOCATOR_HPP
+
+#include <cstddef>
+
+#include "node.hpp"
+
+namespace KDTree
+{
+
+  template <typename _Tp, typename _Alloc>
+    class _Alloc_base
+    {
+    public:
+      typedef _Node<_Tp> _Node_;
+      typedef typename _Node_::_Base_ptr _Base_ptr;
+      typedef _Alloc allocator_type;
+
+      _Alloc_base(allocator_type const& __A)
+        : _M_node_allocator(__A) {}
+
+      allocator_type
+      get_allocator() const
+      {
+        return _M_node_allocator;
+      }
+
+
+      class NoLeakAlloc
+      {
+         _Alloc_base * base;
+         _Node_ * new_node;
+
+      public:
+         NoLeakAlloc(_Alloc_base * b) : base(b), new_node(base->_M_allocate_node()) {}
+
+         _Node_ * get() { return new_node; }
+         void disconnect() { new_node = NULL; }
+
+         ~NoLeakAlloc() { if (new_node) base->_M_deallocate_node(new_node); }
+      };
+
+
+    protected:
+      allocator_type _M_node_allocator;
+      
+      _Node_*
+      _M_allocate_node()
+      {
+        return _M_node_allocator.allocate(1);
+      }
+
+      void
+      _M_deallocate_node(_Node_* const __P)
+      {
+        return _M_node_allocator.deallocate(__P, 1);
+      }
+
+      void
+      _M_construct_node(_Node_* __p, _Tp const __V = _Tp(),
+                        _Base_ptr const __PARENT = NULL,
+                        _Base_ptr const __LEFT = NULL,
+                        _Base_ptr const __RIGHT = NULL)
+      {
+        new (__p) _Node_(__V, __PARENT, __LEFT, __RIGHT);
+      }
+
+      void
+      _M_destroy_node(_Node_* __p)
+      {
+        __p->~_Node_();
+      }
+    };
+
+} // namespace KDTree
+
+#endif // include guard
+
+/* COPYRIGHT --
+ *
+ * This file is part of libkdtree++, a C++ template KD-Tree sorting container.
+ * libkdtree++ is (c) 2004-2007 Martin F. Krafft <libkdtree@pobox.madduck.net>
+ * and Sylvain Bougerel <sylvain.bougerel.devel@gmail.com> distributed under the
+ * terms of the Artistic License 2.0. See the ./COPYING file in the source tree
+ * root for more information.
+ *
+ * THIS PACKAGE IS PROVIDED "AS IS" AND WITHOUT ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES
+ * OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
+ */