Imported existing code

libraries/include/boost/signals2/detail/stack_vector.hpp

@@ -0,0 +1,48 @@
+/*
+  A non-copyable vector which first allocates from the stack, before falling
+  back on usual std::allocator behavior.
+
+*/
+// Copyright Frank Mori Hess 2008.
+// Distributed under the Boost Software License, Version
+// 1.0. (See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt)
+
+// See http://www.boost.org/libs/signals2 for library home page.
+
+#ifndef BOOST_SIGNALS2_STACK_VECTOR_HPP
+#define BOOST_SIGNALS2_STACK_VECTOR_HPP
+
+#include <boost/noncopyable.hpp>
+#include <boost/signals2/detail/stack_allocator.hpp>
+#include <vector>
+
+namespace boost
+{
+  namespace signals2
+  {
+    namespace detail
+    {
+      template<typename T, std::size_t NumStackElements>
+        class stack_vector:
+        public std::vector<T, stack_allocator<T, NumStackElements> >,
+        public boost::noncopyable
+      {
+        typedef std::vector<T, stack_allocator<T, NumStackElements> > base_vector_type;
+      public:
+        static const std::size_t num_stack_elements = NumStackElements;
+        stack_vector(): base_vector_type(stack_allocator<T, num_stack_elements>(&_storage))
+        {
+          base_vector_type::reserve(num_stack_elements);
+        }
+      private:
+        stack_storage<T, num_stack_elements> _storage;
+      };
+      template<typename T, std::size_t NumStackElements>
+        const std::size_t stack_vector<T, NumStackElements>::num_stack_elements;
+
+    } // namespace detail
+  } // namespace signals2
+} // namespace boost
+
+#endif  // BOOST_SIGNALS2_STACK_VECTOR_HPP