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+/*************************************************************************
+ * Copyright (C) 2008 Tavian Barnes <tavianator@gmail.com> *
+ * *
+ * This file is part of The Dimension Library. *
+ * *
+ * The Dimension Library is free software; you can redistribute it and/ *
+ * or modify it under the terms of the GNU Lesser General Public License *
+ * as published by the Free Software Foundation; either version 3 of the *
+ * License, or (at your option) any later version. *
+ * *
+ * The Dimension Library is distributed in the hope that it will be *
+ * useful, but WITHOUT ANY WARRANTY; without even the implied warranty *
+ * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU *
+ * Lesser General Public License for more details. *
+ * *
+ * You should have received a copy of the GNU Lesser General Public *
+ * License along with this program. If not, see *
+ * <http://www.gnu.org/licenses/>. *
+ *************************************************************************/
+
+#ifndef DIMENSIONXX_ARRAY_HPP
+#define DIMENSIONXX_ARRAY_HPP
+
+#include <tr1/memory>
+
+// dmnsn_array* wrapper.
+
+namespace Dimension
+{
+ // Array template class, wraps a dmnsn_array*. Copying is possible, but
+ // copies refer to the same object, which is reference counted. T must be
+ // a POD type.
+ template <typename T>
+ class Array
+ {
+ public:
+ Array();
+ explicit Array(dmnsn_array* array);
+ // Array(const Array& a);
+ ~Array();
+
+ // Array& operator=(const Array& a);
+
+ // Access the wrapped C object.
+ dmnsn_array* dmnsn() { return *m_array; }
+ const dmnsn_array* dmnsn() const { return *m_array; }
+
+ // Release ownership of the dmnsn_array*, needed for returning a
+ // dmnsn_array* from a function.
+ dmnsn_array* release();
+
+ private:
+ std::tr1::shared_ptr<dmnsn_array*> m_array;
+ };
+
+ // A constraint enforcing that T is a POD type by making it part of a union.
+ // Taking the address of this function will cause a compile-time failure if
+ // T is not a POD type.
+ template <typename T>
+ void
+ POD_constraint()
+ {
+ union
+ {
+ T t;
+ } constraint;
+ static_cast<void>(constraint); // Silence unused variable warning
+ }
+
+ template <typename T>
+ Array<T>::Array()
+ : m_array(new dmnsn_array*(dmnsn_new_array(sizeof(T))))
+ {
+ void (*constraint)() = &POD_constraint<T>;
+ static_cast<void>(constraint); // Silence unused variable warning
+ }
+
+ template <typename T>
+ Array<T>::Array(dmnsn_array* array)
+ : m_array(new dmnsn_array*(array))
+ {
+ void (*constraint)() = &POD_constraint<T>;
+ static_cast<void>(constraint); // Silence unused variable warning
+ }
+
+ template <typename T>
+ Array<T>::~Array()
+ {
+ if (m_array.unique()) {
+ dmnsn_delete_array(*m_array);
+ }
+ }
+
+ template <typename T>
+ dmnsn_array*
+ Array<T>::release()
+ {
+ if (!m_array.unique()) {
+ throw Dimension_Error("Attempting to release non-unique array.");
+ }
+
+ dmnsn_array* array = *m_array;
+ m_array.reset();
+ return array;
+ }
+}
+
+#endif /* DIMENSIONXX_ARRAY_HPP */