Merge commit 'a2059eea4ad3021eb6a90959eea1edddc57e249d' as 'external/parallel-rdp/parallel-rdp-standalone'

external/parallel-rdp/parallel-rdp-standalone/util/dynamic_array.hpp

@@ -0,0 +1,59 @@
+/* Copyright (c) 2017-2023 Hans-Kristian Arntzen
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+ * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+ * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+ * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+ * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+#pragma once
+
+#include "aligned_alloc.hpp"
+#include <memory>
+#include <algorithm>
+#include <type_traits>
+
+namespace Util
+{
+template <typename T>
+class DynamicArray
+{
+public:
+	// Only POD-like types work here since we don't invoke placement new or delete.
+	static_assert(std::is_trivially_default_constructible<T>::value, "T must be trivially constructible.");
+	static_assert(std::is_trivially_destructible<T>::value, "T must be trivially destructible.");
+
+	inline void reserve(size_t n)
+	{
+		if (n > N)
+		{
+			buffer.reset(static_cast<T *>(memalign_alloc(std::max<size_t>(64, alignof(T)), n * sizeof(T))));
+			N = n;
+		}
+	}
+
+	inline T &operator[](size_t index) { return buffer.get()[index]; }
+	inline const T &operator[](size_t index) const { return buffer.get()[index]; }
+	inline T *data() { return buffer.get(); }
+	inline const T *data() const { return buffer.get(); }
+	inline size_t get_capacity() const { return N; }
+
+private:
+	std::unique_ptr<T, AlignedDeleter> buffer;
+	size_t N = 0;
+};
+}