Add BStackOrHeapArray.

headers/os/support/StackOrHeapArray.h

@@ -0,0 +1,42 @@
+/*
+ * Copyright 2012, Jonathan Schleifer <js@webkeks.org>. All Rights Reserved.
+ * Distributed under the terms of the MIT License.
+ */
+#ifndef	_SUPPORT_STACKORHEAPARRAY_H
+#define	_SUPPORT_STACKORHEAPARRAY_H
+
+#include <new>
+
+template <typename Type, int StackSize>
+class BStackOrHeapArray {
+public:
+	BStackOrHeapArray(size_t count)
+	{
+		if (count > StackSize)
+			fData = new(std::nothrow) Type[count];
+		else
+			fData = fStackData;
+	}
+
+	~BStackOrHeapArray()
+	{
+		if (fData != fStackData)
+			delete[] fData;
+	}
+
+	bool IsValid() const
+	{
+		return fData != NULL;
+	}
+
+	operator Type*()
+	{
+		return fData;
+	}
+
+private:
+	Type	fStackData[StackSize];
+	Type*	fData;
+};
+
+#endif