Preparation for C--, removed classes, namespaces, advanced build options are now controlled via include/libztDefs.h

include/RingBuffer.h

@@ -0,0 +1,94 @@
+/*
+ * ZeroTier SDK - Network Virtualization Everywhere
+ * Copyright (C) 2011-2017  ZeroTier, Inc.  https://www.zerotier.com/
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ * --
+ *
+ * You can be released from the requirements of the license by purchasing
+ * a commercial license. Buying such a license is mandatory as soon as you
+ * develop commercial closed-source software that incorporates or links
+ * directly against ZeroTier software without disclosing the source code
+ * of your own application.
+ */
+
+/**
+ * @file
+ *
+ * Ring buffer implementation for network stack drivers
+ */
+
+#ifndef ZT_RINGBUFFER_H
+#define ZT_RINGBUFFER_H
+
+typedef char bufElementType;
+
+class RingBuffer
+{
+private:
+	bufElementType * buf;
+	size_t size;
+	size_t begin;
+	size_t end;
+	bool wrap;
+
+public:
+	/**
+	* create a RingBuffer with space for up to size elements.
+	*/
+	explicit RingBuffer(size_t size)
+		: size(size),
+		begin(0),
+		end(0),
+		wrap(false)
+	{
+		buf = new bufElementType[size];
+	}
+/*
+	RingBuffer(const RingBuffer<T> & ring)
+	{
+		this(ring.size);
+		begin = ring.begin;
+		end = ring.end;
+		memcpy(buf, ring.buf, sizeof(T) * size);
+	}
+*/
+	~RingBuffer()
+	{
+		delete[] buf;
+	}
+
+	// get a reference to the underlying buffer
+	bufElementType* get_buf();
+
+	// adjust buffer index pointer as if we copied data in
+	size_t produce(size_t n);
+
+	// merely reset the buffer pointer, doesn't erase contents
+	void reset();
+
+	// adjust buffer index pointer as if we copied data out
+	size_t consume(size_t n);
+
+	size_t write(const bufElementType * data, size_t n);
+
+	size_t read(bufElementType * dest, size_t n);
+
+	size_t count();
+
+	size_t getFree();
+};
+
+#endif // _H