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diff --git a/ringbuffer.h b/ringbuffer.h
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+///
+///	@file ringbuffer.h	@brief Ringbuffer module header file
+///
+///	Copyright (c) 2009, 2011 by Johns.  All Rights Reserved.
+///
+///	Contributor(s):
+///
+///	License: AGPLv3
+///
+///	This program is free software: you can redistribute it and/or modify
+///	it under the terms of the GNU Affero General Public License as
+///	published by the Free Software Foundation, either version 3 of the
+///	License.
+///
+///	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 Affero General Public License for more details.
+///
+///	$Id$
+//////////////////////////////////////////////////////////////////////////////
+
+/// @addtogroup Ringbuffer
+/// @{
+
+    ///< ring buffer typedef
+typedef struct _ring_buffer_ RingBuffer;
+
+    ///< create new ring buffer
+extern RingBuffer *RingBufferNew(size_t);
+
+    ///< free ring buffer
+extern void RingBufferDel(RingBuffer *);
+
+    /// write into ring buffer
+extern size_t RingBufferWrite(RingBuffer *, const void *, size_t);
+
+    /// get write pointer of ring buffer
+extern size_t RingBufferGetWritePointer(RingBuffer *, void **);
+
+    /// advance write pointer of ring buffer
+extern size_t RingBufferWriteAdvance(RingBuffer *, size_t);
+
+    /// read from ring buffer
+extern size_t RingBufferRead(RingBuffer *, void *, size_t);
+
+    /// get read pointer of ring buffer
+extern size_t RingBufferGetReadPointer(RingBuffer *, const void **);
+
+    /// advance read pointer of ring buffer
+extern size_t RingBufferReadAdvance(RingBuffer *, size_t);
+
+    /// free bytes ring buffer
+extern size_t RingBufferFreeBytes(RingBuffer *);
+
+    /// used bytes ring buffer
+extern size_t RingBufferUsedBytes(RingBuffer *);
+
+/// @}