removed unused sources

Cleaning up artifacts from a merge gone wrong.  Also remove the
ringbuf library, which is not being used.

6 files changed, 0 insertions, 691 deletions

diff --git a/src/Makefile.am b/src/Makefile.am
index 8debfb6a7..6f11caaab 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -59,7 +59,6 @@ mpd_headers = \
 	playlist.h \
 	playlist_save.h \
 	replayGain.h \
-	ringbuf.h \
 	signal_check.h \
 	sig_handlers.h \
 	song.h \
@@ -138,7 +137,6 @@ mpd_SOURCES = \
 	playlist.c \
 	playlist_save.c \
 	replayGain.c \
-	ringbuf.c \
 	sig_handlers.c \
 	signal_check.c \
 	song.c \
diff --git a/src/metadataChunk.c b/src/metadataChunk.c
deleted file mode 100644
index e69de29bb..000000000
--- a/src/metadataChunk.c
+++ /dev/null
diff --git a/src/metadataChunk.h b/src/metadataChunk.h
deleted file mode 100644
index e69de29bb..000000000
--- a/src/metadataChunk.h
+++ /dev/null
diff --git a/src/metadata_pipe.c b/src/metadata_pipe.c
deleted file mode 100644
index 83c36ce1b..000000000
--- a/src/metadata_pipe.c
+++ /dev/null
@@ -1,151 +0,0 @@
-/* the Music Player Daemon (MPD)
- * Copyright (C) 2003-2007 by Warren Dukes (warren.dukes@gmail.com)
- * This project's homepage is: http://www.musicpd.org
- *
- * 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 2 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, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
- */
-
-#include "metadata_pipe.h"
-#include "ringbuf.h"
-#include "decode.h"
-#include "os_compat.h"
-#include "log.h"
-#include "outputBuffer.h"
-#include "gcc.h"
-
-static struct ringbuf *mp;
-
-/* Each one of these is a packet inside the metadata pipe */
-struct tag_container {
-	float metadata_time;
-	uint8_t seq; /* ob.seq_decoder at time of metadata_pipe_send() */
-	struct mpd_tag *tag; /* our payload */
-};
-
-/*
- * We have two readers even though ringbuf was designed for one (locklessly),
- * so we will use a lock to allow readers to safely read.  Writing is only
- * done from one thread, so it will never block or clobber.
- */
-static pthread_mutex_t read_lock = PTHREAD_MUTEX_INITIALIZER;
-static struct mpd_tag *current_tag; /* requires read_lock for both r/w access */
-
-static void metadata_pipe_finish(void)
-{
-	ringbuf_free(mp);
-	if (current_tag)
-		tag_free(current_tag);
-}
-
-void init_metadata_pipe(void)
-{
-	mp = ringbuf_create(sizeof(struct tag_container) * 16);
-	atexit(metadata_pipe_finish);
-}
-
-void metadata_pipe_send(struct mpd_tag *tag, float metadata_time)
-{
-	struct tag_container tc;
-	size_t written;
-
-	assert(pthread_equal(pthread_self(), dc.thread));
-
-	if (mpd_unlikely(ringbuf_write_space(mp)
-	                 < sizeof(struct tag_container))) {
-		DEBUG("metadata_pipe: insufficient buffer space, dropping\n");
-		tag_free(tag);
-		return;
-	}
-
-	tc.tag = tag;
-	tc.metadata_time = metadata_time;
-	tc.seq = ob_get_decoder_sequence();
-	written = ringbuf_write(mp, &tc, sizeof(struct tag_container));
-	assert(written == sizeof(struct tag_container));
-}
-
-struct mpd_tag * metadata_pipe_recv(void)
-{
-	struct tag_container tc;
-	size_t r;
-	static const size_t uint8_t_max = 255; /* XXX CLEANUP */
-	uint8_t expect_seq = ob_get_player_sequence();
-	unsigned long current_time = ob_get_elapsed_time();
-	struct mpd_tag *tag = NULL;
-
-	if (pthread_mutex_trylock(&read_lock) == EBUSY)
-		return NULL;
-retry:
-	if (!(r = ringbuf_peek(mp, &tc, sizeof(struct tag_container))))
-		goto out;
-
-	assert(r == sizeof(struct tag_container));
-	assert(tc.tag);
-	if (expect_seq == tc.seq) {
-		if (current_time < tc.metadata_time)
-			goto out; /* not ready for tag yet */
-		if (tag_equal(tc.tag, current_tag)) {
-			tag_free(tc.tag);
-			ringbuf_read_advance(mp, sizeof(struct tag_container));
-			goto out; /* nothing changed, don't bother */
-		}
-		tag = tag_dup(tc.tag);
-		if (current_tag)
-			tag_free(current_tag);
-		current_tag = tc.tag;
-		ringbuf_read_advance(mp, sizeof(struct tag_container));
-	} else if (expect_seq > tc.seq ||
-	           (!expect_seq && tc.seq == uint8_t_max)) {
-		DEBUG("metadata_pipe: reader is ahead of writer\n");
-		tag_free(tc.tag);
-		ringbuf_read_advance(mp, sizeof(struct tag_container));
-		goto retry; /* read and skip packets */
-	} /* else not ready for tag yet */
-out:
-	pthread_mutex_unlock(&read_lock);
-	return tag;
-}
-
-struct mpd_tag *metadata_pipe_current(void)
-{
-	struct mpd_tag *tag;
-
-	assert(! pthread_equal(pthread_self(), dc.thread));
-	if (pthread_mutex_trylock(&read_lock) == EBUSY)
-		return NULL;
-	tag = current_tag ? tag_dup(current_tag) : NULL;
-	pthread_mutex_unlock(&read_lock);
-
-	return tag;
-}
-
-void metadata_pipe_clear(void)
-{
-	struct tag_container tc;
-	size_t r;
-
-	pthread_mutex_lock(&read_lock);
-
-	while ((r = ringbuf_read(mp, &tc, sizeof(struct tag_container)))) {
-		assert(r == sizeof(struct tag_container));
-		tag_free(tc.tag);
-	}
-
-	if (current_tag) {
-		tag_free(current_tag);
-		current_tag = NULL;
-	}
-
-	pthread_mutex_unlock(&read_lock);
-}
diff --git a/src/ringbuf.c b/src/ringbuf.c
deleted file mode 100644
index e99f26fc6..000000000
--- a/src/ringbuf.c
+++ /dev/null
@@ -1,311 +0,0 @@
-/*
- * This file is originally from JACK Audio Connection Kit
- *
- * Copyright (C) 2000 Paul Davis
- * Copyright (C) 2003 Rohan Drape
- *
- * This program 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 2.1 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 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, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
- * ISO/POSIX C version of Paul Davis's lock free ringbuffer C++ code.
- * This is safe for the case of one read thread and one write thread.
- */
-
-#include "ringbuf.h"
-#include "utils.h"
-
-#include <string.h>
-
-#define advance_ptr(ptr,cnt,mask)  ptr = (ptr + cnt) & mask
-
-/*
- * Create a new ringbuffer to hold at least `sz' bytes of data. The
- * actual buffer size is rounded up to the next power of two.
- */
-struct ringbuf *ringbuf_create(size_t sz)
-{
-	struct ringbuf *rb = xmalloc(sizeof(struct ringbuf));
-	size_t power_of_two;
-
-	for (power_of_two = 1; (size_t)(1 << power_of_two) < sz; power_of_two++)
-		/* next power_of_two... */;
-
-	rb->size = 1 << power_of_two;
-	rb->size_mask = rb->size;
-	rb->size_mask -= 1;
-	rb->buf = xmalloc(rb->size);
-	ringbuf_reset(rb);
-
-	return rb;
-}
-
-/* Free all data associated with the ringbuffer `rb'. */
-void ringbuf_free(struct ringbuf * rb)
-{
-	free(rb->buf);
-	free(rb);
-}
-
-/* Reset the read and write pointers to zero. This is not thread safe. */
-void ringbuf_reset(struct ringbuf * rb)
-{
-	rb->read_ptr = 0;
-	rb->write_ptr = 0;
-}
-
-/* Reset the read and write pointers, thread-safe iff called only by writer */
-void ringbuf_writer_reset(struct ringbuf * rb)
-{
-	rb->write_ptr = rb->read_ptr;
-}
-
-/* Reset the read and write pointers, thread-safe iff called only by reader */
-void ringbuf_reader_reset(struct ringbuf * rb)
-{
-	rb->read_ptr = rb->write_ptr;
-}
-
-/*
- * Return the number of bytes available for reading.  This is the
- * number of bytes in front of the read pointer and behind the write
- * pointer.
- */
-size_t ringbuf_read_space(const struct ringbuf * rb)
-{
-	size_t w = rb->write_ptr;
-	size_t r = rb->read_ptr;
-
-	if (w > r)
-		return w - r;
-	else
-		return (w - r + rb->size) & rb->size_mask;
-}
-
-/*
- * Return the number of bytes available for writing.  This is the
- * number of bytes in front of the write pointer and behind the read
- * pointer.
- */
-size_t ringbuf_write_space(const struct ringbuf * rb)
-{
-	size_t w = rb->write_ptr;
-	size_t r = rb->read_ptr;
-
-	if (w > r)
-		return ((r - w + rb->size) & rb->size_mask) - 1;
-	else if (w < r)
-		return (r - w) - 1;
-	else
-		return rb->size - 1;
-}
-
-/*
- * The copying data reader.  Copy at most `cnt' bytes from `rb' to
- * `dest'.  Returns the actual number of bytes copied.
- */
-size_t ringbuf_read(struct ringbuf * rb, void *dest, size_t cnt)
-{
-	size_t free_cnt;
-	size_t cnt2;
-	size_t to_read;
-	size_t n1, n2;
-
-	if ((free_cnt = ringbuf_read_space(rb)) == 0)
-		return 0;
-
-	to_read = cnt > free_cnt ? free_cnt : cnt;
-	cnt2 = rb->read_ptr + to_read;
-
-	if (cnt2 > rb->size) {
-		n1 = rb->size - rb->read_ptr;
-		n2 = cnt2 & rb->size_mask;
-	} else {
-		n1 = to_read;
-		n2 = 0;
-	}
-
-	memcpy(dest, rb->buf + rb->read_ptr, n1);
-	ringbuf_read_advance(rb, n1);
-
-	if (n2) {
-		memcpy((char*)dest + n1, rb->buf + rb->read_ptr, n2);
-		ringbuf_read_advance(rb, n2);
-	}
-
-	return to_read;
-}
-
-/*
- * The copying data reader w/o read pointer advance.  Copy at most
- * `cnt' bytes from `rb' to `dest'.  Returns the actual number of bytes
- * copied.
- */
-size_t ringbuf_peek(struct ringbuf * rb, void *dest, size_t cnt)
-{
-	size_t free_cnt;
-	size_t cnt2;
-	size_t to_read;
-	size_t n1, n2;
-	size_t tmp_read_ptr = rb->read_ptr;
-
-	if ((free_cnt = ringbuf_read_space(rb)) == 0)
-		return 0;
-
-	to_read = cnt > free_cnt ? free_cnt : cnt;
-	cnt2 = tmp_read_ptr + to_read;
-
-	if (cnt2 > rb->size) {
-		n1 = rb->size - tmp_read_ptr;
-		n2 = cnt2 & rb->size_mask;
-	} else {
-		n1 = to_read;
-		n2 = 0;
-	}
-
-	memcpy(dest, rb->buf + tmp_read_ptr, n1);
-	advance_ptr(tmp_read_ptr, n1, rb->size_mask);
-
-	if (n2) {
-		memcpy((char*)dest + n1, rb->buf + tmp_read_ptr, n2);
-		advance_ptr(tmp_read_ptr, n2, rb->size_mask);
-	}
-
-	return to_read;
-}
-
-/*
- * The copying data writer.  Copy at most `cnt' bytes to `rb' from
- * `src'.  Returns the actual number of bytes copied.
- */
-size_t ringbuf_write(struct ringbuf * rb, const void *src, size_t cnt)
-{
-	size_t free_cnt;
-	size_t cnt2;
-	size_t to_write;
-	size_t n1, n2;
-
-	if ((free_cnt = ringbuf_write_space(rb)) == 0)
-		return 0;
-
-	to_write = cnt > free_cnt ? free_cnt : cnt;
-	cnt2 = rb->write_ptr + to_write;
-
-	if (cnt2 > rb->size) {
-		n1 = rb->size - rb->write_ptr;
-		n2 = cnt2 & rb->size_mask;
-	} else {
-		n1 = to_write;
-		n2 = 0;
-	}
-
-	memcpy(rb->buf + rb->write_ptr, src, n1);
-	ringbuf_write_advance(rb, n1);
-
-	if (n2) {
-		memcpy(rb->buf + rb->write_ptr, (const char*)src + n1, n2);
-		ringbuf_write_advance(rb, n2);
-	}
-
-	return to_write;
-}
-
-/* Advance the read pointer `cnt' places. */
-void ringbuf_read_advance(struct ringbuf * rb, size_t cnt)
-{
-	advance_ptr(rb->read_ptr, cnt, rb->size_mask);
-}
-
-/* Advance the write pointer `cnt' places. */
-void ringbuf_write_advance(struct ringbuf * rb, size_t cnt)
-{
-	advance_ptr(rb->write_ptr, cnt, rb->size_mask);
-}
-
-/*
- * The non-copying data reader.  `vec' is an array of two places.  Set
- * the values at `vec' to hold the current readable data at `rb'.  If
- * the readable data is in one segment the second segment has zero
- * length.
- */
-size_t ringbuf_get_read_vector(const struct ringbuf * rb, struct iovec * vec)
-{
-	size_t free_cnt;
-	size_t cnt2;
-	size_t w = rb->write_ptr;
-	size_t r = rb->read_ptr;
-
-	if (w > r)
-		free_cnt = w - r;
-	else
-		free_cnt = (w - r + rb->size) & rb->size_mask;
-
-	cnt2 = r + free_cnt;
-
-	if (cnt2 > rb->size) {
-		/*
-		 * Two part vector: the rest of the buffer after the current
-		 * write ptr, plus some from the start of the buffer.
-		 */
-		vec[0].iov_base = rb->buf + r;
-		vec[0].iov_len = rb->size - r;
-		vec[1].iov_base = rb->buf;
-		vec[1].iov_len = cnt2 & rb->size_mask;
-	} else {
-		/* Single part vector: just the rest of the buffer */
-		vec[0].iov_base = rb->buf + r;
-		vec[0].iov_len = free_cnt;
-		vec[1].iov_len = 0;
-	}
-	return vec[0].iov_len + vec[1].iov_len;
-}
-
-/*
- * The non-copying data writer.  `vec' is an array of two places.  Set
- * the values at `vec' to hold the current writeable data at `rb'.  If
- * the writeable data is in one segment the second segment has zero
- * length.
- */
-size_t ringbuf_get_write_vector(const struct ringbuf * rb, struct iovec * vec)
-{
-	size_t free_cnt;
-	size_t cnt2;
-	size_t w = rb->write_ptr;
-	size_t r = rb->read_ptr;
-
-	if (w > r)
-		free_cnt = ((r - w + rb->size) & rb->size_mask) - 1;
-	else if (w < r)
-		free_cnt = (r - w) - 1;
-	else
-		free_cnt = rb->size - 1;
-
-	cnt2 = w + free_cnt;
-
-	if (cnt2 > rb->size) {
-		/*
-		 * Two part vector: the rest of the buffer after the current
-		 * write ptr, plus some from the start of the buffer.
-		 */
-		vec[0].iov_base = rb->buf + w;
-		vec[0].iov_len = rb->size - w;
-		vec[1].iov_base = rb->buf;
-		vec[1].iov_len = cnt2 & rb->size_mask;
-	} else {
-		vec[0].iov_base = rb->buf + w;
-		vec[0].iov_len = free_cnt;
-		vec[1].iov_len = 0;
-	}
-	return vec[0].iov_len + vec[1].iov_len;
-}
-
diff --git a/src/ringbuf.h b/src/ringbuf.h
deleted file mode 100644
index f45ab2da9..000000000
--- a/src/ringbuf.h
+++ /dev/null
@@ -1,227 +0,0 @@
-/*
- * This file is originally from JACK Audio Connection Kit
- *
- * Copyright (C) 2000 Paul Davis
- * Copyright (C) 2003 Rohan Drape
- *
- * This program 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 2.1 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 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, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- */
-
-#ifndef MPD_RINGBUF_H
-#define MPD_RINGBUF_H
-
-#include <stddef.h>
-#include <sys/uio.h>
-
-/** @file ringbuf.h
- *
- * A set of library functions to make lock-free ringbuffers available
- * to JACK clients.  The `capture_client.c' (in the example_clients
- * directory) is a fully functioning user of this API.
- *
- * The key attribute of a ringbuffer is that it can be safely accessed
- * by two threads simultaneously -- one reading from the buffer and
- * the other writing to it -- without using any synchronization or
- * mutual exclusion primitives.  For this to work correctly, there can
- * only be a single reader and a single writer thread.  Their
- * identities cannot be interchanged.
- */
-
-struct ringbuf {
-	unsigned char *buf;
-	size_t write_ptr;
-	size_t read_ptr;
-	size_t size;
-	size_t size_mask;
-};
-
-/**
- * Allocates a ringbuffer data structure of a specified size. The
- * caller must arrange for a call to ringbuf_free() to release
- * the memory associated with the ringbuffer.
- *
- * @param sz the ringbuffer size in bytes.
- *
- * @return a pointer to a new struct ringbuf, if successful; NULL
- * otherwise.
- */
-struct ringbuf *ringbuf_create(size_t sz);
-
-/**
- * Frees the ringbuffer data structure allocated by an earlier call to
- * ringbuf_create().
- *
- * @param rb a pointer to the ringbuffer structure.
- */
-void ringbuf_free(struct ringbuf * rb);
-
-/**
- * Fill a data structure with a description of the current readable
- * data held in the ringbuffer.  This description is returned in a two
- * element array of struct iovec.  Two elements are needed
- * because the data to be read may be split across the end of the
- * ringbuffer.
- *
- * The first element will always contain a valid @a len field, which
- * may be zero or greater.  If the @a len field is non-zero, then data
- * can be read in a contiguous fashion using the address given in the
- * corresponding @a buf field.
- *
- * If the second element has a non-zero @a len field, then a second
- * contiguous stretch of data can be read from the address given in
- * its corresponding @a buf field.
- *
- * @param rb a pointer to the ringbuffer structure.
- * @param vec a pointer to a 2 element array of struct iovec.
- *
- * @return total number of bytes readable into both vec elements
- */
-size_t ringbuf_get_read_vector(const struct ringbuf * rb, struct iovec * vec);
-
-/**
- * Fill a data structure with a description of the current writable
- * space in the ringbuffer.  The description is returned in a two
- * element array of struct iovec.  Two elements are needed
- * because the space available for writing may be split across the end
- * of the ringbuffer.
- *
- * The first element will always contain a valid @a len field, which
- * may be zero or greater.  If the @a len field is non-zero, then data
- * can be written in a contiguous fashion using the address given in
- * the corresponding @a buf field.
- *
- * If the second element has a non-zero @a len field, then a second
- * contiguous stretch of data can be written to the address given in
- * the corresponding @a buf field.
- *
- * @param rb a pointer to the ringbuffer structure.
- * @param vec a pointer to a 2 element array of struct iovec.
- *
- * @return total number of bytes writable in both vec elements
- */
-size_t ringbuf_get_write_vector(const struct ringbuf * rb, struct iovec * vec);
-
-/**
- * Read data from the ringbuffer.
- *
- * @param rb a pointer to the ringbuffer structure.
- * @param dest a pointer to a buffer where data read from the
- * ringbuffer will go.
- * @param cnt the number of bytes to read.
- *
- * @return the number of bytes read, which may range from 0 to cnt.
- */
-size_t ringbuf_read(struct ringbuf * rb, void *dest, size_t cnt);
-
-/**
- * Read data from the ringbuffer. Opposed to ringbuf_read()
- * this function does not move the read pointer. Thus it's
- * a convenient way to inspect data in the ringbuffer in a
- * continous fashion. The price is that the data is copied
- * into a user provided buffer. For "raw" non-copy inspection
- * of the data in the ringbuffer use ringbuf_get_read_vector().
- *
- * @param rb a pointer to the ringbuffer structure.
- * @param dest a pointer to a buffer where data read from the
- * ringbuffer will go.
- * @param cnt the number of bytes to read.
- *
- * @return the number of bytes read, which may range from 0 to cnt.
- */
-size_t ringbuf_peek(struct ringbuf * rb, void *dest, size_t cnt);
-
-/**
- * Advance the read pointer.
- *
- * After data have been read from the ringbuffer using the pointers
- * returned by ringbuf_get_read_vector(), use this function to
- * advance the buffer pointers, making that space available for future
- * write operations.
- *
- * @param rb a pointer to the ringbuffer structure.
- * @param cnt the number of bytes read.
- */
-void ringbuf_read_advance(struct ringbuf * rb, size_t cnt);
-
-/**
- * Return the number of bytes available for reading.
- *
- * @param rb a pointer to the ringbuffer structure.
- *
- * @return the number of bytes available to read.
- */
-size_t ringbuf_read_space(const struct ringbuf * rb);
-
-/**
- * Reset the read and write pointers, making an empty buffer.
- *
- * This is not thread safe.
- *
- * @param rb a pointer to the ringbuffer structure.
- */
-void ringbuf_reset(struct ringbuf * rb);
-
-/**
- * Reset the write pointer to the read pointer, making an empty buffer.
- *
- * This should only be called by the writer
- *
- * @param rb a pointer to the ringbuffer structure.
- */
-void ringbuf_writer_reset(struct ringbuf * rb);
-
-/**
- * Reset the read pointer to the write pointer, making an empty buffer.
- *
- * This should only be called by the reader
- *
- * @param rb a pointer to the ringbuffer structure.
- */
-void ringbuf_reader_reset(struct ringbuf * rb);
-
-/**
- * Write data into the ringbuffer.
- *
- * @param rb a pointer to the ringbuffer structure.
- * @param src a pointer to the data to be written to the ringbuffer.
- * @param cnt the number of bytes to write.
- *
- * @return the number of bytes write, which may range from 0 to cnt
- */
-size_t ringbuf_write(struct ringbuf * rb, const void *src, size_t cnt);
-
-/**
- * Advance the write pointer.
- *
- * After data have been written the ringbuffer using the pointers
- * returned by ringbuf_get_write_vector(), use this function
- * to advance the buffer pointer, making the data available for future
- * read operations.
- *
- * @param rb a pointer to the ringbuffer structure.
- * @param cnt the number of bytes written.
- */
-void ringbuf_write_advance(struct ringbuf * rb, size_t cnt);
-
-/**
- * Return the number of bytes available for writing.
- *
- * @param rb a pointer to the ringbuffer structure.
- *
- * @return the amount of free space (in bytes) available for writing.
- */
-size_t ringbuf_write_space(const struct ringbuf * rb);
-
-#endif /* RINGBUF_H */