1 files changed, 79 insertions, 0 deletions
diff --git a/src/MusicBuffer.cxx b/src/MusicBuffer.cxx
new file mode 100644
index 000000000..ea03fc0b9
--- /dev/null
+++ b/src/MusicBuffer.cxx
@@ -0,0 +1,79 @@
+/*
+ * Copyright (C) 2003-2013 The Music Player Daemon Project
+ * 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.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#include "config.h"
+#include "MusicBuffer.hxx"
+#include "MusicChunk.hxx"
+#include "thread/Mutex.hxx"
+#include "util/SliceBuffer.hxx"
+#include "mpd_error.h"
+
+#include <assert.h>
+
+struct music_buffer : public SliceBuffer<music_chunk>  {
+	/** a mutex which protects #available */
+	Mutex mutex;
+
+	music_buffer(unsigned num_chunks)
+		:SliceBuffer(num_chunks) {
+		if (IsOOM())
+			MPD_ERROR("Failed to allocate buffer");
+	}
+};
+
+struct music_buffer *
+music_buffer_new(unsigned num_chunks)
+{
+	return new music_buffer(num_chunks);
+}
+
+void
+music_buffer_free(struct music_buffer *buffer)
+{
+	delete buffer;
+}
+
+unsigned
+music_buffer_size(const struct music_buffer *buffer)
+{
+	return buffer->GetCapacity();
+}
+
+struct music_chunk *
+music_buffer_allocate(struct music_buffer *buffer)
+{
+	const ScopeLock protect(buffer->mutex);
+	return buffer->Allocate();
+}
+
+void
+music_buffer_return(struct music_buffer *buffer, struct music_chunk *chunk)
+{
+	assert(buffer != NULL);
+	assert(chunk != NULL);
+
+	const ScopeLock protect(buffer->mutex);
+
+	if (chunk->other != nullptr) {
+		assert(chunk->other->other == nullptr);
+		buffer->Free(chunk->other);
+	}
+
+	buffer->Free(chunk);
+}