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-rw-r--r--src/MusicBuffer.cxx79
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);
+}