39 lines
817 B
C++
39 lines
817 B
C++
// SPDX-License-Identifier: GPL-2.0-or-later
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// Copyright The Music Player Daemon Project
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#include "MusicBuffer.hxx"
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#include "MusicChunk.hxx"
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#include <cassert>
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MusicBuffer::MusicBuffer(unsigned num_chunks)
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:buffer(num_chunks)
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{
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buffer.SetName("MusicBuffer");
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}
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MusicChunkPtr
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MusicBuffer::Allocate() noexcept
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{
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const std::scoped_lock<Mutex> protect(mutex);
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return {buffer.Allocate(), MusicChunkDeleter(*this)};
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}
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void
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MusicBuffer::Return(MusicChunk *chunk) noexcept
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{
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assert(chunk != nullptr);
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/* these attributes need to be cleared before locking the
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mutex, because they might recursively call this method,
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causing a deadlock */
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chunk->next.reset();
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chunk->other.reset();
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const std::scoped_lock<Mutex> protect(mutex);
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assert(!chunk->other || !chunk->other->other);
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buffer.Free(chunk);
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}
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