54 lines
1.5 KiB
C++
54 lines
1.5 KiB
C++
/*
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* Copyright 2003-2017 The Music Player Daemon Project
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* http://www.musicpd.org
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#include "config.h"
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#include "MusicBuffer.hxx"
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#include "MusicChunk.hxx"
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#include <assert.h>
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MusicBuffer::MusicBuffer(unsigned num_chunks) noexcept
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:buffer(num_chunks) {
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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::lock_guard<Mutex> protect(mutex);
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return MusicChunkPtr(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::lock_guard<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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