80 lines
1.9 KiB
C++
80 lines
1.9 KiB
C++
/*
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* Copyright (C) 2003-2013 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 "thread/Mutex.hxx"
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#include "util/SliceBuffer.hxx"
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#include "mpd_error.h"
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#include <assert.h>
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struct music_buffer : public SliceBuffer<music_chunk> {
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/** a mutex which protects #available */
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Mutex mutex;
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music_buffer(unsigned num_chunks)
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:SliceBuffer(num_chunks) {
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if (IsOOM())
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MPD_ERROR("Failed to allocate buffer");
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}
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};
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struct music_buffer *
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music_buffer_new(unsigned num_chunks)
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{
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return new music_buffer(num_chunks);
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}
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void
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music_buffer_free(struct music_buffer *buffer)
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{
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delete buffer;
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}
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unsigned
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music_buffer_size(const struct music_buffer *buffer)
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{
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return buffer->GetCapacity();
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}
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struct music_chunk *
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music_buffer_allocate(struct music_buffer *buffer)
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{
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const ScopeLock protect(buffer->mutex);
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return buffer->Allocate();
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}
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void
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music_buffer_return(struct music_buffer *buffer, struct music_chunk *chunk)
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{
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assert(buffer != NULL);
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assert(chunk != NULL);
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const ScopeLock protect(buffer->mutex);
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if (chunk->other != nullptr) {
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assert(chunk->other->other == nullptr);
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buffer->Free(chunk->other);
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}
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buffer->Free(chunk);
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}
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