61 lines
2 KiB
C
61 lines
2 KiB
C
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/***************************************************************************
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* __________ __ ___.
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* Open \______ \ ____ ____ | | _\_ |__ _______ ___
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* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
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* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
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* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
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* \/ \/ \/ \/ \/
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* $Id$
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*
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* Copyright (C) 2014 by Michael Sevakis
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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* KIND, either express or implied.
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*
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****************************************************************************/
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#ifndef DISK_CACHE_H
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#define DISK_CACHE_H
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#include "mutex.h"
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#include "mv.h"
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static inline void dc_lock_cache(void)
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{
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extern struct mutex disk_cache_mutex;
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mutex_lock(&disk_cache_mutex);
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}
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static inline void dc_unlock_cache(void)
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{
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extern struct mutex disk_cache_mutex;
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mutex_unlock(&disk_cache_mutex);
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}
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void * dc_cache_probe(IF_MV(int volume,) unsigned long secnum,
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unsigned int *flags);
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void dc_dirty_buf(void *buf);
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void dc_discard_buf(void *buf);
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void dc_commit_all(IF_MV_NONVOID(int volume));
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void dc_discard_all(IF_MV_NONVOID(int volume));
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void dc_init(void) INIT_ATTR;
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/* in addition to filling, writeback is implemented by the client */
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extern void dc_writeback_callback(IF_MV(int volume, ) unsigned long sector,
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void *buf);
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/** These synchronize and can be called by anyone **/
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/* expropriate a buffer from the cache of DC_CACHE_BUFSIZE bytes */
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void * dc_get_buffer(void);
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/* return buffer to the cache by buffer */
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void dc_release_buffer(void *buf);
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#endif /* DISK_CACHE_H */
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