Don't keep audio files open except when they are actually being read

[disorder] / lib / cache.h

/*
 * This file is part of DisOrder
 * Copyright (C) 2006-2008 Richard Kettlewell
 *
 * 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 3 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, see <http://www.gnu.org/licenses/>.
 */
/** @file lib/cache.h
 * @brief Object caching
 *
 * There is a single cache for the whole process.  Objects of different types
 * are distinguished.  Objects might be thrown out of the cache at any point.
 */

#ifndef CACHE_H
#define CACHE_H

/* Defines a cache mapping keys to typed data items */

/** @brief Type of a cache object */
struct cache_type {
  /** @brief Lifetime for objects of this type (seconds) */
  int lifetime;
};

void cache_put(const struct cache_type *type,
               const char *key, const void *value);
/* Inserts KEY into the cache with value VALUE.  If KEY is already
 * present it is overwritten. */

const void *cache_get(const struct cache_type *type, const char *key);
/* Get a value from the cache. */

void cache_expire(void);
/* Expire values from the cache */

void cache_clean(const struct cache_type *type);
/* Clean all elements of a particular type, or all elements if TYPE=0 */

size_t cache_count(void);
/* Return the size of the cache */

#endif /* CACHE_H */

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*/