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/* -*- Mode: C; c-basic-offset: 4; indent-tabs-mode: nil -*- */
/*
Copyright (C) 2009-2015 Red Hat, Inc.
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, see <http://www.gnu.org/licenses/>.
*/
#ifndef _PIXMAP_CACHE_H
# define _PIXMAP_CACHE_H
#include "red-channel.h"
#define MAX_CACHE_CLIENTS 4
#define BITS_CACHE_HASH_SHIFT 10
#define BITS_CACHE_HASH_SIZE (1 << BITS_CACHE_HASH_SHIFT)
#define BITS_CACHE_HASH_MASK (BITS_CACHE_HASH_SIZE - 1)
#define BITS_CACHE_HASH_KEY(id) ((id) & BITS_CACHE_HASH_MASK)
typedef struct PixmapCache PixmapCache;
typedef struct NewCacheItem NewCacheItem;
struct NewCacheItem {
RingItem lru_link;
NewCacheItem *next;
uint64_t id;
uint64_t sync[MAX_CACHE_CLIENTS];
size_t size;
int lossy;
};
struct PixmapCache {
RingItem base;
pthread_mutex_t lock;
uint8_t id;
uint32_t refs;
NewCacheItem *hash_table[BITS_CACHE_HASH_SIZE];
Ring lru;
int64_t available;
int64_t size;
int32_t items;
int freezed;
RingItem *freezed_head;
RingItem *freezed_tail;
uint32_t generation;
struct {
uint8_t client;
uint64_t message;
} generation_initiator;
uint64_t sync[MAX_CACHE_CLIENTS]; // here CLIENTS refer to different channel
// clients of the same client
RedClient *client;
};
PixmapCache *pixmap_cache_get(RedClient *client, uint8_t id, int64_t size);
void pixmap_cache_unref(PixmapCache *cache);
void pixmap_cache_clear(PixmapCache *cache);
int pixmap_cache_unlocked_set_lossy(PixmapCache *cache, uint64_t id, int lossy);
int pixmap_cache_freeze(PixmapCache *cache);
#endif /* _PIXMAP_CACHE_H */
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