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/*
Copyright (C) 2009 Red Hat, Inc.
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 2 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/>.
*/
#if defined(CLIENT_PIXMAPS_CACHE)
#define CACHE PixmapCache
#define CACHE_NAME bits_cache
#define CACHE_HASH_KEY BITS_CACHE_HASH_KEY
#define CACHE_HASH_SIZE BITS_CACHE_HASH_SIZE
#define PIPE_ITEM_TYPE PIPE_ITEM_TYPE_INVAL_PIXMAP
#define FUNC_NAME(name) pixmap_cache_##name
#define PRIVATE_FUNC_NAME(name) __pixmap_cache_##name
#define CHANNEL DisplayChannel
#define CACH_GENERATION pixmap_cache_generation
#define INVAL_ALL_VERB RED_DISPLAY_INVAL_ALL_PIXMAPS
#else
#error "no cache type."
#endif
static int FUNC_NAME(hit)(CACHE *cache, uint64_t id, CHANNEL *channel)
{
NewCacheItem *item;
uint64_t serial;
serial = channel_message_serial((RedChannel *)channel);
pthread_mutex_lock(&cache->lock);
item = cache->hash_table[CACHE_HASH_KEY(id)];
while (item) {
if (item->id == id) {
ring_remove(&item->lru_link);
ring_add(&cache->lru, &item->lru_link);
ASSERT(channel->base.id < MAX_CACHE_CLIENTS)
item->sync[channel->base.id] = serial;
cache->sync[channel->base.id] = serial;
break;
}
item = item->next;
}
pthread_mutex_unlock(&cache->lock);
return !!item;
}
static int FUNC_NAME(add)(CACHE *cache, uint64_t id, uint32_t size, CHANNEL *channel)
{
NewCacheItem *item;
uint64_t serial;
int key;
ASSERT(size > 0);
item = malloc(sizeof(*item));
if (!item) {
return FALSE;
}
serial = channel_message_serial((RedChannel *)channel);
pthread_mutex_lock(&cache->lock);
if (cache->generation != channel->CACH_GENERATION) {
if (!channel->pending_pixmaps_sync) {
red_pipe_add_type((RedChannel *)channel, PIPE_ITEM_TYPE_PIXMAP_SYNC);
channel->pending_pixmaps_sync = TRUE;
}
pthread_mutex_unlock(&cache->lock);
free(item);
return FALSE;
}
cache->available -= size;
while (cache->available < 0) {
NewCacheItem *tail;
NewCacheItem **now;
if (!(tail = (NewCacheItem *)ring_get_tail(&cache->lru)) ||
tail->sync[channel->base.id] == serial) {
cache->available += size;
pthread_mutex_unlock(&cache->lock);
free(item);
return FALSE;
}
now = &cache->hash_table[CACHE_HASH_KEY(tail->id)];
for (;;) {
ASSERT(*now);
if (*now == tail) {
*now = tail->next;
break;
}
now = &(*now)->next;
}
ring_remove(&tail->lru_link);
cache->items--;
cache->available += tail->size;
cache->sync[channel->base.id] = serial;
display_channel_push_release(channel, RED_RES_TYPE_PIXMAP, tail->id, tail->sync);
free(tail);
}
++cache->items;
item->next = cache->hash_table[(key = CACHE_HASH_KEY(id))];
cache->hash_table[key] = item;
ring_item_init(&item->lru_link);
ring_add(&cache->lru, &item->lru_link);
item->id = id;
item->size = size;
memset(item->sync, 0, sizeof(item->sync));
item->sync[channel->base.id] = serial;
cache->sync[channel->base.id] = serial;
pthread_mutex_unlock(&cache->lock);
return TRUE;
}
static void PRIVATE_FUNC_NAME(clear)(CACHE *cache)
{
NewCacheItem *item;
if (cache->freezed) {
cache->lru.next = cache->freezed_head;
cache->lru.prev = cache->freezed_tail;
cache->freezed = FALSE;
}
while ((item = (NewCacheItem *)ring_get_head(&cache->lru))) {
ring_remove(&item->lru_link);
free(item);
}
memset(cache->hash_table, 0, sizeof(*cache->hash_table) * CACHE_HASH_SIZE);
cache->available = cache->size;
cache->items = 0;
}
static void FUNC_NAME(reset)(CACHE *cache, CHANNEL *channel, RedWaitForChannels* sync_data)
{
uint8_t wait_count;
uint64_t serial;
uint32_t i;
serial = channel_message_serial((RedChannel *)channel);
pthread_mutex_lock(&cache->lock);
PRIVATE_FUNC_NAME(clear)(cache);
channel->CACH_GENERATION = ++cache->generation;
cache->generation_initiator.client = channel->base.id;
cache->generation_initiator.message = serial;
cache->sync[channel->base.id] = serial;
wait_count = 0;
for (i = 0; i < MAX_CACHE_CLIENTS; i++) {
if (cache->sync[i] && i != channel->base.id) {
sync_data->wait_list[wait_count].channel_type = RED_CHANNEL_DISPLAY;
sync_data->wait_list[wait_count].channel_id = i;
sync_data->wait_list[wait_count++].message_serial = cache->sync[i];
}
}
sync_data->wait_count = wait_count;
pthread_mutex_unlock(&cache->lock);
}
static int FUNC_NAME(freeze)(CACHE *cache)
{
pthread_mutex_lock(&cache->lock);
if (cache->freezed) {
pthread_mutex_unlock(&cache->lock);
return FALSE;
}
cache->freezed_head = cache->lru.next;
cache->freezed_tail = cache->lru.prev;
ring_init(&cache->lru);
memset(cache->hash_table, 0, sizeof(*cache->hash_table) * CACHE_HASH_SIZE);
cache->available = -1;
cache->freezed = TRUE;
pthread_mutex_unlock(&cache->lock);
return TRUE;
}
static void FUNC_NAME(destroy)(CACHE *cache)
{
ASSERT(cache);
pthread_mutex_lock(&cache->lock);
PRIVATE_FUNC_NAME(clear)(cache);
pthread_mutex_unlock(&cache->lock);
}
#undef CACHE_NAME
#undef CACHE_HASH_KEY
#undef CACHE_HASH_SIZE
#undef CACHE_INVAL_TYPE
#undef CACHE_MAX_CLIENT_SIZE
#undef FUNC_NAME
#undef VAR_NAME
#undef CHANNEL
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