server: move some pixmap cache code in own file

Remove that hideous template header that should really be regular code
since it's specialized and instanciated only for pixmap.

Acked-by: Frediano Ziglio <fziglio@redhat.com>

1 files changed, 142 insertions, 0 deletions

diff --git a/server/pixmap-cache.c b/server/pixmap-cache.c
new file mode 100644
index 00000000..61d225e8
--- /dev/null
+++ b/server/pixmap-cache.c
@@ -0,0 +1,142 @@
+/*
+   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/>.
+*/
+#include "pixmap-cache.h"
+
+int pixmap_cache_unlocked_set_lossy(PixmapCache *cache, uint64_t id, int lossy)
+{
+    NewCacheItem *item;
+
+    item = cache->hash_table[BITS_CACHE_HASH_KEY(id)];
+
+    while (item) {
+        if (item->id == id) {
+            item->lossy = lossy;
+            break;
+        }
+        item = item->next;
+    }
+    return !!item;
+}
+
+void pixmap_cache_clear(PixmapCache *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) * BITS_CACHE_HASH_SIZE);
+
+    cache->available = cache->size;
+    cache->items = 0;
+}
+
+int pixmap_cache_freeze(PixmapCache *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) * BITS_CACHE_HASH_SIZE);
+    cache->available = -1;
+    cache->freezed = TRUE;
+
+    pthread_mutex_unlock(&cache->lock);
+    return TRUE;
+}
+
+static void pixmap_cache_destroy(PixmapCache *cache)
+{
+    spice_assert(cache);
+
+    pthread_mutex_lock(&cache->lock);
+    pixmap_cache_clear(cache);
+    pthread_mutex_unlock(&cache->lock);
+}
+
+
+static pthread_mutex_t cache_lock = PTHREAD_MUTEX_INITIALIZER;
+static Ring pixmap_cache_list = {&pixmap_cache_list, &pixmap_cache_list};
+
+static PixmapCache *pixmap_cache_new(RedClient *client, uint8_t id, int64_t size)
+{
+    PixmapCache *cache = spice_new0(PixmapCache, 1);
+
+    ring_item_init(&cache->base);
+    pthread_mutex_init(&cache->lock, NULL);
+    cache->id = id;
+    cache->refs = 1;
+    ring_init(&cache->lru);
+    cache->available = size;
+    cache->size = size;
+    cache->client = client;
+
+    return cache;
+}
+
+PixmapCache *pixmap_cache_get(RedClient *client, uint8_t id, int64_t size)
+{
+    PixmapCache *ret = NULL;
+    RingItem *now;
+    pthread_mutex_lock(&cache_lock);
+
+    now = &pixmap_cache_list;
+    while ((now = ring_next(&pixmap_cache_list, now))) {
+        PixmapCache *cache = (PixmapCache *)now;
+        if ((cache->client == client) && (cache->id == id)) {
+            ret = cache;
+            ret->refs++;
+            break;
+        }
+    }
+    if (!ret) {
+        ret = pixmap_cache_new(client, id, size);
+        ring_add(&pixmap_cache_list, &ret->base);
+    }
+    pthread_mutex_unlock(&cache_lock);
+    return ret;
+}
+
+
+void pixmap_cache_unref(PixmapCache *cache)
+{
+    if (!cache)
+        return;
+
+    pthread_mutex_lock(&cache_lock);
+    if (--cache->refs) {
+        pthread_mutex_unlock(&cache_lock);
+        return;
+    }
+    ring_remove(&cache->base);
+    pthread_mutex_unlock(&cache_lock);
+    pixmap_cache_destroy(cache);
+    free(cache);
+}