1 files changed, 76 insertions, 0 deletions
diff --git a/server/pixmap-cache.h b/server/pixmap-cache.h
new file mode 100644
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--- /dev/null
+++ b/server/pixmap-cache.h
@@ -0,0 +1,76 @@
+/* -*- 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"
+#include "spice_server_utils.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 DisplayChannelClient DisplayChannelClient;
+
+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 */