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-rw-r--r--src/plugins/http_static/http_cache.h78
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diff --git a/src/plugins/http_static/http_cache.h b/src/plugins/http_static/http_cache.h
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+/*
+ * Copyright (c) 2022 Cisco and/or its affiliates.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef SRC_PLUGINS_HTTP_STATIC_HTTP_CACHE_H_
+#define SRC_PLUGINS_HTTP_STATIC_HTTP_CACHE_H_
+
+#include <vppinfra/bihash_vec8_8.h>
+
+typedef struct hss_cache_entry_
+{
+ /** Name of the file */
+ u8 *filename;
+ /** Contents of the file, as a u8 * vector */
+ u8 *data;
+ /** Last time the cache entry was used */
+ f64 last_used;
+ /** Cache LRU links */
+ u32 next_index;
+ u32 prev_index;
+ /** Reference count, so we don't recycle while referenced */
+ int inuse;
+} hss_cache_entry_t;
+
+typedef struct hss_cache_
+{
+ /** Unified file data cache pool */
+ hss_cache_entry_t *cache_pool;
+ /** Hash table which maps file name to file data */
+ BVT (clib_bihash) name_to_data;
+
+ /** Session pool lock */
+ clib_spinlock_t cache_lock;
+
+ /** Current cache size */
+ u64 cache_size;
+ /** Max cache size in bytes */
+ u64 cache_limit;
+ /** Number of cache evictions */
+ u64 cache_evictions;
+
+ /** Cache LRU listheads */
+ u32 first_index;
+ u32 last_index;
+
+ u8 debug_level;
+} hss_cache_t;
+
+u32 hss_cache_lookup_and_attach (hss_cache_t *hc, u8 *path, u8 **data,
+ u64 *data_len);
+u32 hss_cache_add_and_attach (hss_cache_t *hc, u8 *path, u8 **data,
+ u64 *data_len);
+void hss_cache_detach_entry (hss_cache_t *hc, u32 ce_index);
+u32 hss_cache_clear (hss_cache_t *hc);
+void hss_cache_init (hss_cache_t *hc, uword cache_size, u8 debug_level);
+
+u8 *format_hss_cache (u8 *s, va_list *args);
+
+#endif /* SRC_PLUGINS_HTTP_STATIC_HTTP_CACHE_H_ */
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */