1 files changed, 114 insertions, 0 deletions
diff --git a/web/server/h2o/libh2o/include/h2o/cache.h b/web/server/h2o/libh2o/include/h2o/cache.h
new file mode 100644
index 00000000..4eae70c9
--- /dev/null
+++ b/web/server/h2o/libh2o/include/h2o/cache.h
@@ -0,0 +1,114 @@
+/*
+ * Copyright (c) 2014-2016 DeNA Co., Ltd., Kazuho Oku
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to
+ * deal in the Software without restriction, including without limitation the
+ * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+ * sell copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ */
+#ifndef h2o__cache_h
+#define h2o__cache_h
+
+#include <stdint.h>
+#include "h2o/linklist.h"
+#include "h2o/memory.h"
+
+typedef struct st_h2o_cache_t h2o_cache_t;
+
+typedef uint32_t /* eq. khint_t */ h2o_cache_hashcode_t;
+
+typedef struct st_h2o_cache_key_t {
+    h2o_iovec_t vec;
+    h2o_cache_hashcode_t hash;
+} h2o_cache_key_t;
+
+typedef struct st_h2o_cache_ref_t {
+    h2o_iovec_t key;
+    h2o_cache_hashcode_t keyhash;
+    uint64_t at;
+    h2o_iovec_t value;
+    int _requested_early_update;
+    h2o_linklist_t _lru_link;
+    h2o_linklist_t _age_link;
+    size_t _refcnt;
+} h2o_cache_ref_t;
+
+/**
+ * calculates the hash code of a key
+ */
+h2o_cache_hashcode_t h2o_cache_calchash(const char *s, size_t len);
+
+enum {
+    /**
+     * if set, the internals of the cache is protected by a mutex so that it can be accessed concurrently
+     */
+    H2O_CACHE_FLAG_MULTITHREADED = 0x1,
+    /**
+     * if set, the cache triggers an early update
+     */
+    H2O_CACHE_FLAG_EARLY_UPDATE = 0x2
+};
+
+/**
+ * creates a new cache
+ */
+h2o_cache_t *h2o_cache_create(int flags, size_t capacity, uint64_t duration, void (*destroy_cb)(h2o_iovec_t value));
+/**
+ * destroys a cache
+ */
+void h2o_cache_destroy(h2o_cache_t *cache);
+/**
+ * clears a cache
+ */
+void h2o_cache_clear(h2o_cache_t *cache);
+/**
+ * returns a value named by key from the cache if found, or else returns NULL
+ * @param cache
+ * @param now
+ * @param key
+ * @param keyhash callers may optionally pass in the precalculated hash value (or should be set to 0)
+ */
+h2o_cache_ref_t *h2o_cache_fetch(h2o_cache_t *cache, uint64_t now, h2o_iovec_t key, h2o_cache_hashcode_t keyhash);
+/**
+ * releases the reference returned by h2o_cache_fetch
+ */
+void h2o_cache_release(h2o_cache_t *cache, h2o_cache_ref_t *ref);
+/**
+ * sets the value of the cache
+ * @param cache
+ * @param now
+ * @param key
+ * @param keyhash callers may optionally pass in the precalculated hash value (or should be set to 0)
+ * @param value (when no longer needed, destroy_cb will be called)
+ * @return if the specified value already existed
+ */
+int h2o_cache_set(h2o_cache_t *cache, uint64_t now, h2o_iovec_t key, h2o_cache_hashcode_t keyhash, h2o_iovec_t value);
+/**
+ * deletes a named value from the cache
+ * @param cache
+ * @param now
+ * @param key
+ * @param keyhash callers may optionally pass in the precalculated hash value (or should be set to 0)
+ */
+void h2o_cache_delete(h2o_cache_t *cache, uint64_t now, h2o_iovec_t key, h2o_cache_hashcode_t keyhash);
+
+/**
+ * getter functions
+ */
+size_t h2o_cache_get_capacity(h2o_cache_t *cache);
+uint64_t h2o_cache_get_duration(h2o_cache_t *cache);
+
+#endif