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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-13 21:12:02 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-13 21:12:02 +0000 |
commit | 77e50caaf2ef81cd91075cf836fed0e75718ffb4 (patch) | |
tree | 53b7b411290b63192fc9e924a3b6b65cdf67e9d0 /debian/vendor-h2o/include/h2o/cache.h | |
parent | Adding upstream version 1.8.3. (diff) | |
download | dnsdist-77e50caaf2ef81cd91075cf836fed0e75718ffb4.tar.xz dnsdist-77e50caaf2ef81cd91075cf836fed0e75718ffb4.zip |
Adding debian version 1.8.3-2.debian/1.8.3-2
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'debian/vendor-h2o/include/h2o/cache.h')
-rw-r--r-- | debian/vendor-h2o/include/h2o/cache.h | 114 |
1 files changed, 114 insertions, 0 deletions
diff --git a/debian/vendor-h2o/include/h2o/cache.h b/debian/vendor-h2o/include/h2o/cache.h new file mode 100644 index 0000000..4eae70c --- /dev/null +++ b/debian/vendor-h2o/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 |