mirror of https://github.com/yshui/picom.git
46 lines
1.1 KiB
C
46 lines
1.1 KiB
C
#include <uthash.h>
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#include "cache.h"
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struct cache_handle *cache_get(struct cache *c, const char *key, size_t keylen) {
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struct cache_handle *e;
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HASH_FIND(hh, c->entries, key, keylen, e);
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return e;
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}
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int cache_get_or_fetch(struct cache *c, const char *key, size_t keylen,
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struct cache_handle **value, void *user_data, cache_getter_t getter) {
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*value = cache_get(c, key, keylen);
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if (*value) {
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return 0;
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}
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int err = getter(c, key, keylen, value, user_data);
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assert(err <= 0);
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if (err < 0) {
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return err;
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}
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// Add a NUL terminator to make things easier
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(*value)->key = ccalloc(keylen + 1, char);
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memcpy((*value)->key, key, keylen);
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HASH_ADD_KEYPTR(hh, c->entries, (*value)->key, keylen, *value);
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return 1;
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}
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static inline void
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cache_invalidate_impl(struct cache *c, struct cache_handle *e, cache_free_t free_fn) {
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free(e->key);
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HASH_DEL(c->entries, e);
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if (free_fn) {
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free_fn(c, e);
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}
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}
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void cache_invalidate_all(struct cache *c, cache_free_t free_fn) {
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struct cache_handle *e, *tmpe;
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HASH_ITER(hh, c->entries, e, tmpe) {
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cache_invalidate_impl(c, e, free_fn);
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}
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}
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