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hashmap: minor hashmap_replace optimization

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When hashmap_replace detects no such key exists yet, it calls hashmap_put that
performs the same check again. Avoid that by splitting the core of hashmap_put
into a separate function.
This commit is contained in:
Michal Schmidt 2014-08-10 23:35:27 +02:00
parent 631b9deefb
commit 923041cb0a
1 changed files with 21 additions and 13 deletions
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34
src/shared/hashmap.c
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@ -488,19 +488,10 @@ static bool resize_buckets(Hashmap *h) {
return true;
}
int hashmap_put(Hashmap *h, const void *key, void *value) {
static int __hashmap_put(Hashmap *h, const void *key, void *value, unsigned hash) {
/* For when we know no such entry exists yet */
struct hashmap_entry *e;
unsigned hash;
assert(h);
hash = bucket_hash(h, key);
e = hash_scan(h, hash, key);
if (e) {
if (e->value == value)
return 0;
return -EEXIST;
}
if (resize_buckets(h))
hash = bucket_hash(h, key);
@ -521,6 +512,23 @@ int hashmap_put(Hashmap *h, const void *key, void *value) {
return 1;
}
int hashmap_put(Hashmap *h, const void *key, void *value) {
struct hashmap_entry *e;
unsigned hash;
assert(h);
hash = bucket_hash(h, key);
e = hash_scan(h, hash, key);
if (e) {
if (e->value == value)
return 0;
return -EEXIST;
}
return __hashmap_put(h, key, value, hash);
}
int hashmap_replace(Hashmap *h, const void *key, void *value) {
struct hashmap_entry *e;
unsigned hash;
@ -535,7 +543,7 @@ int hashmap_replace(Hashmap *h, const void *key, void *value) {
return 0;
}
return hashmap_put(h, key, value);
return __hashmap_put(h, key, value, hash);
}
int hashmap_update(Hashmap *h, const void *key, void *value) {