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hashlib: don't build an unused hash for expired value in do_insert

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This commit is contained in:
Emil J. Tywoniak 2025-09-04 14:47:45 +02:00
parent cec48c6abd
commit ccf140f2ef
1 changed files with 3 additions and 7 deletions
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10
kernel/hashlib.h
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@ -509,12 +509,11 @@ class dict {
return do_lookup_internal(key, hash);
}
int do_insert(const K &key, Hasher::hash_t &hash)
int do_insert(const K &key, const Hasher::hash_t &hash)
{
if (hashtable.empty()) {
entries.emplace_back(std::pair<K, T>(key, T()), -1);
do_rehash();
hash = do_hash(key);
} else {
entries.emplace_back(std::pair<K, T>(key, T()), hashtable[hash]);
hashtable[hash] = entries.size() - 1;
@ -522,12 +521,11 @@ class dict {
return entries.size() - 1;
}
int do_insert(const std::pair<K, T> &value, Hasher::hash_t &hash)
int do_insert(const std::pair<K, T> &value, const Hasher::hash_t &hash)
{
if (hashtable.empty()) {
entries.emplace_back(value, -1);
do_rehash();
hash = do_hash(value.first);
} else {
entries.emplace_back(value, hashtable[hash]);
hashtable[hash] = entries.size() - 1;
@ -535,13 +533,11 @@ class dict {
return entries.size() - 1;
}
int do_insert(std::pair<K, T> &&rvalue, Hasher::hash_t &hash)
int do_insert(std::pair<K, T> &&rvalue, const Hasher::hash_t &hash)
{
if (hashtable.empty()) {
auto key = rvalue.first;
entries.emplace_back(std::forward<std::pair<K, T>>(rvalue), -1);
do_rehash();
hash = do_hash(key);
} else {
entries.emplace_back(std::forward<std::pair<K, T>>(rvalue), hashtable[hash]);
hashtable[hash] = entries.size() - 1;