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Added API to initialize dictionary iterators without memory allocation (#11245)

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* Added api to use dictionary iterators without calling malloc.
This commit is contained in:
tmoshaiov 2022-09-08 04:57:43 +03:00 committed by GitHub
parent c0ce97facc
commit fb1d56bc2a
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GPG Key ID: 4AEE18F83AFDEB23
2 changed files with 27 additions and 9 deletions
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33
src/dict.c
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@ -572,16 +572,36 @@ unsigned long long dictFingerprint(dict *d) {
return hash;
}
dictIterator *dictGetIterator(dict *d)
void dictInitIterator(dictIterator *iter, dict *d)
{
dictIterator *iter = zmalloc(sizeof(*iter));
iter->d = d;
iter->table = 0;
iter->index = -1;
iter->safe = 0;
iter->entry = NULL;
iter->nextEntry = NULL;
}
void dictInitSafeIterator(dictIterator *iter, dict *d)
{
dictInitIterator(iter, d);
iter->safe = 1;
}
void dictResetIterator(dictIterator *iter)
{
if (!(iter->index == -1 && iter->table == 0)) {
if (iter->safe)
dictResumeRehashing(iter->d);
else
assert(iter->fingerprint == dictFingerprint(iter->d));
}
}
dictIterator *dictGetIterator(dict *d)
{
dictIterator *iter = zmalloc(sizeof(*iter));
dictInitIterator(iter, d);
return iter;
}
@ -627,12 +647,7 @@ dictEntry *dictNext(dictIterator *iter)
void dictReleaseIterator(dictIterator *iter)
{
if (!(iter->index == -1 && iter->table == 0)) {
if (iter->safe)
dictResumeRehashing(iter->d);
else
assert(iter->fingerprint == dictFingerprint(iter->d));
}
dictResetIterator(iter);
zfree(iter);
}

3
src/dict.h
View File

@ -187,6 +187,9 @@ void *dictFetchValue(dict *d, const void *key);
int dictResize(dict *d);
dictIterator *dictGetIterator(dict *d);
dictIterator *dictGetSafeIterator(dict *d);
void dictInitIterator(dictIterator *iter, dict *d);
void dictInitSafeIterator(dictIterator *iter, dict *d);
void dictResetIterator(dictIterator *iter);
dictEntry *dictNext(dictIterator *iter);
void dictReleaseIterator(dictIterator *iter);
dictEntry *dictGetRandomKey(dict *d);