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thread-safe functions in fchash.c

This commit is contained in:
Akira TAGOH 2017-11-24 10:53:39 +05:30
parent 4758144492
commit 1b2279d6b5
1 changed files with 4 additions and 2 deletions
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6
src/fchash.c
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@ -169,13 +169,15 @@ FcHashTableAdd (FcHashTable *table,
return !ret; return !ret;
} }
retry:
for (prev = &table->buckets[hash % FC_HASH_SIZE]; for (prev = &table->buckets[hash % FC_HASH_SIZE];
(b = *prev); prev = &(b->next)) (b = fc_atomic_ptr_get (prev)); prev = &(b->next))
{ {
if (!table->compare_func (bucket->key, key)) if (!table->compare_func (bucket->key, key))
goto destroy; goto destroy;
} }
*prev = bucket; if (!fc_atomic_ptr_cmpexch (prev, b, bucket))
goto retry;
return FcTrue; return FcTrue;
} }