Hashtable free keys

[xfilesee]

• In configuration a free function specifically to free keys in hashtable_remove and hashtable_destroy cases can be added. In current configuration the keys are left in heap if they were dynamically allocated.

[srdja]

Hey, thanks for opening an issue :-)

If I understand you correctly, you're saying that there should be a pointer to a free function kept in the hashtable structure that would be used to automatically free data when it's removed from the table?

If that's the case, I think it is probably a good idea to add an option for that. Although I think it might be better to do it with a callback function instead of adding another field to the structure. You might want to take a look at this related issue.

[xfilesee]

Thanks for the answer.
I needed a solution immediately so I added 2 function pointers to both struct hashtable_s and hashtable_conf_s:
table->key_free
table->value_free
By default NULL is assigned to both of these functions (to match the current configuration) and before calling I always check to make sure they are not NULL: like in hashtable_remove function:
if(table->key_free != NULL)
table->key_free(key);