free2.c

int compare_ptrs(const void* a, const void* b) {
	hash_bucket_t* x = *(hash_bucket_t**)a;
	hash_bucket_t* y = *(hash_bucket_t**)b;

	ptrdiff_t diff = x - y;
	if (diff)
		return diff > 0 ? 1 : -1;
	return 0;
}

void hash_table_free(hash_ctx_t* ctx) {
	qsort(ctx->dir->buckets, ctx->dir->number_of_buckets, sizeof(hash_bucket_t*), compare_ptrs);
	hash_bucket_t* prev = NULL;
	for (size_t i = 0; i < ctx->dir->number_of_buckets; i++)
	{
		if (prev == ctx->dir->buckets[i]) {
			continue;
		}
		prev = ctx->dir->buckets[i];
		ctx->release_page(ctx->dir->buckets[i]);
	}
	ctx->release_page(ctx->dir);
	ctx->dir = NULL;
}