The primary signal is desiredSize on the controller. It can be positive (wants data), zero (at capacity), negative (over capacity), or null (closed). Producers are supposed to check this value and stop enqueueing when it's not positive. But there's nothing enforcing this: controller.enqueue() always succeeds, even when desiredSize is deeply negative.
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void heapSort(int arr[], int n) {
这句话被正在拖地的阿爸的生母听到了，后来她辗转多方找到了阿嬷，说孩子身体不好，自己家里穷，上面还有一个女儿，两个儿子，老四（阿爸）怕是没钱养活，乞求她买了这孩子。