a CAS to push entries onto the free list is worth experimenting with.
Instead, it focuses on explicit boundaries, predictable behavior,
，更多细节参见搜狗输入法2026
依照前款规定由一名人民警察进行询问、扣押、辨认、调解的，应当全程同步录音录像。未按规定全程同步录音录像或者录音录像资料损毁、丢失的，相关证据不能作为处罚的根据。
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.