fix(epoll): 修复epoll超时唤醒机制，确保定时器通过Waker唤醒等待队列 #1492
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- 重构定时器创建逻辑，使用EpollTimeoutWaker结构体实现TimerFunction - 将超时唤醒方式从直接唤醒PCB改为通过Waker::wake()触发 Signed-off-by: longjin <longjin@DragonOS.org>
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通过这个PR, DragonOS可以正常的在busybox vi里面从编辑模式按下esc,退出到普通模式。
之前卡死的原因是，busybox vi的
read_key()在读到 ESC(27) 后会用 poll(..., 50ms) 再读几个字节来判断是不是方向键序列；如果 DragonOS 的 poll/epoll_wait 超时不起作用，就会卡在“等后续字节”的状态里，表现为你按了 Esc 但无法进入普通模式、也就打不出:wq