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Linux 设备驱动--- 阻塞型字符设备驱动 --- O_NONBLOCK --- 非阻塞标志【转】

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Linux设备驱动中的阻塞与非阻塞I/O

Linux设备驱动中的阻塞与非阻塞I/O 阻塞与非阻塞I/O 阻塞操作是指在执行设备操作时若不能获得资源则挂起进程，直到满足可操作的条件后再进行操作。因为阻塞的进程会进入休眠状态，因此，必须确保有一个地方能够唤醒休眠的进程。唤醒进程的地方最大可能发生在中断里面，因为硬件资源获得的同时往往伴随着一个...

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更新时间 2022-08-31 15:24:46

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