cradle_power_nb.notifier_call =解释这段代码的作用 cradle_power_change_event; power_in_register_notifier(&cradle_power_nb, 1);
时间: 2023-12-19 09:04:39 浏览: 25
cradle_power_nb.notifier_call is a function pointer that is used to register a callback function to be called when the power status of a cradle changes. The cradle_power_change_event is the event that triggers the callback function. The power_in_register_notifier is a function that registers the callback function with the power management system. When the power status of the cradle changes, the registered callback function will be called to handle the event.
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解释这段代码的作用cradle_power_nb.notifier_call = cradle_power_change_event; power_in_register_notifier(&cradle_power_nb, 1);
这段代码的作用是将名为"cradle_power_nb"的notifier结构体的回调函数设置为"cradle_power_change_event",然后将该notifier注册到"power_in_register_notifier"函数中,以便在电源状态变化时调用该回调函数。具体来说,当电源状态变化时,会调用"power_in_register_notifier"函数,并传递该notifier作为参数,以便该函数可以在适当的时间调用"cradle_power_change_event"函数。
解释下面的代码cradle_power_nb.notifier_call = cradle_power_change_event; power_in_register_notifier(&cradle_power_nb, 1);
这段代码定义了一个名为cradle_power_nb的变量,并将其notifier_call属性设置为cradle_power_change_event。同时,还调用了power_in_register_notifier函数,将cradle_power_nb作为参数传递给该函数。
具体来说,这段代码用于注册一个名为cradle_power_nb的通知对象,以便在电源状态发生变化时能够通知相关的事件。notifier_call属性指定了当通知对象被触发时需要执行的回调函数,即cradle_power_change_event。而power_in_register_notifier函数则将该通知对象注册到电源管理系统中,以便在需要时能够触发相应的事件。