Android Power Management: Wake Lock

http://blog.csdn.net/hzdysymbol/archive/2009/03/19/4004791.aspx
http://letsgoustc.spaces.live.com/blog/cns!89AD27DFB5E249BA!526.entry

in /sys/power/ there are 3 files: "state, wake_lock, wake_unlock"

The wake_lock is for partial wakelock mechanism. You can do:

$ echo mylock > /sys/power/wake_lock

The system will check this, and won't go in to real suspend.

To unlock, just echo the same name to "wake_unlock"

$ echo mylock > /sys/power/wake_unlock