Linux extraction locks and beacons are often used

1. Signal (synchronization between the two processes)struct semaphore Power_sem; Sema_init (&pdata->power_sem,1); down (&pdata->power_sem); up (&pdata->power_sem);

2. Mutually exclusive amount

struct mutex Led_mutex; Mutex_init (&led_mutex); Mutex_lock (&led_mutex); while (t--);//For delay Mutex_unlock (&led_mutex); Mutex_destroy (&led_mutex);
3.wakup Lock:static struct Wake_lock ec43_wlock; Wake_lock_init (&ec43_wlock, Wake_lock_suspend, "Ec43_wakelock"); wake_lock_timeout (&ec43_wlock, Msecs_to_jiffies (10*1000)); //equals above Wake_lock_timeout (&ec43_wlock, 10*hz); Wake_lock_destroy (&ec43_wlock);

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Linux extraction locks and beacons are often used