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網絡子係統83_inet協議族-SOCK_RAW(四)

//	raw sock數據就緒函數
//		raw sock在raw_recvmsg中阻塞,在raw_local_deliver通過sock->sk_data_ready通知輸入數據就緒
//	步驟:
//		1.過濾感興趣的事件
//		2.喚醒阻塞進程,並將進程從wq上取下
1.1 static int receiver_wake_function(wait_queue_t *wait, unsigned int mode, int sync,
				  void *key)
{
	unsigned long bits = (unsigned long)key;

	//POLLIN輸入數據就緒
	//POLLER輸出數據就緒
	if (bits && !(bits & (POLLIN | POLLERR)))
		return 0;
	//喚醒阻塞進程,並將進程從wq上取下
	return autoremove_wake_function(wait, mode, sync, key);
}

//	喚醒阻塞進程,並將進程從wq上取下
1.2 int autoremove_wake_function(wait_queue_t *wait, unsigned mode, int sync, void *key)
{
	int ret = default_wake_function(wait, mode, sync, key);

	if (ret)
		list_del_init(&wait->task_list);
	return ret;
}

最後更新:2017-04-03 12:55:18

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