multithreading - 如何从Erlang中的now()获得微秒

Question

我尝试将相应的线程与时间戳(从现在起的微秒函数)进行匹配，就像jill从john [739000]收到介绍性消息，而john从jill [739000]收到回复消息

if
     I == true ->
         M_pid!{lists:concat([Self_name," received intro message from ", Process_name , "[",erlang:now(),"]"]), self()},
         %io:fwrite(I),
         whereis(Process_name)!{Self_name, "reply",self()},
         friends(Msg, M_pid, State + 1, Self_name);
     R == true ->
         M_pid!{lists:concat([Self_name," received reply message from ", Process_name , "[",pid_to_list(Process_id),"]"]), self()},
         friends(Msg, M_pid, State + 1, Self_name)
 end

我试图将process_id从now()更改为微秒。
我是Erlang的新手。预先谢谢你们!

Answer 1

erlang:now()已过时，不应使用。有两种方法可以获取当前时间(以微秒为单位)

os:timestamp()

{Mega, Sec, Micro} = os:timestamp(),
(Mega * 1000000 + Sec) * 1000000 + Micro.

os:system_time(microseconds)