如何在 Erlang 中从 now() 获得微秒

Question

我尝试将相应的线程与时间戳（从现在开始的微秒函数）匹配，就像 jill 从 john [739000] 收到介绍消息 并且 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

我试图从process_id 更改为从now() 的微秒。 我是 Erlang 的新手。提前谢谢你们！

Answer 1

erlang:now() 已弃用，不应使用。有两个选项可以获取当前时间（以微秒为单位）

1. os:timestamp()

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

1. os:system_time(microseconds)