如何在 Erlang 中从 now() 获取微秒

Question

我尝试将相应的线程与时间戳(从现在开始的微秒函数(相匹配，就像吉尔收到来自约翰 [739000] 的介绍消息，约翰收到吉尔的回复消息 [739000]

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now()从process_id更改为微秒。 我是 Erlang 的新手。提前谢谢你们！

Answer 1

erlang:now()已被弃用，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.

2. os:system_time(microseconds)