[erlang-questions] Re: erl startup
Wed Jun 2 02:37:36 CEST 2010
On 02/06/10 08:43, Wes James wrote:
>> wait_for_exit() ->
>> some_exit_signal -> ok;
>> _ -> wait_for_exit()
> If I do this
> module:wait_for_exit() ! some_exit_signal.
> It just hangs. I have to hit ctrl-c to kill it. Isn't it supposed to
> exit wait_for_exit() after that?
...No? What you're asking it to do there is to send the message
'some_exit_signal' to the process returned by the call
module:wait_for_exit(). That function doesn't return a process -
indeed, its whole point is to /not return at all/ until it receives that
You need to get the PID of the process that's running (the value
returned by start()) and send the signal to that. ie:
1> Pid = module:start().
2> Pid ! some_exit_signal.
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