process sleeps

Raimo Niskanen <>
Tue Apr 25 16:05:28 CEST 2006


 (Yani Dzhurov) writes:

If you read the source code for timer.erl:

  sleep(T) ->
    receive
    after T -> ok
    end.

you will see that timer:sleep(0) will become

  receive after 0 -> ok end.

and that will not even schedule out the current process.
To do that you should use

  erlang:yield().

instead.



> Hi guys,
> 
>  
> 
> I wondered whether timer:sleep(0) would cause a process to sleep or it will
> just pass it ?
> 
> For instance if I have spawned process with fun();
> 
>  
> 
> fun()->
> 
>             bar(),
> 
>             baz(),
> 
>             timer:sleep(0),
> 
>             bar().
> 
> Would the process sleep after baz(), or not ?
> 
>  
> 
> 10x,
> 
>  
> 
> yani
> 
> 

-- 

/ Raimo Niskanen, Erlang/OTP, Ericsson AB



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