Author: Robert Hyatt
Date: 19:20:50 09/25/02
Go up one level in this thread
On September 25, 2002 at 17:52:19, Miguel A. Ballicora wrote:
>On September 25, 2002 at 07:48:12, Vincent Diepeveen wrote:
>
>>Hello,
>>
>>I'm looking to a quick alternative for the windows
>>function WaitForSingleObject();
>
>I think that you are looking for
>pthread_join();
>
>That is what I use and it works exactly the same.
This is bad for several reasons.
1. It only works for posix threads. Vincent is using plain old heavyweight
processes (fork()) and not threads. No way to do the join for forked
processes. It could be done in another way but it would be unbearably slow
because fork() is _really_ expensive while pthread_create is not.
2. This means threads have to exit. It is singificantly more efficient to
use a "thread pool" and start the threads once, rather than stopping/starting
them thousands of times during a search. But again, for Vincent, this is not
an issue.
>
>I use this in windows:
>
>static void engine_thread_wait(void)
>{
> WaitForSingleObject (Engine_ID, INFINITE);
>}
>
>And the equivalent in Linux:
>
>static void engine_thread_wait(void)
>{
> void *p;
> pthread_join (Engine_ID, &p);
>}
>
>Regards,
>Miguel
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