Re: [boost] Re: no semaphores in boost::thread

From: Stefan Seefeld (seefeld_at_[hidden])
Date: 2003-06-04 10:52:53

Alexander Terekhov wrote:
> Stefan Seefeld wrote:
> 
>>hi there,
>>
>>I'v been trying to find some info as to why semaphores
>>are considered harmful by the boost::thread authors,
>>without luck. Is there any concise text describing
>>the problem ?
> 
> 
> Well,
> 
> http://www.boost.org/libs/thread/doc/faq.html#question10

well, that doesn't say anything but that it is error-prone.
All I'm trying to find out is: why ?

>>I'v been using semaphores for years and can't think of
>>what should be wrong with it.
> 
> 
> http://google.com/groups?threadm=3CEB6073.ACBCFD17%40web.de
> http://google.com/groups?threadm=c29b5e33.0202011147.98b216e%40posting.google.com

I'm still not convinced. You are comparing semaphores with
mutexes, when you should compare semaphores with condition variables.
At least when argueing about efficiency.

Regards,
                Stefan