Re: [boost] Mutex vs Semaphore

Subject: Re: [boost] Mutex vs Semaphore
From: Jean-Sebastien Stoezel (js.stoezel_at_[hidden])
Date: 2009-04-02 22:57:21

Thanks for the quick reply. Using conditon variables sounds quite  
heavy. You need to instantiate a mutex, a condition variable and a  
flag...
Would there be anything wrong with instantiating a semaphore from the  
interprocess library to provide inter-thread synchronization? By the  
way, why isn't there any semaphore available in the thread library?

Jean

On 2-Apr-09, at 9:25 PM, Sohail Somani wrote:

> Jean-Sebastien Stoezel wrote:
>> Hi,
>>
>> I need to synchronize 2 threads, that is once one is done doing
>> something, it should activate another thread that had been waiting  
>> in a
>> pending state.
>> I see the thread library offers mutexes and nothing else. I guess
>> mutexes would do, but I do not believe I should use mutexes for my
>> application. Mutexes are supposed to provide mutual exclusion when
>> critical data is accessed. Semaphores should be used for what I  
>> want to do.
>
> You can use condition variables for signalling:
>
> http://www.boost.org/doc/libs/1_38_0/doc/html/thread/synchronization.html#thread.synchronization.condvar_ref
>
> -- 
> Sohail Somani
> http://uint32t.blogspot.com
>
> _______________________________________________
> Unsubscribe & other changes: http://lists.boost.org/mailman/listinfo.cgi/boost