Re: [Boost-users] passing variables into thread

Subject: Re: [Boost-users] passing variables into thread
From: Alexander Carôt (alexander_carot_at_[hidden])
Date: 2016-09-03 06:07:57

Hello Juan,

 

thanks a lot - this looks very promising ! I will figure it out as soon as possible.

 

Best

 

Alex
 

--
http://www.carot.de
Email : [e-mail]
Tel.: [phone]

 
 
Gesendet: Samstag, 03. September 2016 um 07:10 Uhr
Von: "Juan Ramírez" <[e-mail]>
An: [e-mail]
Betreff: Re: [Boost-users] passing variables into thread

I think what you want may be called an 'Event us'.
 

You have a queue (Bus) of elements of type Event (Event is the type you define to contain the data).

The thread is locked in the call to 'pop()'

Anytime you want to send more data you just push a new element into the queue

The thread gets unlocked and gets the new data

 

Of course you may want to try another if more than one thread are allowed to handle the same event, but that won't be difficult if the first steps are understood.

 

I invite you to take a look to this for an implementation of a thread-safe queue

 

Pseudo-code:

 

 

void thread_handler() {

    while (true) {

        Event e = queue_.pop();

        // do somehting with e

    }

}

 

void trigger() {

    Event e (data1, data2, data3)

   queue_.push(e);

}

 

 
On Fri, Sep 2, 2016 at 5:30 PM, Alexander Carôt <[e-mail]> wrote:

> Hello all,
>
> I have a thrad function like:
>
> void sj::eventTrigger(){
>     boost::mutex::scoped_lock lock(eventTriggerMutex);
>
>     while (eventTriggerActive){
>         dFC->eventTriggerLock.wait(lock);
>
>         /// do something with pointer-variable
>
>     }
> }
>
> This function is executed by a eventTriggerLock.notify_all() – call from other objects and when I need to pass certain variables into the thread I have been unsing a global pointer variable.
>
> Now my question:
>
> I wonder if there is a way to get rid of the pointer variable and directly pass variables into the thread such as:
>
> eventTriggerLock.notify_all(data1)
>
> void sj::eventTrigger(int data1){
>     boost::mutex::scoped_lock lock(eventTriggerMutex);
>
>     while (eventTriggerActive){
>         dFC->eventTriggerLock.wait(lock);
>
>         /// do something with data1
>
>     }
> }
>
> Any hint welcome – thanks in advance
>
> Alex
>
>
>
> _______________________________________________
> Boost-users mailing list
> [e-mail]
> http://lists.boost.org/mailman/listinfo.cgi/boost-users
 

 
--

Juan

:wq

 
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