creating pthreads runtime

[Neel]

Hi,
I 'm facing some prob with creating pthreads.
My requirement is to create threads in a loop.
but I dont want to make an array of pthread.

At anytime I want to have 5 threads (I used a global variable as a
counter).
Whenever the counter is less than 5, I want to create new thread.

whenever any thread is about to terminate, I will decrement the
counter. (of course avoiding race conditions using mutex lock).

But 'm confused how to create thread at run time.

I tried something like


pthread_mutex_l ock(&check_thre ad_count);

if(threadCounte r<5){
pthread_create( new pthread(), NULL, handleConnectio n, NULL);
}

pthread_mutex_u nlock(&check_th read_count);

using *new pthread()* is not correct.

So how can I create pthread at run time?

[Neel]

Re: creating pthreads runtime

sorry friends,
I made syntax error there...
I got the solution..
It should be

new pthread_t()

i missed "_t"

Happy Programming :)

[CBFalconer]

Re: creating pthreads runtime

Neel wrote:

>
I'm facing some prob with creating pthreads.
My requirement is to create threads in a loop.
but I dont want to make an array of pthread.
>

.... snip ...

>
using *new pthread()* is not correct.
>
So how can I create pthread at run time?

There are no pthreads in the C language. Thus this is off-topic.

--
[mail]: Chuck F (cbfalconer at maineline dot net)
[page]: <http://cbfalconer.home .att.net>
Try the download section.

[Keith Thompson]

Re: creating pthreads runtime

Neel <a.k.vora@gmail .comwrites:

I 'm facing some prob with creating pthreads.

[...]

Try asking in comp.programmin g.threads.

--
Keith Thompson (The_Other_Keit h) kst-u@mib.org <http://www.ghoti.net/~kst>
Nokia
"We must do something. This is something. Therefore, we must do this."
-- Antony Jay and Jonathan Lynn, "Yes Minister"

[Antoninus Twink]

Re: creating pthreads runtime

On 23 Sep 2008 at 2:32, Neel wrote:

On On 23 Sep 2008 at 2:02, Neel wrote:

if(threadCounte r<5){
pthread_create( new pthread(), NULL, handleConnectio n, NULL);
}

>
I got the solution..
It should be
>
new pthread_t()
>
i missed "_t"

This is a recipe for a memory leak. As you never keep track of the
pthread_t * you get from new (an operator which incidentally is only
available in C++, not in vanilla C), you'll have no way of freeing the
memory with delete once the thread exits.

You should either have a pthread_t variable and pass its address to
pthread_create( ), or else keep a record of the pointer from new,
use pthread_join() somewhere appropriate and make sure to delete/free()
the memory used by the pthread_t structure.