Re: How to build OpenPegasus SDK as single threaded?

On HP UX we cannot mix single threaded libraries with, multi-threaded ones.
It might cause undefined behaviour.
And, if an application links to multi-threaded library directly or
indirectly, it has to be built with multi-threading (-mt option) enabled.
As I am not using multi threaded piece of code from pegcommon(src/Common),
I am expecting it to be disabled. Why unnecessarily create a dependency on
pthread library? I believe it is good to have a flag in configure files
 for enabling/disabling the multi-threading.


On 6 April 2012 22:00, Kirk Augustin <[email protected]> wrote:

> But if you turned off multi threading in Pegasus, you would create and
> ensure the very condition you are concerned about avoiding.
> You would cause a single threaded library to be linked with multi threaded
> ones.
> The only safe solution is to make sure Pegasus is multi treaded, so that
> you avoid the possibility of a single threaded library being linked to a
> multi threaded one.
> There is no risk in a multi threaded library linking to a single threaded
> one because a single threaded library gets multiple copies.
> Only the other way around is risky.
> There is only one copy of a multi threaded library, and you do not want
> single threaded libraries linking because then more than one could end up
> linking at the same time.
>
> Kirk  Augustin
> 11821 NW McNamee Rd
> Portland, OR 97231
>
> HM: 503-289-4356
>
>   ------------------------------
> *From:* Pranav S <[email protected]>
> *To:* Devchandra Leishangthem <[email protected]>
> *Cc:* [email protected]
> *Sent:* Friday, April 6, 2012 4:38 AM
> *Subject:* Re: How to build OpenPegasus SDK as single threaded?
>
> I some where read, on HPUX and AIX linking single threaded libraries to
> multi threaded causes undefined behaviour. Hence I was trying to to build
> openpegasus libs as single threaded. I see libpegcommon uses pthread
> library. I would like to know if there is way to turnoff the
> multithreading. In HPUX Makefiles I see "-mt" option being used to enable
> threads support.
>
> I see Pegasus/Common has thread pool implementation, which is not always
> being used by the applications consuming OenPegasus SDK.
> Let me know if I am wrong somewhere.
>
> Thank You,
> Pranav
>
> On 6 April 2012 16:22, Devchandra Leishangthem <[email protected]>wrote:
>
> Is there any specifi reason why you wanted to build uni-threaded?
> Warm Regards
> D>L> Meetei
> IBM India System and Technology Lab
> EGL -D,Bangalore, India
>
>
>
> From:   Pranav S <[email protected]>
> To:     [email protected],
> Date:   04/06/2012 04:06 PM
> Subject:        How to build OpenPegasus SDK as single threaded?
>
>
>
> Hello,
>
> I am trying to explore OpenPegasus SDK and its applications. Currently the
> SDK uses multi threading and links to pthreads library, hence it gets built
> as a multithreaded. I would like to know is it possible to build the
> library as single threaded? Do we have provision for that in the Makefiles.
> I tried exploring but did not find anything which tells that it is possible
> to build the library as single threaded one. Because linking a single
> threaded library to a multithreaded library can lead to undefined
> behaviour.
>
> --
> Thanks,
> Pranav
>
>
>
>
>
> --
> Thanks,
> Pranav
>
>
>
>


-- 
Thanks,
Pranav