topic Re: pthread_create in Operating System - Linux

pthread_create

subrat chaudhary — Thu, 30 Aug 2007 02:41:22 GMT

Hi All,

My application fails because pthread_create is failing with a return value 22.

Can any one help me for same...

Thanks in Advance.

Regards,
Subrat

Re: pthread_create

Dennis Handly — Thu, 30 Aug 2007 03:12:01 GMT

Have you linked with -lpthread? And made sure there are NO -lc on the driver link line?

Re: pthread_create

AwadheshPandey — Thu, 30 Aug 2007 04:00:45 GMT

calls to shl_load(3x) fail with errno 22 (invalid argument) because the pthread_mutex_lock stub returns zero
http://docs.hp.com/en/1896/pthreads.html

Re: pthread_create

subrat chaudhary — Thu, 30 Aug 2007 04:45:28 GMT

Hi Dennis,

I am using -lpthread and not -lc for link.
my appliction is not stop in first time.some time after error is comming and its stop.

Hi Awadhes,

I can't understand what you said exectly about pthread_mutex_lock stub returns zero .
Please explain.

Thanks

Regards,
Subrat

Re: pthread_create

Dennis Handly — Sat, 28 Sep 2013 21:49:50 GMT

>I am using -lpthread and not -lc for link.

You need to make sure that none of the shlibs you use are linked with -lc either. Try ldd on your application.

>I can't understand what you said exactly about pthread_mutex_lock stub returns zero.

He means if you have your shlibs in the wrong order, you're hosed. See the link Awadhesh mentions.

Hmm, this may be all wrong. That errno 22 is related to shl_load.

If you are calling pthead_create and you have the wrong order, you get ENOSYS, 251.

Basically you get 22, EINVAL, by:
invalid thread attributes
The value specified by thread is invalid.
The scheduling policy or scheduling attributes

You need to look at your parms closely. Try replacing your attributes by NULL and check again.