Trying to join an already exited pthread

[youshi10 at u.washington.edu]

On Fri, 9 Feb 2007, Daniel Eischen wrote:

> On Thu, 8 Feb 2007, Garrett Cooper wrote:
>> 
>> Actually, now that I think about it the calls I made with ps in the program 
>> are valid for Linux but not for FreeBSD (they're for getting thread 
>> listings). Hence error code 2.
>> 
>> From intro(2):
>> 
>>     2 ENOENT No such file or directory.  A component of a specified pathname 
>> did not exist, or
>> 					  the pathname was an empty
>> 					  string.
>> 
>> Didn't think that a bad command would return errno=2 though..
>
> And hopefully you've realized that your code is totally bogus
> since pthread_foo() don't set errno.  All the pthread_foo()
> functions _return_ the error.  If your code is not checking
> the return values from those functions, it is wrong on every
> platform, not just FreeBSD.
>
> -- 
> DE

Well, right. I was just being lazy by checking errno, instead of checking the return value of pthread_*. It wasn't meant to be anything more than a simple set of tests. I thought that errno was set on errors though, but after reading the manpage more carefully it turns out that this is not the case.

I'll see if I can fix my checks.

Thanks for bringing this to my attention!

-Garrett