[boost] Re: thread lib: solaris problems.

From: John Maddock (John_Maddock_at_[hidden])
Date: 2001-10-30 07:34:56

>Sorry, I must be dense.  Both issues?  I see two issues below: 
>pthread_cond_wait() returning 0 instead of an error for timeout and 
>pthread_equal() not working.  If -mt fixes both of these then what 
>exactly is asserting?

OK, with sunpro, you see the failed assertion (and you have to use -mt
otherwise the thread lib doesn't compile).

With gcc there is a -pthreads option, but I see std lib related linker
errors if I use this (there appear to be no std exception classes???).

If I use:

g++ -I../../ sources -lrt

Then I see the errors I reported, but with:

g++ -I../../ src/*.cpp test/*.cpp -lrt -lpthread

Then I see the same behaviour as with sunpro.  Looks like the runtime has a
stub non-functioning pthreads lib in it, and you need to link to the real
-lpthread to get the correct behaviour.

The cause is the same  - you are waiting on a condition variable when there
is only one thread - the thread scheduler knows that the condition can
never be signalled, and so gives up.

- John Maddock
http://ourworld.compuserve.com/homepages/john_maddock/