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Re: pthread_mutexattr_setpshared()

On Sun, Oct 17, 2010 at 05:52:34PM +1300, Mark Davies wrote:
  | On Sunday 17 October 2010 17:06:11 Thor Lancelot Simon wrote:
  | > On Sun, Oct 17, 2010 at 04:16:59PM +1300, Mark Davies wrote:
  | > > The 4.5.2 kdelibs unconditionally tries to call
  | > > pthread_mutexattr_setpshared(), which appears to be in the posix
  | > > standard
  | > 
  | > No.  It's an optional extension.
  | So is there a particular define that the code should be testing for before 
  | assuming the function exists?

I think that you're supposed to be able to use _POSIX_THREAD_PROCESS_SHARED
from <unistd.h> or from the CLI, getconf _POSIX_THREAD_PROCESS_SHARED.

However, certain platforms such as Mac OS X return a value for this
but don't actually implement the feature.

I have some autoconf tests which can detect if PTHREAD_PROCESS_SHARED
is available and functional, if you're interested.


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