John Polstra <[EMAIL PROTECTED]> writes:
> In article <[EMAIL PROTECTED]>,
> Mike Barcroft <[EMAIL PROTECTED]> wrote:
> > John Polstra <[EMAIL PROTECTED]> writes:
> > > FreeBSD violates POSIX in this respect. The 1003.1 standard
> > > (section 2.5) requires pthread_t to be an arithmetic type.
> >
> > It looks like this requirement was removed in POSIX.1-2001.
>
> Interesting. I don't have that standard and wasn't aware of the
> change. Are you sure the requirement was removed? It was hidden
> away in an obscure place in the 1996 edition of the standard.
> There's a table of "Primitive System Data Types" containing the
> usual suspects (dev_t, gid_t, uid_t, ...) and including the thread
> types I mentioned. Then there's a sentence in the nearby text that
> says, "All of the types listed in Table 2-1 shall be arithmetic
> types ..."
Here's the text:
: 12974 All of the types shall be defined as arithmetic types of an
appropriate length, with the following
: 12975 exceptions:
: 12976 XSI key_t
: 12977 THR pthread_attr_t
: 12978 BAR pthread_barrier_t
: 12979 pthread_barrierattr_t
: 12980 THR pthread_cond_t
: 12981 pthread_condattr_t
: 12982 pthread_key_t
: 12983 pthread_mutex_t
: 12984 pthread_mutexattr_t
: 12985 pthread_once_t
: 12986 pthread_rwlock_t
: 12987 pthread_rwlockattr_t
: 12988 SPI pthread_spinlock_t
: 12989 TRC trace_attr_t
: 12990 trace_event_id_t
: 12991 TRC TEF trace_event_set_t
: 12992 TRC trace_id_t
So it looks like pthread_t must be an arithmetic type, but not the
others. My mistake.
It goes on to say:
: 13010 There are no defined comparison or assignment operators for
the following types:
: 13011 THR pthread_attr_t
: 13012 BAR pthread_barrier_t
: 13013 pthread_barrierattr_t
: 13014 THR pthread_cond_t
: 13015 pthread_condattr_t
: 13016 pthread_mutex_t
: 13017 pthread_mutexattr_t
: 13018 pthread_rwlock_t
: 13019 pthread_rwlockattr_t
: 13020 SPI pthread_spinlock_t
: 13021 TRC trace_attr_t
Again pthread_t isn't listed.
Best regards,
Mike Barcroft
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