From: Robert Ramey (ramey_at_[hidden])
Date: 2007-08-24 17:56:16
Robert Ramey wrote:
> I'm going through the documentation and now have some questions.
> I would hope that the documentation could be expanded to
> include answers to these questions.
>
> a) reference is made to a "lease" which sounds like a mutex
> to me. But its not obvious to me how this should be used.
> How does the compare with the pattern that I am more
> familiar with
>
> class s : singlton
> mutex m_mutex
> ...
>
> my_function(...){
> scoped_lock(m_mutex);
> ...
> }
>
> OK - I've looked again and I think its clear to me how this
> is to be used.
>
> We need a tutorial here !!!!
>
> b) reference is made to boost::restricted which I couldn't
> find anywhere.
c) the synopsis specifies
static unspecified instance;
But the Expression Symatics specifies D::instance->m which seems
inconsistent to me. I Rather expect the synopsis to say
D:instance.m
or
D::get_instance().m
d) what about access to object which don't require thread locking - for
example
const members. Do they need locking/leasing also? I would guess not but?
e) What does D::instance return ? a reference or pointer to the single
instance of D
or something else. I would expect the former, but the synopsis contains
static "unspecified" instance
rather than
static T instance as I would expect.
f) can "const" static objects be created?
g) what happens if same interface used by different DLLS. Is one instance
still created?
Robert Ramey
Robert Ramey