On Sun, 18 Dec 2011 11:55:10 -0000, Michel Fortin
<[email protected]> wrote:
On 2011-12-18 04:35:08 +0000, Jonathan M Davis <[email protected]>
said:
On Saturday, December 17, 2011 22:16:38 Michel Fortin wrote:
Shouldn't a properly implemented double-checked locking pattern be part
of the standard library? This way people will have a better chance of
not screwing up. I think the pattern is common enough to warrant it.
Well, from the sounds of it, the basic double-checked locking pattern
would
work just fine with a shared variable if shared were fully implemented,
but
since it's not, it doesn't work right now. So, I don't know that we
need to do
anything other than finish implementing shared.
I meant something higher level so you don't even have to think about
double-checked locking. Something like this:
AssignOnce!(shared MyClass) c;
c = { new shared MyClass }; // the delegate literal is called only the
first time
c.blahblah(); // c is guarantied to be initialized at this point
...or something similar.
Something like..
http://linux.die.net/man/3/pthread_once
I wrote a windows version of that once (pun intended), and I *think* it
works .. after reading Andrei's link I'm not so sure..
R
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