[ThreadStatic]
private static Foo _foo;
public static Foo CurrentFoo {
get {
if (_foo == null) {
_foo = new Foo();
}
return _foo;
}
}
Is the previous code thread safe? Or do we need to lock the method?
views:
221answers:
2
+5
A:
If its ThreadStatic there's one copy per thread. So, by definition, its thread safe.
Will
2009-07-06 15:30:36
That's where my example comes from. I'm just trying to figure out if it's possible for one thread to get _foo == null but then a thread switch occurs and another threads _foo gets new'ed up even though it isn't null?
ShaneC
2009-07-06 16:16:09
Nope. One _foo per thread, so context switches have no impact.
Will
2009-07-06 17:16:38
A:
A [ThreadStatic] is compiler/language magic for thread local storage. In other words, it is bound to the thread, so even if there is a context switch it doesn't matter because no other thread can access it directly.
MSN
2009-07-06 16:46:02