| Accusing me of not reading your comment is kind of offensive, and the implication (that I'm only disagreeing because I'm not reading your arguments) is also offensive. Given that POSIX does not define a way to select between fair and unfair locks, having any way to do that is by definition not a standard. Your argument against Apple having a way to get unfair locks is just as much an argument against Linux/Windows having a way of getting fair locks (assuming they even have that! I sure hope they do). And in any case, you don't need to #ifdef all your code everywhere to use os_unfair_lock, you just need to #ifdef a single line where you call pthread_mutexattr_setpolicy_np(). > I get that no-one would ever want to change an implemented default behavior in their OS, but that doesn't make the situation any better. I recognize that having different behaviors on different OSes is suboptimal. The problem is you continue to imply that macOS's behavior is wrong, with the only justification being that Linux and Windows both behave differently. And I do not accept that argument. I'm also not convinced that this is really a big problem anyway. Fairness in locks is probably a little more important on Apple platforms than other platforms because of the QoS system. If you have an unfair lock that both the main thread and a "utility" thread use all the time, the utility thread will probably get starved since the main thread has a much higher QoS. So it's good that Apple platforms default to fair locks, because thread starvation is pretty bad. Personally, I think Linux and Windows platforms should default to fair locks too, with unfair-but-fast being opt-in, but that's an argument I've already made. > but you might consider not ignoring valid arguments Once again you are being offensive. > Aggressively misinterpreting statements can be, though. And even more offensive. Seriously, if this is how you're going to argue, I don't see much point in continuing. You're providing fairly weak arguments in favor of all platforms should be the same, without recognizing that the platforms may have reasons for behaving differently, and constantly trying to imply that Apple platforms should be the ones to change while providing literally no reason whatsoever why that change should happen instead of Linux/Windows changing. This is not a compelling argument. And you keep insulting me at the same time, and I genuinely don't understand why you think that's going to change my mind. |
Seems like we get the same vibes from each other; I have to point out though that I'm actually trying to be civil here. I honestly can't see where you are getting various of your implications from - I can't agree with half of what you state I'm implying here. Intended offensive statements would look different than that one.
So be it - we most likely both have more productive things to do. Maybe we'll have a more constructive discussion on something else someday.