Semaphore is initialized withusize permits but you can only acquire u32 permits.

[nhtyy]

Im wondering if this is something the Tokio team has considered or has an explantation for, as I think it would be useful to be allowed to attempt to acquire up to usize permits.

For instance if the semaphore represents the total RAM on a machine, then you can only acquire up to ~4Gb at a time. I dont really see an explnation in the code for this and I notice that the ll::semaphore internally accepts usize args.

[Darksonn]

See #4446

[nhtyy]

Nice thanks!