macosx libc::sysconf(84) as usize // result 18446744073709551615

[whispermemory]

|- 1-|
|- 2-| extern crate libc;
|- 3-| fn get_num_cpus() -> usize {
|- 4-| unsafe {
|- 5-| libc::sysconf(84) as usize
|- 6-| }
|- 7-| }
|- 8-|
|- 9-| fn main() {
|-10-| println!("{}", get_num_cpus());//18446744073709551615
|-11-| }

Darwin matoMacBook-Pro.local 13.3.0 Darwin Kernel Version 13.3.0: Tue Jun 3 21:27:35 PDT 2014; root:xnu-2422.110.17~1/RELEASE_X86_64 x86_64

[whispermemory]

seanmonstar/num_cpus#2

[oh-its-jimjam]

84 is only valid for linux and not macos; i've submitted a pull request to fix this so you can reference it as a constant as libc::_SC_NPROCESSORS_ONLN and it will ensure it's the correct value for macos

rust-lang/rust#24376

[alexcrichton]

Closing in favor of rust-lang/rust#24374, but thanks for the report!

[whispermemory]

THANKS