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haiku thread affinity build fix

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This commit is contained in:
David Carlier 2021-10-02 12:40:25 +01:00
parent a8387aef8c
commit 98dde56eb1
1 changed files with 10 additions and 6 deletions
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16
library/std/src/sys/unix/thread.rs
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@ -339,14 +339,18 @@ pub fn available_concurrency() -> io::Result<NonZeroUsize> {
Ok(unsafe { NonZeroUsize::new_unchecked(cpus as usize) })
} else if #[cfg(target_os = "haiku")] {
let mut sinfo: libc::system_info = crate::mem::zeroed();
let res = libc::get_system_info(&mut sinfo);
// system_info cpu_count field gets the static data set at boot time with `smp_set_num_cpus`
// `get_system_info` calls then `smp_get_num_cpus`
unsafe {
let mut sinfo: libc::system_info = crate::mem::zeroed();
let res = libc::get_system_info(&mut sinfo);
if res != libc::B_OK {
return Err(io::Error::last_os_error());
if res != libc::B_OK {
return Err(io::Error::new_const(io::ErrorKind::NotFound, &"The number of hardware threads is not known for the target platform"));
}
Ok(NonZeroUsize::new_unchecked(sinfo.cpu_count as usize))
}
Ok(unsafe { NonZeroUsize::new_unchecked(sinfo.cpu_count as usize) })
} else {
// FIXME: implement on vxWorks, Redox, l4re
Err(io::Error::new_const(io::ErrorKind::Unsupported, &"Getting the number of hardware threads is not supported on the target platform"))