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thread: implements available_concurrency on haiku #89306

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Merged
merged 1 commit into from
Oct 1, 2021
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thread: implements available_concurrency on haiku #89306

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11 changes: 10 additions & 1 deletion library/std/src/sys/unix/thread.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -338,8 +338,17 @@ 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);

if res != libc::B_OK {
return Err(io::Error::last_os_error());
}

Ok(unsafe { NonZeroUsize::new_unchecked(sinfo.cpu_count as usize) })
} else {
// FIXME: implement on vxWorks, Redox, Haiku, l4re
// 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"))
}
}
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