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thread: implements available_concurrency on haiku

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This commit is contained in:
David Carlier 2021-09-27 18:51:52 +01:00
parent 2b6ed3b675
commit 5d4048b66f
1 changed files with 10 additions and 1 deletions
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11
library/std/src/sys/unix/thread.rs
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@ -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"))
}
}