diff options
| -rw-r--r-- | library/std/src/sys/unix/thread.rs | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/library/std/src/sys/unix/thread.rs b/library/std/src/sys/unix/thread.rs index 15070b1f6a7..7307d9b2c86 100644 --- a/library/std/src/sys/unix/thread.rs +++ b/library/std/src/sys/unix/thread.rs @@ -326,6 +326,25 @@ pub fn available_parallelism() -> io::Result<NonZeroUsize> { } else if #[cfg(any(target_os = "freebsd", target_os = "dragonfly", target_os = "netbsd"))] { use crate::ptr; + #[cfg(target_os = "freebsd")] + { + let mut set: libc::cpuset_t = unsafe { mem::zeroed() }; + unsafe { + if libc::cpuset_getaffinity( + libc::CPU_LEVEL_WHICH, + libc::CPU_WHICH_PID, + -1, + mem::size_of::<libc::cpuset_t>(), + &mut set, + ) == 0 { + let count = libc::CPU_COUNT(&set) as usize; + if count > 0 { + return Ok(NonZeroUsize::new_unchecked(count)); + } + } + } + } + let mut cpus: libc::c_uint = 0; let mut cpus_size = crate::mem::size_of_val(&cpus); |