Move `available_concurrency` implementation to `sys`

1 files changed, 8 insertions, 0 deletions

diff --git a/library/std/src/sys/sgx/thread.rs b/library/std/src/sys/sgx/thread.rs
index 67e2e8b59d3..b82ae86521a 100644
--- a/library/std/src/sys/sgx/thread.rs
+++ b/library/std/src/sys/sgx/thread.rs
@@ -1,6 +1,7 @@
 #![cfg_attr(test, allow(dead_code))] // why is this necessary?
 use crate::ffi::CStr;
 use crate::io;
+use crate::num::NonZeroUsize;
 use crate::time::Duration;
 
 use super::abi::usercalls;
@@ -135,6 +136,13 @@ impl Thread {
     }
 }
 
+pub fn available_concurrency() -> io::Result<NonZeroUsize> {
+    Err(io::Error::new_const(
+        io::ErrorKind::NotFound,
+        &"The number of hardware threads is not known for the target platform",
+    ))
+}
+
 pub mod guard {
     pub type Guard = !;
     pub unsafe fn current() -> Option<Guard> {