Move `available_concurrency` implementation to `sys`

1 files changed, 8 insertions, 0 deletions

diff --git a/library/std/src/sys/wasi/thread.rs b/library/std/src/sys/wasi/thread.rs
index 74515553a82..959077f7b54 100644
--- a/library/std/src/sys/wasi/thread.rs
+++ b/library/std/src/sys/wasi/thread.rs
@@ -3,6 +3,7 @@
 use crate::ffi::CStr;
 use crate::io;
 use crate::mem;
+use crate::num::NonZeroUsize;
 use crate::sys::unsupported;
 use crate::time::Duration;
 
@@ -63,6 +64,13 @@ 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> {