From e5fc7d6a55fd3318f7e457bb27df0de3089dcc0a Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E7=8E=8B=E5=AE=87=E9=80=B8?= <Strawberry_Str@hotmail.com>
Date: Fri, 21 Mar 2025 12:50:27 +0800
Subject: [PATCH] Fix Thread::set_name on cygwin

---
 library/std/src/sys/pal/unix/thread.rs | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/library/std/src/sys/pal/unix/thread.rs b/library/std/src/sys/pal/unix/thread.rs
index bffe25362998..bb34c2fabe55 100644
--- a/library/std/src/sys/pal/unix/thread.rs
+++ b/library/std/src/sys/pal/unix/thread.rs
@@ -143,8 +143,8 @@ impl Thread {
     pub fn set_name(name: &CStr) {
         unsafe {
             cfg_if::cfg_if! {
-                if #[cfg(target_os = "linux")] {
-                    // Linux limits the allowed length of the name.
+                if #[cfg(any(target_os = "linux", target_os = "cygwin"))] {
+                    // Linux and Cygwin limits the allowed length of the name.
                     const TASK_COMM_LEN: usize = 16;
                     let name = truncate_cstr::<{ TASK_COMM_LEN }>(name);
                 } else {
@@ -346,6 +346,7 @@ impl Drop for Thread {
     target_os = "solaris",
     target_os = "illumos",
     target_os = "vxworks",
+    target_os = "cygwin",
     target_vendor = "apple",
 ))]
 fn truncate_cstr<const MAX_WITH_NUL: usize>(cstr: &CStr) -> [libc::c_char; MAX_WITH_NUL] {