From 8795750d43e650e35246e590538c73a4f18818cd Mon Sep 17 00:00:00 2001
From: Yoh Deadfall <yoh.deadfall@hotmail.com>
Date: Mon, 4 Nov 2024 20:59:22 +0300
Subject: [PATCH] Used pthread name functions returning result for FreeBSD and
 DragonFly

---
 library/std/src/sys/pal/unix/thread.rs | 24 +++++++++++++-----------
 1 file changed, 13 insertions(+), 11 deletions(-)

diff --git a/library/std/src/sys/pal/unix/thread.rs b/library/std/src/sys/pal/unix/thread.rs
index 040246618360f..692fc845b1d68 100644
--- a/library/std/src/sys/pal/unix/thread.rs
+++ b/library/std/src/sys/pal/unix/thread.rs
@@ -129,25 +129,27 @@ impl Thread {
         }
     }
 
-    #[cfg(target_os = "linux")]
+    #[cfg(any(target_os = "linux", target_os = "freebsd", target_os = "dragonfly"))]
     pub fn set_name(name: &CStr) {
-        const TASK_COMM_LEN: usize = 16;
-
         unsafe {
-            // Available since glibc 2.12, musl 1.1.16, and uClibc 1.0.20.
-            let name = truncate_cstr::<{ TASK_COMM_LEN }>(name);
+            cfg_if::cfg_if! {
+                if #[cfg(target_os = "linux")] {
+                    // Linux limits the allowed length of the name.
+                    const TASK_COMM_LEN: usize = 16;
+                    let name = truncate_cstr::<{ TASK_COMM_LEN }>(name);
+                } else {
+                    // FreeBSD and DragonFly BSD do not enforce length limits.
+                }
+            };
+            // Available since glibc 2.12, musl 1.1.16, and uClibc 1.0.20 for Linux,
+            // FreeBSD 12.2 and 13.0, and DragonFly BSD 6.0.
             let res = libc::pthread_setname_np(libc::pthread_self(), name.as_ptr());
             // We have no good way of propagating errors here, but in debug-builds let's check that this actually worked.
             debug_assert_eq!(res, 0);
         }
     }
 
-    #[cfg(any(
-        target_os = "freebsd",
-        target_os = "dragonfly",
-        target_os = "openbsd",
-        target_os = "nuttx"
-    ))]
+    #[cfg(any(target_os = "openbsd", target_os = "nuttx"))]
     pub fn set_name(name: &CStr) {
         unsafe {
             libc::pthread_set_name_np(libc::pthread_self(), name.as_ptr());