From: Serhiy Storchaka <storchaka@gmail.com>
Date: Mon, 20 Jul 2026 20:21:13 +0000 (+0300)
Subject: [3.14] gh-154283: Make threading.get_native_id() unique across processes on DragonFly... 
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=903265fd16af7b11924c0ec16d546d8b5bf6bba6;p=thirdparty%2FPython%2Fcpython.git

[3.14] gh-154283: Make threading.get_native_id() unique across processes on DragonFly (GH-154287) (GH-154297)

On DragonFly BSD lwp_gettid() is only unique within a process (the main
thread is always LWP 1), so combine it with the process id, like Solaris.
(cherry picked from commit 53597df11e2d9f01ade2529c147df24b49685878)

Co-authored-by: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
---

diff --git a/Misc/NEWS.d/next/Library/2026-07-20-21-36-40.gh-issue-154283.Xip7xE.rst b/Misc/NEWS.d/next/Library/2026-07-20-21-36-40.gh-issue-154283.Xip7xE.rst
new file mode 100644
index 000000000000..a278d67e1824
--- /dev/null
+++ b/Misc/NEWS.d/next/Library/2026-07-20-21-36-40.gh-issue-154283.Xip7xE.rst
@@ -0,0 +1,2 @@
+On DragonFly BSD, :func:`threading.get_native_id` now returns a value that is
+unique across processes, matching the other platforms.
diff --git a/Python/thread_pthread.h b/Python/thread_pthread.h
index da4058242448..8e7b9589615b 100644
--- a/Python/thread_pthread.h
+++ b/Python/thread_pthread.h
@@ -407,8 +407,8 @@ PyThread_get_thread_native_id(void)
     lwpid_t native_id;
     native_id = _lwp_self();
 #elif defined(__DragonFly__)
-    lwpid_t native_id;
-    native_id = lwp_gettid();
+    // lwp_gettid() is only unique within a process, so combine it with the pid.
+    unsigned long native_id = (unsigned long)getpid() << 32 | lwp_gettid();
 #endif
     return (unsigned long) native_id;
 }