gh-137884: Added threading.get_native_id on Illumos/Solaris

Doc/library/_thread.rst

@@ -120,13 +120,16 @@ This module defines the following constants and functions:
    Its value may be used to uniquely identify this particular thread system-wide
    (until the thread terminates, after which the value may be recycled by the OS).
 
-   .. availability:: Windows, FreeBSD, Linux, macOS, OpenBSD, NetBSD, AIX, DragonFlyBSD, GNU/kFreeBSD.
+   .. availability:: Windows, FreeBSD, Linux, macOS, OpenBSD, NetBSD, AIX, DragonFlyBSD, GNU/kFreeBSD, Solaris.
 
    .. versionadded:: 3.8
 
    .. versionchanged:: 3.13
       Added support for GNU/kFreeBSD.
 
+   .. versionchanged:: next
+      Added support for Solaris.
+
 
 .. function:: stack_size([size])
 

Doc/library/threading.rst

@@ -191,13 +191,16 @@ This module defines the following functions:
    Its value may be used to uniquely identify this particular thread system-wide
    (until the thread terminates, after which the value may be recycled by the OS).
 
-   .. availability:: Windows, FreeBSD, Linux, macOS, OpenBSD, NetBSD, AIX, DragonFlyBSD, GNU/kFreeBSD.
+   .. availability:: Windows, FreeBSD, Linux, macOS, OpenBSD, NetBSD, AIX, DragonFlyBSD, GNU/kFreeBSD, Solaris.
 
    .. versionadded:: 3.8
 
    .. versionchanged:: 3.13
       Added support for GNU/kFreeBSD.
 
+   .. versionchanged:: next
+      Added support for Solaris.
+
 
 .. function:: enumerate()
 

Include/pythread.h

@@ -42,7 +42,8 @@ PyAPI_FUNC(unsigned long) PyThread_get_thread_ident(void);
 #if (defined(__APPLE__) || defined(__linux__) || defined(_WIN32) \
      || defined(__FreeBSD__) || defined(__FreeBSD_kernel__) \
      || defined(__OpenBSD__) || defined(__NetBSD__) \
-     || defined(__DragonFly__) || defined(_AIX))
+     || defined(__DragonFly__) || defined(_AIX) \
+     || (defined(__sun__) && SIZEOF_LONG >= 8))
 #define PY_HAVE_THREAD_NATIVE_ID
 PyAPI_FUNC(unsigned long) PyThread_get_thread_native_id(void);
 #endif

Misc/NEWS.d/next/Library/2025-08-19-00-12-57.gh-issue-137884.4faCA_.rst

@@ -0,0 +1,2 @@
+Add :func:`threading.get_native_id` support for Illumos/Solaris. Patch by
+Yüce Tekol.

Python/thread_pthread.h

@@ -30,6 +30,8 @@
 #   include <lwp.h>             /* _lwp_self() */
 #elif defined(__DragonFly__)
 #   include <sys/lwp.h>         /* lwp_gettid() */
+#elif defined(__sun__) && SIZEOF_LONG >= 8
+#   include <thread.h>
 #endif
 
 /* The POSIX spec requires that use of pthread_attr_setstacksize
@@ -399,6 +401,8 @@ PyThread_get_thread_native_id(void)
 #elif defined(__DragonFly__)
     lwpid_t native_id;
     native_id = lwp_gettid();
+#elif defined(__sun__) && SIZEOF_LONG >= 8
+    unsigned long native_id = (unsigned long)getpid() << 32 | thr_self();
 #endif
     return (unsigned long) native_id;
 }