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

Author: yuce

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__)
 #define PY_HAVE_THREAD_NATIVE_ID
 PyAPI_FUNC(unsigned long) PyThread_get_thread_native_id(void);
 #endif

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__)
+ #   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__)
+    unsigned long native_id = (unsigned long)getpid() << 32 | thr_self();
 #endif
     return (unsigned long) native_id;
 }