bpo-6532: Make the thread id an unsigned integer. (#781)

* bpo-6532: Make the thread id an unsigned integer.

From C API side the type of results of PyThread_start_new_thread() and
PyThread_get_thread_ident(), the id parameter of
PyThreadState_SetAsyncExc(), and the thread_id field of PyThreadState
changed from "long" to "unsigned long".

* Restore a check in thread_get_ident().

1 files changed, 6 insertions, 3 deletions

diff --git a/Lib/test/test_threading.py b/Lib/test/test_threading.py
index 6b6c4d2..5f7c0a8 100644
--- a/Lib/test/test_threading.py
+++ b/Lib/test/test_threading.py
@@ -181,6 +181,7 @@ class ThreadTests(BaseTestCase):
         ctypes = import_module("ctypes")
 
         set_async_exc = ctypes.pythonapi.PyThreadState_SetAsyncExc
+        set_async_exc.argtypes = (ctypes.c_ulong, ctypes.py_object)
 
         class AsyncExc(Exception):
             pass
@@ -189,9 +190,11 @@ class ThreadTests(BaseTestCase):
 
         # First check it works when setting the exception from the same thread.
         tid = threading.get_ident()
+        self.assertIsInstance(tid, int)
+        self.assertGreater(tid, 0)
 
         try:
-            result = set_async_exc(ctypes.c_long(tid), exception)
+            result = set_async_exc(tid, exception)
             # The exception is async, so we might have to keep the VM busy until
             # it notices.
             while True:
@@ -237,7 +240,7 @@ class ThreadTests(BaseTestCase):
         # Try a thread id that doesn't make sense.
         if verbose:
             print("    trying nonsensical thread id")
-        result = set_async_exc(ctypes.c_long(-1), exception)
+        result = set_async_exc(-1, exception)
         self.assertEqual(result, 0)  # no thread states modified
 
         # Now raise an exception in the worker thread.
@@ -250,7 +253,7 @@ class ThreadTests(BaseTestCase):
         self.assertFalse(t.finished)
         if verbose:
             print("    attempting to raise asynch exception in worker")
-        result = set_async_exc(ctypes.c_long(t.id), exception)
+        result = set_async_exc(t.id, exception)
         self.assertEqual(result, 1) # one thread state modified
         if verbose:
             print("    waiting for worker to say it caught the exception")