Add PyPy support for Darwin kqueue event-driven waiter

Author: Евгений Блинов

suby/process_waiting.py

@@ -23,10 +23,10 @@ def _wait_pidfd(pid: int, timeout_seconds: Optional[float]) -> None:
     _event_driven_waiter = _wait_pidfd
 
 elif sys.platform == 'darwin':  # pragma: no cover (!Darwin)
-    if not hasattr(select, 'kqueue'):  # pragma: no cover (Darwin)
+    if not hasattr(select, 'kqueue') or sys.implementation.name == 'pypy':  # pragma: no cover (Darwin and !PyPy)
         _event_driven_waiter = None
     else:
-        def _wait_kqueue(pid: int, timeout_seconds: Optional[float]) -> None:  # pragma: no cover (!Darwin)
+        def _wait_kqueue(pid: int, timeout_seconds: Optional[float]) -> None:  # pragma: no cover (!Darwin or PyPy)
             kq = select.kqueue()
             try:
                 ev = select.kevent(
@@ -39,7 +39,7 @@ def _wait_kqueue(pid: int, timeout_seconds: Optional[float]) -> None:  # pragma:
             finally:
                 kq.close()
 
-        _event_driven_waiter = _wait_kqueue
+        _event_driven_waiter = _wait_kqueue  # pragma: no cover (!Darwin or PyPy)
 
 
 def has_event_driven_wait() -> bool:
@@ -50,7 +50,7 @@ def wait_for_process_exit(process: 'Popen[str]', timeout_seconds: Optional[float
     if _event_driven_waiter is not None:
         try:
             _event_driven_waiter(process.pid, timeout_seconds)
-            return  # pragma: no cover (Windows or (Linux and <py39))
+            return  # pragma: no cover (Windows or (Linux and <py39) or (Darwin and PyPy))
         except OSError:
             pass
     if timeout_seconds is None: