Major fixes and new features

venv/lib/python3.12/site-packages/mypy/dmypy_os.py

@@ -0,0 +1,42 @@
+from __future__ import annotations
+
+import sys
+from typing import Any, Callable
+
+if sys.platform == "win32":
+    import ctypes
+    import subprocess
+    from ctypes.wintypes import DWORD, HANDLE
+
+    PROCESS_QUERY_LIMITED_INFORMATION = ctypes.c_ulong(0x1000)
+
+    kernel32 = ctypes.windll.kernel32
+    OpenProcess: Callable[[DWORD, int, int], HANDLE] = kernel32.OpenProcess
+    GetExitCodeProcess: Callable[[HANDLE, Any], int] = kernel32.GetExitCodeProcess
+else:
+    import os
+    import signal
+
+
+def alive(pid: int) -> bool:
+    """Is the process alive?"""
+    if sys.platform == "win32":
+        # why can't anything be easy...
+        status = DWORD()
+        handle = OpenProcess(PROCESS_QUERY_LIMITED_INFORMATION, 0, pid)
+        GetExitCodeProcess(handle, ctypes.byref(status))
+        return status.value == 259  # STILL_ACTIVE
+    else:
+        try:
+            os.kill(pid, 0)
+        except OSError:
+            return False
+        return True
+
+
+def kill(pid: int) -> None:
+    """Kill the process."""
+    if sys.platform == "win32":
+        subprocess.check_output(f"taskkill /pid {pid} /f /t")
+    else:
+        os.kill(pid, signal.SIGKILL)