#!@PYTHON@
#    This file is part of GNUnet.
#    (C) 2011 Christian Grothoff (and other contributing authors)
#
#    GNUnet is free software; you can redistribute it and/or modify
#    it under the terms of the GNU General Public License as published
#    by the Free Software Foundation; either version 2, or (at your
#    option) any later version.
#
#    GNUnet is distributed in the hope that it will be useful, but
#    WITHOUT ANY WARRANTY; without even the implied warranty of
#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
#    General Public License for more details.
#
#    You should have received a copy of the GNU General Public License
#    along with GNUnet; see the file COPYING.  If not, write to the
#    Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
#    Boston, MA 02110-1301, USA.
#
# Utility module that implements safe process termination for W32.
# For other platforms it's equivalent to Popen.kill ()
# Requires pywin32 on W32.

import sys
import os
import subprocess
if os.name == 'nt':
  import win32api
  import win32process

class dummyobj (object):
  pass

def safe_terminate_process_by_pid (pid, code):
  if os.name == 'nt':
    p = dummyobj ()
    p._handle = win32api.OpenProcess (2 | 1024 | 8 | 32 | 16, 0, pid)
    result = safe_terminate_process (p, code)
    win32api.CloseHandle (p._handle)
    return result
  else:
    return os.kill (int (pid), SIGKILL)

def safe_terminate_process (proc, code):
  if os.name == 'nt':
    cp = win32api.GetCurrentProcess ()
    result = False
    dupproc = win32api.DuplicateHandle (cp, proc._handle, cp, 2 | 1024 | 8 | 32 | 16, 0, 0)
    try:
      exitcode = win32process.GetExitCodeProcess (dupproc)
      if exitcode == 0x103:
        kernel32 = win32api.GetModuleHandle ("kernel32")
        exitprocess = win32api.GetProcAddress (kernel32, "ExitProcess")
        th, tid = win32process.CreateRemoteThread (dupproc, None, 0, exitprocess, code, 0)
        win32api.CloseHandle (th)
        result = True
      else:
        result = True
    # except failed to get exit code? failed to get module handle?
    finally:
      win32api.CloseHandle (dupproc)
    return result
  else:
    return proc.kill ()
