popen_spawn_win32.py 文件源码

def __init__(self, process_obj):
        prep_data = spawn.get_preparation_data(process_obj._name)

        # read end of pipe will be "stolen" by the child process
        # -- see spawn_main() in spawn.py.
        rhandle, whandle = _winapi.CreatePipe(None, 0)
        wfd = msvcrt.open_osfhandle(whandle, 0)
        cmd = spawn.get_command_line(parent_pid=os.getpid(),
                                     pipe_handle=rhandle)
        cmd = ' '.join('"%s"' % x for x in cmd)

        with open(wfd, 'wb', closefd=True) as to_child:
            # start process
            try:
                hp, ht, pid, tid = _winapi.CreateProcess(
                    spawn.get_executable(), cmd,
                    None, None, False, 0, None, None, None)
                _winapi.CloseHandle(ht)
            except:
                _winapi.CloseHandle(rhandle)
                raise

            # set attributes of self
            self.pid = pid
            self.returncode = None
            self._handle = hp
            self.sentinel = int(hp)
            util.Finalize(self, _winapi.CloseHandle, (self.sentinel,))

            # send information to child
            context.set_spawning_popen(self)
            try:
                reduction.dump(prep_data, to_child)
                reduction.dump(process_obj, to_child)
            finally:
                context.set_spawning_popen(None)