def start(self, initializer=None, initargs=()):
'''
Spawn a server process for this manager object
'''
assert self._state.value == State.INITIAL
if initializer is not None and not hasattr(initializer, '__call__'):
raise TypeError('initializer must be a callable')
# pipe over which we will retrieve address of server
reader, writer = connection.Pipe(duplex=False)
# spawn process which runs a server
self._process = Process(
target=type(self)._run_server,
args=(self._registry, self._address, self._authkey,
self._serializer, writer, initializer, initargs),
)
ident = ':'.join(str(i) for i in self._process._identity)
self._process.name = type(self).__name__ + '-' + ident
self._process.start()
# get address of server
writer.close()
self._address = reader.recv()
reader.close()
# register a finalizer
self._state.value = State.STARTED
self.shutdown = util.Finalize(
self, type(self)._finalize_manager,
args=(self._process, self._address, self._authkey,
self._state, self._Client),
exitpriority=0
)
def _incref(self):
conn = self._Client(self._token.address, authkey=self._authkey)
dispatch(conn, None, 'incref', (self._id,))
util.debug('INCREF %r', self._token.id)
self._idset.add(self._id)
state = self._manager and self._manager._state
self._close = util.Finalize(
self, BaseProxy._decref,
args=(self._token, self._authkey, state,
self._tls, self._idset, self._Client),
exitpriority=10
)
def __init__(self, process_obj):
sys.stdout.flush()
sys.stderr.flush()
self.returncode = None
r, w = os.pipe()
self.sentinel = r
self.pid = os.fork()
if self.pid == 0:
os.close(r)
if 'random' in sys.modules:
import random
random.seed()
code = process_obj._bootstrap()
os._exit(code)
# `w` will be closed when the child exits, at which point `r`
# will become ready for reading (using e.g. select()).
os.close(w)
util.Finalize(self, os.close, (r,))
def __init__(self, process_obj):
cmd = ' '.join('"%s"' % x for x in get_command_line())
prep_data = get_preparation_data(process_obj._name)
# create pipe for communication with child
rfd, wfd = os.pipe()
# get handle for read end of the pipe and make it inheritable
rhandle = duplicate(msvcrt.get_osfhandle(rfd), inheritable=True)
os.close(rfd)
with open(wfd, 'wb', closefd=True) as to_child:
# start process
try:
hp, ht, pid, tid = _winapi.CreateProcess(
_python_exe, cmd + (' %s' % rhandle),
None, None, 1, 0, None, None, None
)
_winapi.CloseHandle(ht)
finally:
close(rhandle)
# 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
Popen._tls.process_handle = int(hp)
try:
dump(prep_data, to_child, HIGHEST_PROTOCOL)
dump(process_obj, to_child, HIGHEST_PROTOCOL)
finally:
del Popen._tls.process_handle
