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Name	Size	Permission	Date
__pycache__	[ DIR ]	drwxr-xr-x	2022-03-20 10:37
dummy	[ DIR ]	drwxrwxrwx	2022-03-20 10:37
__init__.py	923 B	-rw-r--r--	2021-11-04 16:29
connection.py	30.13 KB	-rw-r--r--	2021-11-04 16:29
context.py	10.43 KB	-rw-r--r--	2021-11-04 16:29
forkserver.py	7.78 KB	-rw-r--r--	2021-11-04 16:29
heap.py	8.13 KB	-rw-r--r--	2021-11-04 16:29
managers.py	35.12 KB	-rw-r--r--	2021-11-04 16:29
pool.py	24.14 KB	-rw-r--r--	2021-11-04 16:29
popen_fork.py	2.27 KB	-rw-r--r--	2021-11-04 16:29
popen_forkserver.py	1.92 KB	-rw-r--r--	2021-11-04 16:29
popen_spawn_posix.py	1.87 KB	-rw-r--r--	2021-11-04 16:29
popen_spawn_win32.py	2.93 KB	-rw-r--r--	2021-11-04 16:29
process.py	8.75 KB	-rw-r--r--	2021-11-04 16:29
queues.py	10.9 KB	-rw-r--r--	2021-11-04 16:29
reduction.py	7.92 KB	-rw-r--r--	2021-11-04 16:29
resource_sharer.py	5.19 KB	-rw-r--r--	2021-11-04 16:29
semaphore_tracker.py	4.71 KB	-rw-r--r--	2021-11-04 16:29
sharedctypes.py	6.08 KB	-rw-r--r--	2021-11-04 16:29
spawn.py	8.65 KB	-rw-r--r--	2021-11-04 16:29
synchronize.py	11.77 KB	-rw-r--r--	2021-11-04 16:29
util.py	10.99 KB	-rw-r--r--	2021-11-04 16:29

Rename

import io
import os

from . import reduction
if not reduction.HAVE_SEND_HANDLE:
    raise ImportError('No support for sending fds between processes')
from . import context
from . import forkserver
from . import popen_fork
from . import spawn
from . import util

__all__ = ['Popen']

#
# Wrapper for an fd used while launching a process
#

class _DupFd(object):
    def __init__(self, ind):
        self.ind = ind
    def detach(self):
        return forkserver.get_inherited_fds()[self.ind]

#
# Start child process using a server process
#

class Popen(popen_fork.Popen):
    method = 'forkserver'
    DupFd = _DupFd

def __init__(self, process_obj):
        self._fds = []
        super().__init__(process_obj)

def duplicate_for_child(self, fd):
        self._fds.append(fd)
        return len(self._fds) - 1

def _launch(self, process_obj):
        prep_data = spawn.get_preparation_data(process_obj._name)
        buf = io.BytesIO()
        context.set_spawning_popen(self)
        try:
            reduction.dump(prep_data, buf)
            reduction.dump(process_obj, buf)
        finally:
            context.set_spawning_popen(None)

self.sentinel, w = forkserver.connect_to_new_process(self._fds)
        util.Finalize(self, os.close, (self.sentinel,))
        with open(w, 'wb', closefd=True) as f:
            f.write(buf.getbuffer())
        self.pid = forkserver.read_unsigned(self.sentinel)

def poll(self, flag=os.WNOHANG):
        if self.returncode is None:
            from multiprocessing.connection import wait
            timeout = 0 if flag == os.WNOHANG else None
            if not wait([self.sentinel], timeout):
                return None
            try:
                self.returncode = forkserver.read_unsigned(self.sentinel)
            except (OSError, EOFError):
                # The process ended abnormally perhaps because of a signal
                self.returncode = 255
        return self.returncode