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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 os
import sys
import signal

from . import util

__all__ = ['Popen']

#
# Start child process using fork
#

class Popen(object):
    method = 'fork'

def __init__(self, process_obj):
        sys.stdout.flush()
        sys.stderr.flush()
        self.returncode = None
        self._launch(process_obj)

def duplicate_for_child(self, fd):
        return fd

def poll(self, flag=os.WNOHANG):
        if self.returncode is None:
            while True:
                try:
                    pid, sts = os.waitpid(self.pid, flag)
                except OSError as e:
                    # Child process not yet created. See #1731717
                    # e.errno == errno.ECHILD == 10
                    return None
                else:
                    break
            if pid == self.pid:
                if os.WIFSIGNALED(sts):
                    self.returncode = -os.WTERMSIG(sts)
                else:
                    assert os.WIFEXITED(sts)
                    self.returncode = os.WEXITSTATUS(sts)
        return self.returncode

def wait(self, timeout=None):
        if self.returncode is None:
            if timeout is not None:
                from multiprocessing.connection import wait
                if not wait([self.sentinel], timeout):
                    return None
            # This shouldn't block if wait() returned successfully.
            return self.poll(os.WNOHANG if timeout == 0.0 else 0)
        return self.returncode

def terminate(self):
        if self.returncode is None:
            try:
                os.kill(self.pid, signal.SIGTERM)
            except ProcessLookupError:
                pass
            except OSError:
                if self.wait(timeout=0.1) is None:
                    raise

def _launch(self, process_obj):
        code = 1
        parent_r, child_w = os.pipe()
        self.pid = os.fork()
        if self.pid == 0:
            try:
                os.close(parent_r)
                if 'random' in sys.modules:
                    import random
                    random.seed()
                code = process_obj._bootstrap()
            finally:
                os._exit(code)
        else:
            os.close(child_w)
            util.Finalize(self, os.close, (parent_r,))
            self.sentinel = parent_r