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Commit Description:
Merge pull request #17 from nattee/master...
Commit Description:
Merge pull request #17 from nattee/master
upgrade to current working snapshot
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lib/assets/Lib/multiprocessing/process.py
| 112 lines
| 2.4 KiB
| text/x-python
| PythonLexer
|
| r584 | # | |||
| # Module providing the `Process` class which emulates `threading.Thread` | ||||
| # | ||||
| # multiprocessing/process.py | ||||
| # | ||||
| # Copyright (c) 2006-2008, R Oudkerk | ||||
| # Licensed to PSF under a Contributor Agreement. | ||||
| # | ||||
| __all__ = ['Process', 'current_process', 'active_children'] | ||||
| # | ||||
| # Imports | ||||
| # | ||||
| import os | ||||
| import sys | ||||
| import signal | ||||
| import itertools | ||||
| from _weakrefset import WeakSet | ||||
| #for brython | ||||
| from _multiprocessing import Process | ||||
| # | ||||
| # | ||||
| # | ||||
| try: | ||||
| ORIGINAL_DIR = os.path.abspath(os.getcwd()) | ||||
| except OSError: | ||||
| ORIGINAL_DIR = None | ||||
| # | ||||
| # Public functions | ||||
| # | ||||
| def current_process(): | ||||
| ''' | ||||
| Return process object representing the current process | ||||
| ''' | ||||
| return _current_process | ||||
| def active_children(): | ||||
| ''' | ||||
| Return list of process objects corresponding to live child processes | ||||
| ''' | ||||
| _cleanup() | ||||
| return list(_current_process._children) | ||||
| # | ||||
| # | ||||
| # | ||||
| def _cleanup(): | ||||
| # check for processes which have finished | ||||
| for p in list(_current_process._children): | ||||
| if p._popen.poll() is not None: | ||||
| _current_process._children.discard(p) | ||||
| # | ||||
| # The `Process` class | ||||
| # | ||||
| # brython note: class Process is defined in /usr/libs/_multiprocessing.js | ||||
| # | ||||
| # We subclass bytes to avoid accidental transmission of auth keys over network | ||||
| # | ||||
| class AuthenticationString(bytes): | ||||
| def __reduce__(self): | ||||
| from .forking import Popen | ||||
| if not Popen.thread_is_spawning(): | ||||
| raise TypeError( | ||||
| 'Pickling an AuthenticationString object is ' | ||||
| 'disallowed for security reasons' | ||||
| ) | ||||
| return AuthenticationString, (bytes(self),) | ||||
| # | ||||
| # Create object representing the main process | ||||
| # | ||||
| class _MainProcess(Process): | ||||
| def __init__(self): | ||||
| self._identity = () | ||||
| self._daemonic = False | ||||
| self._name = 'MainProcess' | ||||
| self._parent_pid = None | ||||
| self._popen = None | ||||
| self._counter = itertools.count(1) | ||||
| self._children = set() | ||||
| self._authkey = AuthenticationString(os.urandom(32)) | ||||
| self._tempdir = None | ||||
| _current_process = _MainProcess() | ||||
| del _MainProcess | ||||
| # | ||||
| # Give names to some return codes | ||||
| # | ||||
| _exitcode_to_name = {} | ||||
| for name, signum in list(signal.__dict__.items()): | ||||
| if name[:3]=='SIG' and '_' not in name: | ||||
| _exitcode_to_name[-signum] = name | ||||
| # For debug and leak testing | ||||
| _dangling = WeakSet() | ||||