Library import 16 (#2433)

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1 files changed, 0 insertions, 307 deletions

diff --git a/contrib/tools/python3/src/Lib/multiprocessing/spawn.py b/contrib/tools/python3/src/Lib/multiprocessing/spawn.py
deleted file mode 100644
index a0ab98cfd2c..00000000000
--- a/contrib/tools/python3/src/Lib/multiprocessing/spawn.py
+++ /dev/null
@@ -1,307 +0,0 @@
-#
-# Code used to start processes when using the spawn or forkserver
-# start methods.
-#
-# multiprocessing/spawn.py
-#
-# Copyright (c) 2006-2008, R Oudkerk
-# Licensed to PSF under a Contributor Agreement.
-#
-
-import os
-import sys
-import runpy
-import types
-
-from . import get_start_method, set_start_method
-from . import process
-from .context import reduction
-from . import util
-
-__all__ = ['_main', 'freeze_support', 'set_executable', 'get_executable',
-           'get_preparation_data', 'get_command_line', 'import_main_path']
-
-#
-# _python_exe is the assumed path to the python executable.
-# People embedding Python want to modify it.
-#
-
-if sys.platform != 'win32':
-    WINEXE = False
-    WINSERVICE = False
-else:
-    WINEXE = getattr(sys, 'frozen', False)
-    WINSERVICE = sys.executable and sys.executable.lower().endswith("pythonservice.exe")
-
-def set_executable(exe):
-    global _python_exe
-    if exe is None:
-        _python_exe = exe
-    elif sys.platform == 'win32':
-        _python_exe = os.fsdecode(exe)
-    else:
-        _python_exe = os.fsencode(exe)
-
-def get_executable():
-    return _python_exe
-
-if WINSERVICE:
-    set_executable(os.path.join(sys.exec_prefix, 'python.exe'))
-else:
-    set_executable(sys.executable)
-
-#
-#
-#
-
-def is_forking(argv):
-    '''
-    Return whether commandline indicates we are forking
-    '''
-    if len(argv) >= 2 and argv[1] == '--multiprocessing-fork':
-        return True
-    else:
-        return False
-
-
-def freeze_support():
-    '''
-    Run code for process object if this in not the main process
-    '''
-    if is_forking(sys.argv):
-        kwds = {}
-        for arg in sys.argv[2:]:
-            name, value = arg.split('=')
-            if value == 'None':
-                kwds[name] = None
-            else:
-                kwds[name] = int(value)
-        spawn_main(**kwds)
-        sys.exit()
-
-
-def get_command_line(**kwds):
-    '''
-    Returns prefix of command line used for spawning a child process
-    '''
-    if False and getattr(sys, 'frozen', False):
-        return ([sys.executable, '--multiprocessing-fork'] +
-                ['%s=%r' % item for item in kwds.items()])
-    else:
-        prog = 'from multiprocessing.spawn import spawn_main; spawn_main(%s)'
-        prog %= ', '.join('%s=%r' % item for item in kwds.items())
-        opts = util._args_from_interpreter_flags()
-        exe = get_executable()
-        return [exe] + opts + ['-c', prog, '--multiprocessing-fork']
-
-
-def spawn_main(pipe_handle, parent_pid=None, tracker_fd=None):
-    '''
-    Run code specified by data received over pipe
-    '''
-    assert is_forking(sys.argv), "Not forking"
-    if sys.platform == 'win32':
-        import msvcrt
-        import _winapi
-
-        if parent_pid is not None:
-            source_process = _winapi.OpenProcess(
-                _winapi.SYNCHRONIZE | _winapi.PROCESS_DUP_HANDLE,
-                False, parent_pid)
-        else:
-            source_process = None
-        new_handle = reduction.duplicate(pipe_handle,
-                                         source_process=source_process)
-        fd = msvcrt.open_osfhandle(new_handle, os.O_RDONLY)
-        parent_sentinel = source_process
-    else:
-        from . import resource_tracker
-        resource_tracker._resource_tracker._fd = tracker_fd
-        fd = pipe_handle
-        parent_sentinel = os.dup(pipe_handle)
-    exitcode = _main(fd, parent_sentinel)
-    sys.exit(exitcode)
-
-
-def _main(fd, parent_sentinel):
-    with os.fdopen(fd, 'rb', closefd=True) as from_parent:
-        process.current_process()._inheriting = True
-        try:
-            preparation_data = reduction.pickle.load(from_parent)
-            prepare(preparation_data)
-            self = reduction.pickle.load(from_parent)
-        finally:
-            del process.current_process()._inheriting
-    return self._bootstrap(parent_sentinel)
-
-
-def _check_not_importing_main():
-    if getattr(process.current_process(), '_inheriting', False):
-        raise RuntimeError('''
-        An attempt has been made to start a new process before the
-        current process has finished its bootstrapping phase.
-
-        This probably means that you are not using fork to start your
-        child processes and you have forgotten to use the proper idiom
-        in the main module:
-
-            if __name__ == '__main__':
-                freeze_support()
-                ...
-
-        The "freeze_support()" line can be omitted if the program
-        is not going to be frozen to produce an executable.
-
-        To fix this issue, refer to the "Safe importing of main module"
-        section in https://docs.python.org/3/library/multiprocessing.html
-        ''')
-
-
-def get_preparation_data(name):
-    '''
-    Return info about parent needed by child to unpickle process object
-    '''
-    _check_not_importing_main()
-    d = dict(
-        log_to_stderr=util._log_to_stderr,
-        authkey=process.current_process().authkey,
-        )
-
-    if util._logger is not None:
-        d['log_level'] = util._logger.getEffectiveLevel()
-
-    sys_path=sys.path.copy()
-    try:
-        i = sys_path.index('')
-    except ValueError:
-        pass
-    else:
-        sys_path[i] = process.ORIGINAL_DIR
-
-    d.update(
-        name=name,
-        sys_path=sys_path,
-        sys_argv=sys.argv,
-        orig_dir=process.ORIGINAL_DIR,
-        dir=os.getcwd(),
-        start_method=get_start_method(),
-        )
-
-    # Figure out whether to initialise main in the subprocess as a module
-    # or through direct execution (or to leave it alone entirely)
-    main_module = sys.modules['__main__']
-    main_mod_name = getattr(main_module.__spec__, "name", None)
-    if main_mod_name is not None:
-        d['init_main_from_name'] = main_mod_name
-    elif sys.platform != 'win32' or (not WINEXE and not WINSERVICE):
-        main_path = getattr(main_module, '__file__', None)
-        if main_path is not None:
-            if (not os.path.isabs(main_path) and
-                        process.ORIGINAL_DIR is not None):
-                main_path = os.path.join(process.ORIGINAL_DIR, main_path)
-            d['init_main_from_path'] = os.path.normpath(main_path)
-
-    return d
-
-#
-# Prepare current process
-#
-
-old_main_modules = []
-
-def prepare(data):
-    '''
-    Try to get current process ready to unpickle process object
-    '''
-    if 'name' in data:
-        process.current_process().name = data['name']
-
-    if 'authkey' in data:
-        process.current_process().authkey = data['authkey']
-
-    if 'log_to_stderr' in data and data['log_to_stderr']:
-        util.log_to_stderr()
-
-    if 'log_level' in data:
-        util.get_logger().setLevel(data['log_level'])
-
-    if 'sys_path' in data:
-        sys.path = data['sys_path']
-
-    if 'sys_argv' in data:
-        sys.argv = data['sys_argv']
-
-    if 'dir' in data:
-        os.chdir(data['dir'])
-
-    if 'orig_dir' in data:
-        process.ORIGINAL_DIR = data['orig_dir']
-
-    if 'start_method' in data:
-        set_start_method(data['start_method'], force=True)
-
-    if 'init_main_from_name' in data:
-        _fixup_main_from_name(data['init_main_from_name'])
-    elif 'init_main_from_path' in data:
-        _fixup_main_from_path(data['init_main_from_path'])
-
-# Multiprocessing module helpers to fix up the main module in
-# spawned subprocesses
-def _fixup_main_from_name(mod_name):
-    # __main__.py files for packages, directories, zip archives, etc, run
-    # their "main only" code unconditionally, so we don't even try to
-    # populate anything in __main__, nor do we make any changes to
-    # __main__ attributes
-    current_main = sys.modules['__main__']
-    if mod_name == "__main__" or mod_name.endswith(".__main__"):
-        return
-
-    # If this process was forked, __main__ may already be populated
-    if getattr(current_main.__spec__, "name", None) == mod_name:
-        return
-
-    # Otherwise, __main__ may contain some non-main code where we need to
-    # support unpickling it properly. We rerun it as __mp_main__ and make
-    # the normal __main__ an alias to that
-    old_main_modules.append(current_main)
-    main_module = types.ModuleType("__mp_main__")
-    main_content = runpy.run_module(mod_name,
-                                    run_name="__mp_main__",
-                                    alter_sys=True)
-    main_module.__dict__.update(main_content)
-    sys.modules['__main__'] = sys.modules['__mp_main__'] = main_module
-
-
-def _fixup_main_from_path(main_path):
-    # If this process was forked, __main__ may already be populated
-    current_main = sys.modules['__main__']
-
-    # Unfortunately, the main ipython launch script historically had no
-    # "if __name__ == '__main__'" guard, so we work around that
-    # by treating it like a __main__.py file
-    # See https://github.com/ipython/ipython/issues/4698
-    main_name = os.path.splitext(os.path.basename(main_path))[0]
-    if main_name == 'ipython':
-        return
-
-    # Otherwise, if __file__ already has the setting we expect,
-    # there's nothing more to do
-    if getattr(current_main, '__file__', None) == main_path:
-        return
-
-    # If the parent process has sent a path through rather than a module
-    # name we assume it is an executable script that may contain
-    # non-main code that needs to be executed
-    old_main_modules.append(current_main)
-    main_module = types.ModuleType("__mp_main__")
-    main_content = runpy.run_path(main_path,
-                                  run_name="__mp_main__")
-    main_module.__dict__.update(main_content)
-    sys.modules['__main__'] = sys.modules['__mp_main__'] = main_module
-
-
-def import_main_path(main_path):
-    '''
-    Set sys.modules['__main__'] to module at main_path
-    '''
-    _fixup_main_from_path(main_path)