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__pycache__	-	Open
base_events.py	78.36 MB	View DL Edit
base_futures.py	1.93 MB	View DL Edit
base_subprocess.py	9.45 MB	View DL Edit
base_tasks.py	2.61 MB	View DL Edit
constants.py	1.38 MB	View DL Edit
coroutines.py	3.26 MB	View DL Edit
events.py	29.09 MB	View DL Edit
exceptions.py	1.71 MB	View DL Edit
format_helpers.py	2.66 MB	View DL Edit
futures.py	13.83 MB	View DL Edit
locks.py	20.1 MB	View DL Edit
log.py	124 B	View DL Edit
mixins.py	481 B	View DL Edit
proactor_events.py	32.71 MB	View DL Edit
protocols.py	6.79 MB	View DL Edit
queues.py	9.94 MB	View DL Edit
runners.py	7.06 MB	View DL Edit
selector_events.py	47.04 MB	View DL Edit
sslproto.py	31.12 MB	View DL Edit
staggered.py	6.91 MB	View DL Edit
streams.py	27.81 MB	View DL Edit
subprocess.py	7.56 MB	View DL Edit
taskgroups.py	9.81 MB	View DL Edit
tasks.py	38.83 MB	View DL Edit
threads.py	790 B	View DL Edit
timeouts.py	5.92 MB	View DL Edit
transports.py	10.55 MB	View DL Edit
trsock.py	2.42 MB	View DL Edit
unix_events.py	53.14 MB	View DL Edit
windows_events.py	31.87 MB	View DL Edit
windows_utils.py	4.94 MB	View DL Edit
__init__.py	1.19 MB	View DL Edit
__main__.py	5.98 MB	View DL Edit

Edit file: /opt/alt/python313/lib64/python3.13/asyncio/windows_utils.py

"""Various Windows specific bits and pieces."""

import sys

if sys.platform != 'win32':  # pragma: no cover
    raise ImportError('win32 only')

import _winapi
import itertools
import msvcrt
import os
import subprocess
import tempfile
import warnings

__all__ = 'pipe', 'Popen', 'PIPE', 'PipeHandle'

# Constants/globals

BUFSIZE = 8192
PIPE = subprocess.PIPE
STDOUT = subprocess.STDOUT
_mmap_counter = itertools.count()

# Replacement for os.pipe() using handles instead of fds

def pipe(*, duplex=False, overlapped=(True, True), bufsize=BUFSIZE):
    """Like os.pipe() but with overlapped support and using handles not fds."""
    address = tempfile.mktemp(
        prefix=r'\\.\pipe\python-pipe-{:d}-{:d}-'.format(
            os.getpid(), next(_mmap_counter)))

if duplex:
        openmode = _winapi.PIPE_ACCESS_DUPLEX
        access = _winapi.GENERIC_READ | _winapi.GENERIC_WRITE
        obsize, ibsize = bufsize, bufsize
    else:
        openmode = _winapi.PIPE_ACCESS_INBOUND
        access = _winapi.GENERIC_WRITE
        obsize, ibsize = 0, bufsize

openmode |= _winapi.FILE_FLAG_FIRST_PIPE_INSTANCE

if overlapped[0]:
        openmode |= _winapi.FILE_FLAG_OVERLAPPED

if overlapped[1]:
        flags_and_attribs = _winapi.FILE_FLAG_OVERLAPPED
    else:
        flags_and_attribs = 0

h1 = h2 = None
    try:
        h1 = _winapi.CreateNamedPipe(
            address, openmode, _winapi.PIPE_WAIT,
            1, obsize, ibsize, _winapi.NMPWAIT_WAIT_FOREVER, _winapi.NULL)

h2 = _winapi.CreateFile(
            address, access, 0, _winapi.NULL, _winapi.OPEN_EXISTING,
            flags_and_attribs, _winapi.NULL)

ov = _winapi.ConnectNamedPipe(h1, overlapped=True)
        ov.GetOverlappedResult(True)
        return h1, h2
    except:
        if h1 is not None:
            _winapi.CloseHandle(h1)
        if h2 is not None:
            _winapi.CloseHandle(h2)
        raise

# Wrapper for a pipe handle

class PipeHandle:
    """Wrapper for an overlapped pipe handle which is vaguely file-object like.

The IOCP event loop can use these instead of socket objects.
    """
    def __init__(self, handle):
        self._handle = handle

def __repr__(self):
        if self._handle is not None:
            handle = f'handle={self._handle!r}'
        else:
            handle = 'closed'
        return f'<{self.__class__.__name__} {handle}>'

@property
    def handle(self):
        return self._handle

def fileno(self):
        if self._handle is None:
            raise ValueError("I/O operation on closed pipe")
        return self._handle

def close(self, *, CloseHandle=_winapi.CloseHandle):
        if self._handle is not None:
            CloseHandle(self._handle)
            self._handle = None

def __del__(self, _warn=warnings.warn):
        if self._handle is not None:
            _warn(f"unclosed {self!r}", ResourceWarning, source=self)
            self.close()

def __enter__(self):
        return self

def __exit__(self, t, v, tb):
        self.close()

# Replacement for subprocess.Popen using overlapped pipe handles

class Popen(subprocess.Popen):
    """Replacement for subprocess.Popen using overlapped pipe handles.

The stdin, stdout, stderr are None or instances of PipeHandle.
    """
    def __init__(self, args, stdin=None, stdout=None, stderr=None, **kwds):
        assert not kwds.get('universal_newlines')
        assert kwds.get('bufsize', 0) == 0
        stdin_rfd = stdout_wfd = stderr_wfd = None
        stdin_wh = stdout_rh = stderr_rh = None
        if stdin == PIPE:
            stdin_rh, stdin_wh = pipe(overlapped=(False, True), duplex=True)
            stdin_rfd = msvcrt.open_osfhandle(stdin_rh, os.O_RDONLY)
        else:
            stdin_rfd = stdin
        if stdout == PIPE:
            stdout_rh, stdout_wh = pipe(overlapped=(True, False))
            stdout_wfd = msvcrt.open_osfhandle(stdout_wh, 0)
        else:
            stdout_wfd = stdout
        if stderr == PIPE:
            stderr_rh, stderr_wh = pipe(overlapped=(True, False))
            stderr_wfd = msvcrt.open_osfhandle(stderr_wh, 0)
        elif stderr == STDOUT:
            stderr_wfd = stdout_wfd
        else:
            stderr_wfd = stderr
        try:
            super().__init__(args, stdin=stdin_rfd, stdout=stdout_wfd,
                             stderr=stderr_wfd, **kwds)
        except:
            for h in (stdin_wh, stdout_rh, stderr_rh):
                if h is not None:
                    _winapi.CloseHandle(h)
            raise
        else:
            if stdin_wh is not None:
                self.stdin = PipeHandle(stdin_wh)
            if stdout_rh is not None:
                self.stdout = PipeHandle(stdout_rh)
            if stderr_rh is not None:
                self.stderr = PipeHandle(stderr_rh)
        finally:
            if stdin == PIPE:
                os.close(stdin_rfd)
            if stdout == PIPE:
                os.close(stdout_wfd)
            if stderr == PIPE:
                os.close(stderr_wfd)

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