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from io import BufferedIOBase
import logging
import os
import sys
_logger = logging.getLogger(__name__)
if sys.platform == 'win32':
import _winapi
import msvcrt
class WindowsPipe:
def __init__(self, experiment_id: str):
self.path: str = r'\\.\pipe\nni-' + experiment_id
self.file = None
self._handle = _winapi.CreateNamedPipe(
self.path,
_winapi.PIPE_ACCESS_DUPLEX,
_winapi.PIPE_TYPE_MESSAGE | _winapi.PIPE_READMODE_MESSAGE | _winapi.PIPE_WAIT,
1,
8192,
8192,
0,
_winapi.NULL
)
def connect(self) -> BufferedIOBase:
_winapi.ConnectNamedPipe(self._handle, _winapi.NULL)
fd = msvcrt.open_osfhandle(self._handle, 0)
self.file = os.fdopen(fd, 'w+b')
return self.file
def close(self) -> None:
try:
if self.file is not None:
self.file.close()
except Exception as e:
_logger.debug('Error on closing Windows pipe: %s', e)
Pipe = WindowsPipe
else:
import socket
from . import management
class UnixPipe:
def __init__(self, experiment_id: str):
self.path: str = str(management.create_experiment_directory(experiment_id) / 'dispatcher-pipe')
self.file = None
self._socket = socket.socket(socket.AF_UNIX)
self._socket.bind(self.path)
self._socket.listen(1) # only accepts one connection
def connect(self) -> BufferedIOBase:
conn, _ = self._socket.accept()
self.file = conn.makefile('rwb')
return self.file
def close(self) -> None:
try:
if self.file is not None:
self.file.close()
self._socket.close()
os.unlink(self.path)
except Exception as e:
_logger.debug('Error on closing POSIX pipe: %s', e)
Pipe = UnixPipe
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