Remove third_party/twisted_8_1

third_party/twisted_8_1/twisted/internet/fdesc.py

-# -*- test-case-name: twisted.test.test_fdesc -*-
-
-# Copyright (c) 2001-2007 Twisted Matrix Laboratories.
-# See LICENSE for details.
-
-
-"""
-Utility functions for dealing with POSIX file descriptors.
-"""
-
-import sys
-import os
-import errno
-import fcntl
-if (sys.hexversion >> 16) >= 0x202:
-    FCNTL = fcntl
-else:
-    import FCNTL
-
-# twisted imports
-from twisted.internet.main import CONNECTION_LOST, CONNECTION_DONE
-
-
-def setNonBlocking(fd):
-    """
-    Make a file descriptor non-blocking.
-    """
-    flags = fcntl.fcntl(fd, FCNTL.F_GETFL)
-    flags = flags | os.O_NONBLOCK
-    fcntl.fcntl(fd, FCNTL.F_SETFL, flags)
-
-
-def setBlocking(fd):
-    """
-    Make a file descriptor blocking.
-    """
-    flags = fcntl.fcntl(fd, FCNTL.F_GETFL)
-    flags = flags & ~os.O_NONBLOCK
-    fcntl.fcntl(fd, FCNTL.F_SETFL, flags)
-
-
-def readFromFD(fd, callback):
-    """
-    Read from file descriptor, calling callback with resulting data.
-
-    Returns same thing FileDescriptor.doRead would.
-
-    @type fd: C{int}
-    @param fd: non-blocking file descriptor to be read from.
-    @param callback: a callable which accepts a single argument. If
-    data is read from the file descriptor it will be called with this
-    data. Handling exceptions from calling the callback is up to the
-    caller.
-
-    Note that if the descriptor is still connected but no data is read,
-    None will be returned but callback will not be called.
-
-    @return: CONNECTION_LOST on error, CONNECTION_DONE when fd is
-    closed, otherwise None.
-    """
-    try:
-        output = os.read(fd, 8192)
-    except (OSError, IOError), ioe:
-        if ioe.args[0] in (errno.EAGAIN, errno.EINTR):
-            return
-        else:
-            return CONNECTION_LOST
-    if not output:
-        return CONNECTION_DONE
-    callback(output)
-
-def writeToFD(fd, data):
-    """
-    Write data to file descriptor.
-
-    Returns same thing FileDescriptor.writeSomeData would.
-
-    @type fd: C{int}
-    @param fd: non-blocking file descriptor to be written to.
-    @type data: C{str} or C{buffer}
-    @param data: bytes to write to fd.
-
-    @return: number of bytes written, or CONNECTION_LOST.
-    """
-    try:
-        return os.write(fd, data)
-    except (OSError, IOError), io:
-        if io.errno in (errno.EAGAIN, errno.EINTR):
-            return 0
-        return CONNECTION_LOST
-
-
-__all__ = ["setNonBlocking", "setBlocking", "readFromFD", "writeToFD"]