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"""Support for SSL socket timeouts.
Copyright (c) 1999-2003 Ng Pheng Siong. All rights reserved.
Copyright 2008 Heikki Toivonen. All rights reserved.
"""
__all__ = ['DEFAULT_TIMEOUT', 'timeout', 'struct_to_timeout', 'struct_size']
import sys
import struct
DEFAULT_TIMEOUT = 600 # type: int
class timeout(object):
def __init__(self, sec=DEFAULT_TIMEOUT, microsec=0):
# type: (int, int) -> None
self.sec = sec
self.microsec = microsec
def pack(self):
if sys.platform == 'win32':
millisec = int(self.sec * 1000 + round(float(self.microsec) / 1000))
binstr = struct.pack('l', millisec)
else:
binstr = struct.pack('ll', self.sec, self.microsec)
return binstr
def struct_to_timeout(binstr):
# type: (bytes) -> timeout
if sys.platform == 'win32':
millisec = struct.unpack('l', binstr)[0]
# On py3, int/int performs exact division and returns float. We want
# the whole number portion of the exact division result:
sec = int(millisec / 1000)
microsec = (millisec % 1000) * 1000
else:
(sec, microsec) = struct.unpack('ll', binstr)
return timeout(sec, microsec)
def struct_size():
# type: () -> int
if sys.platform == 'win32':
return struct.calcsize('l')
else:
return struct.calcsize('ll')
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