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https://github.com/openvswitch/ovs
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bdca6c4b56
Resolve pep8 errors E302 and E303: E302 expected 2 blank lines, found 1 E303 too many blank lines (3) Signed-off-by: Russell Bryant <russell@ovn.org> Acked-by: Ben Pfaff <blp@ovn.org>
82 lines
2.4 KiB
Python
82 lines
2.4 KiB
Python
# Copyright (c) 2009, 2010 Nicira, Inc.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at:
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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import sys
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import time
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try:
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import ctypes
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LIBRT = 'librt.so.1'
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clock_gettime_name = 'clock_gettime'
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if sys.platform.startswith("linux"):
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CLOCK_MONOTONIC = 1
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time_t = ctypes.c_long
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elif sys.platform.startswith("netbsd"):
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# NetBSD uses function renaming for ABI versioning. While the proper
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# way to get the appropriate version is of course "#include <time.h>",
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# it is difficult with ctypes. The following is appropriate for
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# recent versions of NetBSD, including NetBSD-6.
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LIBRT = 'libc.so.12'
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clock_gettime_name = '__clock_gettime50'
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CLOCK_MONOTONIC = 3
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time_t = ctypes.c_int64
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elif sys.platform.startswith("freebsd"):
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CLOCK_MONOTONIC = 4
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time_t = ctypes.c_int64
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else:
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raise Exception
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class timespec(ctypes.Structure):
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_fields_ = [
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('tv_sec', time_t),
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('tv_nsec', ctypes.c_long),
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]
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librt = ctypes.CDLL(LIBRT)
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clock_gettime = getattr(librt, clock_gettime_name)
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clock_gettime.argtypes = [ctypes.c_int, ctypes.POINTER(timespec)]
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except:
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# Librt shared library could not be loaded
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librt = None
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def monotonic():
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if not librt:
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return time.time()
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t = timespec()
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if clock_gettime(CLOCK_MONOTONIC, ctypes.pointer(t)) == 0:
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return t.tv_sec + t.tv_nsec * 1e-9
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# Kernel does not support CLOCK_MONOTONIC
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return time.time()
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# Use time.monotonic() if Python version >= 3.3
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if not hasattr(time, 'monotonic'):
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time.monotonic = monotonic
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def msec():
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""" Returns the system's monotonic time if possible, otherwise returns the
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current time as the amount of time since the epoch, in milliseconds, as a
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float."""
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return time.monotonic() * 1000.0
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def postfork():
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# Just a stub for now
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pass
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