netdata/python.d/python_modules/bases/monotonic.py at master · chih7/netdata · GitHub

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# thx to https://stackoverflow.com/a/1205762

import ctypes

# import os

CLOCK_MONOTONIC = 1 # see <linux/time.h>

class _Timespec(ctypes.Structure):

_fields_ = [

('tv_sec', ctypes.c_long),

('tv_nsec', ctypes.c_long)

]

_librt = ctypes.CDLL('librt.so.1', use_errno=True)

_clock_gettime = _librt.clock_gettime

_clock_gettime.argtypes = [ctypes.c_int, ctypes.POINTER(_Timespec)]

def time():

t = _Timespec()

if _clock_gettime(CLOCK_MONOTONIC, ctypes.pointer(t)) != 0:

# errno_ = ctypes.get_errno()

# raise OSError(errno_, os.strerror(errno_))

return None

return t.tv_sec + t.tv_nsec * 1e-9

AVAILABLE = bool(time())

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