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__all__ = ["monotonic_time"]
import ctypes, 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 (t.tv_sec, t.tv_nsec, t.tv_sec + t.tv_nsec * 1e-9)
#return t.tv_sec
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