29 lines
658 B
Python
29 lines
658 B
Python
#!/usr/bin/env python
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import ctypes
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import os
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CLOCK_MONOTONIC_RAW = 4 # from <linux/time.h>
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class timespec(ctypes.Structure):
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_fields_ = [
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('tv_sec', ctypes.c_long),
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('tv_nsec', ctypes.c_long)
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]
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librt = ctypes.CDLL('librt.so.1', use_errno=True)
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clock_gettime = librt.clock_gettime
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clock_gettime.argtypes = [ctypes.c_int, ctypes.POINTER(timespec)]
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def monotonic():
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t = timespec()
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if clock_gettime(CLOCK_MONOTONIC_RAW, ctypes.pointer(t)) != 0:
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errno_ = ctypes.get_errno()
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raise OSError(errno_, os.strerror(errno_))
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return t.tv_sec + t.tv_nsec * 1e-9
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if __name__ == "__main__":
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print monotonic()
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