1 files changed, 100 insertions, 0 deletions
diff --git a/powerline/lib/monotonic.py b/powerline/lib/monotonic.py
new file mode 100644
index 0000000..cd7c414
--- /dev/null
+++ b/powerline/lib/monotonic.py
@@ -0,0 +1,100 @@
+# vim:fileencoding=utf-8:noet
+from __future__ import (unicode_literals, division, absolute_import, print_function)
+
+try:
+	try:
+		# >=python-3.3, Unix
+		from time import clock_gettime
+		try:
+			# >={kernel}-sources-2.6.28
+			from time import CLOCK_MONOTONIC_RAW as CLOCK_ID
+		except ImportError:
+			from time import CLOCK_MONOTONIC as CLOCK_ID
+
+		monotonic = lambda: clock_gettime(CLOCK_ID)
+	except ImportError:
+		# >=python-3.3
+		from time import monotonic
+except ImportError:
+	import ctypes
+	import sys
+
+	try:
+		if sys.platform == 'win32':
+			# Windows only
+			GetTickCount64 = ctypes.windll.kernel32.GetTickCount64
+			GetTickCount64.restype = ctypes.c_ulonglong
+
+			def monotonic():
+				return GetTickCount64() / 1000
+
+		elif sys.platform == 'darwin':
+			# Mac OS X
+			from ctypes.util import find_library
+
+			libc_name = find_library('c')
+			if not libc_name:
+				raise OSError
+
+			libc = ctypes.CDLL(libc_name, use_errno=True)
+
+			mach_absolute_time = libc.mach_absolute_time
+			mach_absolute_time.argtypes = ()
+			mach_absolute_time.restype = ctypes.c_uint64
+
+			class mach_timebase_info_data_t(ctypes.Structure):
+				_fields_ = (
+					('numer', ctypes.c_uint32),
+					('denom', ctypes.c_uint32),
+				)
+			mach_timebase_info_data_p = ctypes.POINTER(mach_timebase_info_data_t)
+
+			_mach_timebase_info = libc.mach_timebase_info
+			_mach_timebase_info.argtypes = (mach_timebase_info_data_p,)
+			_mach_timebase_info.restype = ctypes.c_int
+
+			def mach_timebase_info():
+				timebase = mach_timebase_info_data_t()
+				_mach_timebase_info(ctypes.byref(timebase))
+				return (timebase.numer, timebase.denom)
+
+			timebase = mach_timebase_info()
+			factor = timebase[0] / timebase[1] * 1e-9
+
+			def monotonic():
+				return mach_absolute_time() * factor
+		else:
+			# linux only (no librt on OS X)
+			import os
+
+			# See <bits/time.h>
+			CLOCK_MONOTONIC = 1
+			CLOCK_MONOTONIC_RAW = 4
+
+			class timespec(ctypes.Structure):
+				_fields_ = (
+					('tv_sec', ctypes.c_long),
+					('tv_nsec', ctypes.c_long)
+				)
+			tspec = timespec()
+
+			librt = ctypes.CDLL('librt.so.1', use_errno=True)
+			clock_gettime = librt.clock_gettime
+			clock_gettime.argtypes = [ctypes.c_int, ctypes.POINTER(timespec)]
+
+			if clock_gettime(CLOCK_MONOTONIC_RAW, ctypes.pointer(tspec)) == 0:
+				# >={kernel}-sources-2.6.28
+				clock_id = CLOCK_MONOTONIC_RAW
+			elif clock_gettime(CLOCK_MONOTONIC, ctypes.pointer(tspec)) == 0:
+				clock_id = CLOCK_MONOTONIC
+			else:
+				raise OSError
+
+			def monotonic():
+				if clock_gettime(CLOCK_MONOTONIC, ctypes.pointer(tspec)) != 0:
+					errno_ = ctypes.get_errno()
+					raise OSError(errno_, os.strerror(errno_))
+				return tspec.tv_sec + tspec.tv_nsec / 1e9
+
+	except:
+		from time import time as monotonic  # NOQA