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Author vstinner
Recipients Arfrever, larry, pitrou, skrah, trent, vstinner
Date 2012-12-04.08:46:58
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Message-id <>
I didn't read the whole issue, but the following code makes sense.

+    import posix
+except ImportError:
+    # Windows has nanosecond utime resolution.
+    UTIME_EPSILON = 2e-9
+    import sysconfig
+    if 'HAVE_UTIMENSAT' in posix._have_functions:
+        UTIME_EPSILON = 2e-9
+    elif 'HAVE_UTIMES' in sysconfig.get_config_vars():
+        UTIME_EPSILON = 2e-6
+    else:
+        UTIME_EPSILON = 1.0

Windows doesn't really have nanosecond resolution: the common Windows unit is 100 ns. See GetFileInformationByHandle() documentation: its BY_HANDLE_FILE_INFORMATION  structure has FILETIME fields, and FILETIME uses the 100 ns unit.

We might expose this unit (UTIME_EPSILON, in the os module maybe?) as we done for time function with time.get_clock_info().
Date User Action Args
2012-12-04 08:46:58vstinnersetrecipients: + vstinner, pitrou, larry, trent, Arfrever, skrah
2012-12-04 08:46:58vstinnersetmessageid: <>
2012-12-04 08:46:58vstinnerlinkissue15745 messages
2012-12-04 08:46:58vstinnercreate