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A Unix timestamp with optional nanoseconds precision,
modulo 2**31 seconds.
A 3-tuple containing:
`truncated_seconds`: seconds since the Unix epoch,
truncated to its lower 31 bits
`subsecond_nanoseconds`: number of nanoseconds since `truncated_seconds`.
When this is zero, the sub-second precision is considered unknown.
`second_ambiguous`: whether this timestamp is still "reliable"
(see `reliable_mtime_of`) if we drop its sub-second component.
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r r c � � U R 5 u p [ [ R " U5 5 [ R " U5 U R U5 $ ! [ R " U5 U R U5 f = f)zvreturn a timestamp for "now" in the current vfs
This will raise an exception if no temporary files could be created.
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Returns the `timestamp` at the Unix epoch.
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Takes an `os.stat_result`-like object and returns a `timestamp` object
for its modification time.
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SU- : a g U $ U $ )a Same as `mtime_of`, but return `None` or a `Timestamp` with
`second_ambiguous` set if the date might be ambiguous.
A modification time is reliable if it is older than "present_time" (or
sufficiently in the future).
Otherwise a concurrent modification might happens with the same mtime.
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[ :� a US4$ [ U 5 nUS US :X a US US :X a MI US4$ ! [ a gf = f)aP Wait until the next update from the filesystem time by writing in a loop
a new temporary file inside the working directory and checking if its time
differs from the first one observed.
Returns `None` if we are unable to get the filesystem time,
`(timestamp, True)` if we've timed out waiting for the filesystem clock
to tick, and `(timestamp, False)` if we've waited successfully.
On Linux, your average tick is going to be a "jiffy", or 1/HZ.
HZ is your kernel's tick rate (if it has one configured) and the value
is the one returned by `grep 'CONFIG_HZ=' /boot/config-$(uname -r)`,
again assuming a normal setup.
In my case (Alphare) at the time of writing, I get `CONFIG_HZ=250`,
which equates to 4ms.
This might change with a series that could make it to Linux 6.12:
https://lore.kernel.org/all/20241002-mgtime-v10-8-d1c4717f5284@kernel.org
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