Am Donnerstag, 3. Juli 2014 15:54:41 UTC+2 schrieb Jeremy Ruston:
>
> The trouble with trying to use a lockfile with TiddlyWiki is that we don't
> have atomic file operations.
>
Is renaming a file atomic? If so, we have at least one means which could
work.
We need to define a lockfile which must exist in order to be able to get a
lock. I'd do it like this:
my_lock= lockfilename + SomeRandomNumberOrProcessID
while not rename lockfilename to my_lock
if no more retries allowed -> Couldn't get lock
sleep a while
end while
Got the lock
do something
rename my_lock to lockfilename
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