Rather than storing your count in a file, I'd store it in a file's name.
Create a directory, and create a single file in that directory who's name is the count. Provided the directory is local, rename is atomic without additional locking.
With the rise and rise of 'Social' network sites: 'Computers are making people easier to use everyday'
Examine what is said, not who speaks -- Silence betokens consent -- Love the truth but pardon error.
"Science is about questioning the status quo. Questioning authority".
In the absence of evidence, opinion is indistinguishable from prejudice.