changes should use a channel to update files atomically

[butonic]

to get rid of the mutex we should use a channel to queue writes and reads to the data.

see owncloud/ocis-accounts#82 and owncloud/ocis-accounts#72

[jvillafanez]

I don't see a big benefit from the change. From my point of view, it's a different way to do the same thing, which is serializing all the reads and writes.

Using RLock and RUnlock should perform better since read requests won't block unless there is a write request (Lock/Unlock) ongoing. This allows reading data from multiple requests in parallel and without blocking eachother. Basically, reads should use RLock/RUnlock while writes should use Lock/Unlock.
The only point that it isn't clear from the docs is if it's possible to have a write starvation if read requests keep coming.

[phil-davis]

@butonic this is an old issue that was transferred from the archived ocis-accounts repo a few weeks ago.
Please close if no longer relevant.

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed in 10 days if no further activity occurs. Thank you for your contributions.

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed in 10 days if no further activity occurs. Thank you for your contributions.