847791 - Make sessionstore.js backup atomic on Windows using hard links.

Status: RESOLVED DUPLICATE of bug 833286

(Firefox :: Session Restore, defect)

Description

[Yura Zenevich [:yzen] (please use "needinfo")]

This bug is the same as Bug 833286 but is specific only to Windows platform. 
It requires some investigation into using hard link functionality on windows and determining whether it can be considered stable for this purpose.

In case it is, the backup of sesssionstore.js file should happen through the same steps as described in Bug 833286.

When writing for the first time to the sessionstore.js file:
* create a hardlink pointing to sessionstore.js, calling it sessionstore.bak;
* write data to sessionstore.js.tmp;
* finally, rename sessionstore.js.tmp to sessionstore.js.

Comment 1

[David Teller [:Yoric] - still alive but not very active]

Now that we have landed Bug 833286, this one isn't needed anymore.