[glib] (10 commits) ...Merge branch 'more-atomic-ops' into 'main'

[Philip Withnall <pwithnall src gnome org>]

Summary of changes:

  6219292... gio/tests: Add tests for cancellable pollfd and cancellatio
  e218371... gio/tests: Ensure that cancellable is cancelled when emitti
  e7269a2... gio/tests: Ensure that a cancellable hangs if reset from ca
  920f54e... gatomicarray: Use atomic exchange for data value
  576e5f2... cancellable: Use more atomic exchanges operations
  9c32cfb... gfileattribute: Do atomic addition before checking the old 
  bfd7769... gresource: Use atomic pointer exchange operations to nullif
  2c322f2... gmain: Do atomic addition before checking the old value on 
  00f3f0d... gthread: Use atomic pointer exchange to check value set on 
  55928d6... Merge branch 'more-atomic-ops' into 'main'