WIN refactor ImplSalYield

While looking for some reason for multiple ABORTED Jenkins runs,
presumely due to unprocessed Idles, I found the ImplSalYield code
way too hard to follow, so this restructures the PeekMessage loop
and adds some better comments to make that easier.

We now bail out a bit earlier in m_nNoYieldLock mode and also
account for eventual tick wraps in single message mode, which
isn't needed, as we already just process one message, but it
removes additional conditions and further simplifies the code.
We also now explicitly report GetMessageW non-message return
codes.

Change-Id: Ibd745d5540dd9998570ece9aeb0d37886b627eb7
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/110042
Tested-by: Jenkins
Reviewed-by: Jan-Marek Glogowski <glogow@fbihome.de>

0 files changed, 0 insertions, 0 deletions