Distingush callback function names from other uses of "callback".

git-svn-id: svn://daper.net/moc/trunk@2721 910807d9-36e0-0310-a014-e9ea483e2ba4
Give mutex names a consistant suffix.

git-svn-id: svn://daper.net/moc/trunk@2722 910807d9-36e0-0310-a014-e9ea483e2ba4
Rename variables and parameters to make their units clear.

git-svn-id: svn://daper.net/moc/trunk@2723 910807d9-36e0-0310-a014-e9ea483e2ba4
Rename variables to make their units clear.

git-svn-id: svn://daper.net/moc/trunk@2724 910807d9-36e0-0310-a014-e9ea483e2ba4