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| author |  Joey Hess <joey@kitenet.net> | 2012-06-19 02:23:45 -0400 |
|---|---|---|
| committer | Joey Hess <joey@kitenet.net> | 2012-06-19 02:23:45 -0400 |
| commit | 4ab9449cee0cb1377a768b44fe832282ac1f88b9 (patch) | |
| tree | be31b9413f1f8f938890fc8006cc833ae51ea9d0 /Utility/DirWatcher.hs | |
| parent | fd3e94593224fe0e656c7bb1dc117db057575f4e (diff) | |
add eventsCoalesce
Diffstat (limited to 'Utility/DirWatcher.hs')
| -rw-r--r-- | Utility/DirWatcher.hs | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/Utility/DirWatcher.hs b/Utility/DirWatcher.hs index 575036190..bf184ff8a 100644 --- a/Utility/DirWatcher.hs +++ b/Utility/DirWatcher.hs @@ -35,6 +35,24 @@ canWatch = True canWatch = False #endif +/* With inotify, discrete events will be received when making multiple changes + * to the same filename. For example, adding it, deleting it, and adding it + * again will be three events. + * + * OTOH, with kqueue, often only one event is received, indicating the most + * recent state of the file. + */ +eventsCoalesce :: Bool +#if WITH_INOTIFY +eventsCoalesce = False +#else +#if WITH_KQUEUE +eventsCoalesce = True +#else +eventsCoalesce = undefined +#endif +#endif + #if WITH_INOTIFY watchDir :: FilePath -> Pruner -> WatchHooks -> (IO () -> IO ()) -> IO () watchDir dir prune hooks runstartup = INotify.withINotify $ \i -> do |