[Gtk2hs-commit] (main branch): change gdk_threads_enter import from unsafe to safe

[Daniel W. <dm...@lu...>]

diffing dir...
Sun Jun  3 00:58:22 BST 2012  Daniel Wagner <da...@wa...>
  * change gdk_threads_enter import from unsafe to safe
  Ignore-this: cae9259155505b623b1afe09f4df2143
  
  Safe imports have two uses: when a function may call back into Haskell, it must
  be marked safe; and when a function may block (or take a long time to compute),
  it may be marked safe to avoid blocking all other Haskell threads from making
  progress. The cost of marking a function safe is decreased (serial)
  performance.
  
  Since the typical use case for gdk_threads_enter is to grab a lock in
  concurrent code, it is important to ensure that other Haskell threads can make
  progress -- especially since one of them may be holding the lock.
  
    hunk ./gtk/Graphics/UI/Gtk/General/General.chs 205
    -{#fun unsafe gdk_threads_enter as threadsEnter {} -> `()' #}
    +{#fun gdk_threads_enter as threadsEnter {} -> `()' #}