Merge SOC2009_FSWATCHER branch into trunk.

Merges everything from the branch with only some minor changes, mostly renamed
wxUSE_FSWATCHER_{INOTIFY,KQUEUE} to wxHAS_{INOTIFY,KQUEUE}.

Add wxFileSystemWatcher and related classes.

Also introduces wxEventLoopSource.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@62474 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/unix/private/fswatcher_inotify.h

@@ -0,0 +1,71 @@
+/////////////////////////////////////////////////////////////////////////////
+// Name:        wx/unix/private/fswatcher_inotify.h
+// Purpose:     File system watcher impl classes
+// Author:      Bartosz Bekier
+// Created:     2009-05-26
+// RCS-ID:      $Id$
+// Copyright:   (c) 2009 Bartosz Bekier <bartosz.bekier@gmail.com>
+// Licence:     wxWindows licence
+/////////////////////////////////////////////////////////////////////////////
+
+#ifndef WX_UNIX_PRIVATE_FSWATCHER_INOTIFY_H_
+#define WX_UNIX_PRIVATE_FSWATCHER_INOTIFY_H_
+
+#include "wx/filename.h"
+
+// ============================================================================
+// wxFSWatcherEntry implementation & helper declarations
+// ============================================================================
+
+class wxFSWatcherImplUNIX;
+
+class wxFSWatchEntry : public wxFSWatchInfo
+{
+public:
+    wxFSWatchEntry(const wxFSWatchInfo& winfo) :
+        wxFSWatchInfo(winfo)
+    {
+    }
+
+    int GetWatchDescriptor() const
+    {
+        return m_wd;
+    }
+
+    void SetWatchDescriptor(int wd)
+    {
+        m_wd = wd;
+    }
+
+private:
+    int m_wd;
+
+    wxDECLARE_NO_COPY_CLASS(wxFSWatchEntry);
+};
+
+
+// ============================================================================
+// wxFSWSourceHandler helper class
+// ============================================================================
+
+class wxFSWatcherImplUnix;
+
+/**
+ * Handler for handling i/o from inotify descriptor
+ */
+class wxFSWSourceHandler : public wxEventLoopSourceHandler
+{
+public:
+    wxFSWSourceHandler(wxFSWatcherImplUnix* service) :
+        m_service(service)
+    {  }
+
+    virtual void OnReadWaiting();
+    virtual void OnWriteWaiting();
+    virtual void OnExceptionWaiting();
+
+protected:
+    wxFSWatcherImplUnix* m_service;
+};
+
+#endif /* WX_UNIX_PRIVATE_FSWATCHER_INOTIFY_H_ */