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/private/fswatcher.h

@@ -0,0 +1,92 @@
+/////////////////////////////////////////////////////////////////////////////
+// Name:        wx/private/fswatcher.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_PRIVATE_FSWATCHER_H_
+#define WX_PRIVATE_FSWATCHER_H_
+
+#include "wx/sharedptr.h"
+
+#ifdef wxHAS_INOTIFY
+    class wxFSWatchEntryUnix;
+    #define wxFSWatchEntry wxFSWatchEntryUnix
+    WX_DECLARE_STRING_HASH_MAP(wxSharedPtr<wxFSWatchEntry>,wxFSWatchEntries);
+    #include "wx/unix/private/fswatcher_inotify.h"
+#elif defined(wxHAS_KQUEUE)
+    class wxFSWatchEntryKq;
+    #define wxFSWatchEntry wxFSWatchEntryKq
+    WX_DECLARE_STRING_HASH_MAP(wxSharedPtr<wxFSWatchEntry>,wxFSWatchEntries);
+    #include "wx/unix/private/fswatcher_kqueue.h"
+#elif defined(__WXMSW__)
+    class wxFSWatchEntryMSW;
+    #define wxFSWatchEntry wxFSWatchEntryMSW
+    WX_DECLARE_STRING_HASH_MAP(wxSharedPtr<wxFSWatchEntry>,wxFSWatchEntries);
+    #include "wx/msw/private/fswatcher.h"
+#else
+    #define wxFSWatchEntry wxFSWatchEntryPolling
+#endif
+
+class wxFSWatcherImpl
+{
+public:
+    wxFSWatcherImpl(wxFileSystemWatcherBase* watcher) :
+        m_watcher(watcher)
+    {
+    }
+
+    virtual ~wxFSWatcherImpl()
+    {
+        (void) RemoveAll();
+    }
+
+    virtual bool Init() = 0;
+
+    virtual bool Add(const wxFSWatchInfo& winfo)
+    {
+        wxCHECK_MSG( m_watches.find(winfo.GetPath()) == m_watches.end(), false,
+                     "Path '%s' is already watched");
+
+        // conctruct watch entry
+        wxSharedPtr<wxFSWatchEntry> watch(new wxFSWatchEntry(winfo));
+
+        if (!DoAdd(watch))
+            return false;
+
+        // add watch to our map (always succeedes, checked above)
+        wxFSWatchEntries::value_type val(watch->GetPath(), watch);
+        return m_watches.insert(val).second;
+    }
+
+    virtual bool Remove(const wxFSWatchInfo& winfo)
+    {
+        wxFSWatchEntries::iterator it = m_watches.find(winfo.GetPath());
+        wxCHECK_MSG( it != m_watches.end(), false, "Path '%s' is not watched");
+
+        wxSharedPtr<wxFSWatchEntry> watch = it->second;
+        m_watches.erase(it);
+        return DoRemove(watch);
+    }
+
+    virtual bool RemoveAll()
+    {
+        m_watches.clear();
+        return true;
+    }
+
+protected:
+    virtual bool DoAdd(wxSharedPtr<wxFSWatchEntry> watch) = 0;
+
+    virtual bool DoRemove(wxSharedPtr<wxFSWatchEntry> watch) = 0;
+
+    wxFSWatchEntries m_watches;
+    wxFileSystemWatcherBase* m_watcher;
+};
+
+
+#endif /* WX_PRIVATE_FSWATCHER_H_ */