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_kqueue.h

@@ -0,0 +1,134 @@
+/////////////////////////////////////////////////////////////////////////////
+// Name:        wx/unix/private/fswatcher_kqueue.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_KQUEUE_H_
+#define WX_UNIX_PRIVATE_FSWATCHER_KQUEUE_H_
+
+#include <fcntl.h>
+#include <unistd.h>
+#include "wx/dir.h"
+#include "wx/debug.h"
+#include "wx/arrstr.h"
+
+// ============================================================================
+// wxFSWatcherEntry implementation & helper declarations
+// ============================================================================
+
+class wxFSWatcherImplKqueue;
+
+class wxFSWatchEntryKq : public wxFSWatchInfo
+{
+public:
+    struct wxDirState
+    {
+        wxDirState(const wxFSWatchInfo& winfo)
+        {
+            if (!wxDir::Exists(winfo.GetPath()))
+                return;
+
+            wxDir dir(winfo.GetPath());
+            wxCHECK_RET( dir.IsOpened(),
+                  wxString::Format("Unable to open dir '%s'", winfo.GetPath()));
+
+            wxString filename;
+            bool ret = dir.GetFirst(&filename);
+            while (ret)
+            {
+                files.push_back(filename);
+                ret = dir.GetNext(&filename);
+            }
+        }
+
+        wxSortedArrayString files;
+    };
+
+    wxFSWatchEntryKq(const wxFSWatchInfo& winfo) :
+        wxFSWatchInfo(winfo), m_lastState(winfo)
+    {
+        m_fd = wxOpen(m_path, O_RDONLY, 0);
+        if (m_fd == -1)
+        {
+            wxLogSysError(_("Unable to open path '%s'"), m_path);
+        }
+    }
+
+    virtual ~wxFSWatchEntryKq()
+    {
+        (void) Close();
+    }
+
+    bool Close()
+    {
+        if (!IsOk())
+            return false;
+
+        int ret = close(m_fd);
+        if (ret == -1)
+        {
+            wxLogSysError(_("Unable to close path '%s'"), m_path);
+        }
+        m_fd = -1;
+
+        return ret != -1;
+    }
+
+    bool IsOk() const
+    {
+        return m_fd != -1;
+    }
+
+    int GetFileDescriptor() const
+    {
+        return m_fd;
+    }
+
+    void RefreshState()
+    {
+        m_lastState = wxDirState(*this);
+    }
+
+    const wxDirState& GetLastState() const
+    {
+        return m_lastState;
+    }
+
+private:
+    int m_fd;
+    wxDirState m_lastState;
+
+    wxDECLARE_NO_COPY_CLASS(wxFSWatchEntryKq);
+};
+
+
+// ============================================================================
+// wxFSWSourceHandler helper class
+// ============================================================================
+
+class wxFSWatcherImplKqueue;
+
+/**
+ * Handler for handling i/o from inotify descriptor
+ */
+class wxFSWSourceHandler : public wxEventLoopSourceHandler
+{
+public:
+    wxFSWSourceHandler(wxFSWatcherImplKqueue* service) :
+        m_service(service)
+    {  }
+
+    virtual void OnReadWaiting();
+    virtual void OnWriteWaiting();
+    virtual void OnExceptionWaiting();
+
+protected:
+    wxFSWatcherImplKqueue* m_service;
+};
+
+#endif /* WX_UNIX_PRIVATE_FSWATCHER_KQUEUE_H_ */