1 // Copyright 2014 The Chromium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #ifndef UI_GFX_X_X11_ERROR_TRACKER_H_ 6 #define UI_GFX_X_X11_ERROR_TRACKER_H_ 7 8 #include <X11/Xlib.h> 9 10 #include "base/basictypes.h" 11 #include "ui/gfx/gfx_export.h" 12 13 namespace gfx { 14 15 // X11ErrorTracker catches X11 errors in a non-fatal way. It does so by 16 // temporarily changing the X11 error handler. The old error handler is 17 // restored when the tracker is destroyed. 18 class GFX_EXPORT X11ErrorTracker { 19 public: 20 X11ErrorTracker(); 21 ~X11ErrorTracker(); 22 23 // Returns whether an X11 error happened since this function was last called 24 // (or since the creation of the tracker). This is potentially expensive, 25 // since this causes a sync with the X server. 26 bool FoundNewError(); 27 28 private: 29 XErrorHandler old_handler_; 30 31 DISALLOW_COPY_AND_ASSIGN(X11ErrorTracker); 32 }; 33 34 } // namespace gfx 35 36 #endif // UI_GFX_X_X11_ERROR_TRACKER_H_ 37