| // Copyright 2014 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include "ui/gfx/x/x11_error_tracker.h" |
| |
| #include "base/logging.h" |
| #include "ui/gfx/x/x11_types.h" |
| |
| namespace { |
| |
| unsigned char g_x11_error_code = 0; |
| static gfx::X11ErrorTracker* g_handler = NULL; |
| |
| int X11ErrorHandler(Display* display, XErrorEvent* error) { |
| g_x11_error_code = error->error_code; |
| return 0; |
| } |
| |
| } // namespace |
| |
| namespace gfx { |
| |
| X11ErrorTracker::X11ErrorTracker() { |
| // This is a non-exhaustive check for incorrect usage. It disallows nested |
| // X11ErrorTracker instances on the same thread. |
| DCHECK(g_handler == NULL); |
| g_handler = this; |
| XSync(GetXDisplay(), False); |
| old_handler_ = XSetErrorHandler(X11ErrorHandler); |
| g_x11_error_code = 0; |
| } |
| |
| X11ErrorTracker::~X11ErrorTracker() { |
| g_handler = NULL; |
| XSetErrorHandler(old_handler_); |
| } |
| |
| bool X11ErrorTracker::FoundNewError() { |
| XSync(GetXDisplay(), False); |
| unsigned char error = g_x11_error_code; |
| g_x11_error_code = 0; |
| return error != 0; |
| } |
| |
| } // namespace gfx |