1/*
2 *  Copyright (c) 2013 The WebRTC project authors. All Rights Reserved.
3 *
4 *  Use of this source code is governed by a BSD-style license
5 *  that can be found in the LICENSE file in the root of the source
6 *  tree. An additional intellectual property rights grant can be found
7 *  in the file PATENTS.  All contributing project authors may
8 *  be found in the AUTHORS file in the root of the source tree.
9 */
10
11#include "webrtc/modules/desktop_capture/x11/x_error_trap.h"
12
13#include <assert.h>
14
15#if defined(TOOLKIT_GTK)
16#include <gdk/gdk.h>
17#endif  // !defined(TOOLKIT_GTK)
18
19namespace webrtc {
20
21namespace {
22
23#if !defined(TOOLKIT_GTK)
24
25// TODO(sergeyu): This code is not thread safe. Fix it. Bug 2202.
26static bool g_xserver_error_trap_enabled = false;
27static int g_last_xserver_error_code = 0;
28
29int XServerErrorHandler(Display* display, XErrorEvent* error_event) {
30  assert(g_xserver_error_trap_enabled);
31  g_last_xserver_error_code = error_event->error_code;
32  return 0;
33}
34
35#endif  // !defined(TOOLKIT_GTK)
36
37}  // namespace
38
39XErrorTrap::XErrorTrap(Display* display)
40    : original_error_handler_(NULL),
41      enabled_(true) {
42#if defined(TOOLKIT_GTK)
43  gdk_error_trap_push();
44#else  // !defined(TOOLKIT_GTK)
45  assert(!g_xserver_error_trap_enabled);
46  original_error_handler_ = XSetErrorHandler(&XServerErrorHandler);
47  g_xserver_error_trap_enabled = true;
48  g_last_xserver_error_code = 0;
49#endif  // !defined(TOOLKIT_GTK)
50}
51
52int XErrorTrap::GetLastErrorAndDisable() {
53  enabled_ = false;
54#if defined(TOOLKIT_GTK)
55  return gdk_error_trap_push();
56#else  // !defined(TOOLKIT_GTK)
57  assert(g_xserver_error_trap_enabled);
58  XSetErrorHandler(original_error_handler_);
59  g_xserver_error_trap_enabled = false;
60  return g_last_xserver_error_code;
61#endif  // !defined(TOOLKIT_GTK)
62}
63
64XErrorTrap::~XErrorTrap() {
65  if (enabled_)
66    GetLastErrorAndDisable();
67}
68
69}  // namespace webrtc
70