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 19 namespace webrtc { 20 21 namespace { 22 23 #if !defined(TOOLKIT_GTK) 24 25 // TODO(sergeyu): This code is not thread safe. Fix it. Bug 2202. 26 static bool g_xserver_error_trap_enabled = false; 27 static int g_last_xserver_error_code = 0; 28 29 int 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 39 XErrorTrap::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 52 int 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 64 XErrorTrap::~XErrorTrap() { 65 if (enabled_) 66 GetLastErrorAndDisable(); 67 } 68 69 } // namespace webrtc 70
