1 // Copyright (c) 2012 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 #include "remoting/host/linux/x11_util.h" 6 7 #include "base/bind.h" 8 9 namespace remoting { 10 11 static ScopedXErrorHandler* g_handler = NULL; 12 13 ScopedXErrorHandler::ScopedXErrorHandler(const Handler& handler): 14 handler_(handler), 15 ok_(true) { 16 // This is a poor-man's check for incorrect usage. It doesn't handle the case 17 // where a mix of ScopedXErrorHandler and raw XSetErrorHandler calls are used, 18 // and it disallows nested ScopedXErrorHandlers on the same thread, despite 19 // these being perfectly safe. 20 DCHECK(g_handler == NULL); 21 g_handler = this; 22 previous_handler_ = XSetErrorHandler(HandleXErrors); 23 } 24 25 ScopedXErrorHandler::~ScopedXErrorHandler() { 26 g_handler = NULL; 27 XSetErrorHandler(previous_handler_); 28 } 29 30 namespace { 31 void IgnoreXErrors(Display* display, XErrorEvent* error) {} 32 } // namespace 33 34 // Static 35 ScopedXErrorHandler::Handler ScopedXErrorHandler::Ignore() { 36 return base::Bind(IgnoreXErrors); 37 } 38 39 int ScopedXErrorHandler::HandleXErrors(Display* display, XErrorEvent* error) { 40 DCHECK(g_handler != NULL); 41 g_handler->ok_ = false; 42 g_handler->handler_.Run(display, error); 43 return 0; 44 } 45 46 47 ScopedXGrabServer::ScopedXGrabServer(Display* display) 48 : display_(display) { 49 XGrabServer(display_); 50 } 51 52 ScopedXGrabServer::~ScopedXGrabServer() { 53 XUngrabServer(display_); 54 XFlush(display_); 55 } 56 57 } // namespace remoting 58
