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https://github.com/kasmtech/KasmVNC.git
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104 lines
3.1 KiB
C++
104 lines
3.1 KiB
C++
/* Copyright (C) 2002-2005 RealVNC Ltd. All Rights Reserved.
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*
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* This is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This software is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this software; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
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* USA.
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*/
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#include <rfb_win32/EventManager.h>
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#include <rdr/Exception.h>
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#include <rfb/LogWriter.h>
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using namespace rfb;
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using namespace rfb::win32;
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static LogWriter vlog("EventManager");
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EventManager::EventManager() : eventCount(0) {
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}
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EventManager::~EventManager() {
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}
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bool EventManager::addEvent(HANDLE event, EventHandler* ecb) {
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if (eventCount >= MAXIMUM_WAIT_OBJECTS-1)
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return false;
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events[eventCount] = event;
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handlers[eventCount] = ecb;
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eventCount++;
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return true;
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}
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void EventManager::removeEvent(HANDLE event) {
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for (unsigned int i=0; i<eventCount; i++) {
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if (events[i] == event) {
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for (unsigned int j=i; j<eventCount-1; j++) {
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events[j] = events[j+1];
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handlers[j] = handlers[j+1];
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}
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eventCount--;
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return;
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}
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}
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throw rdr::Exception("Event not registered");
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}
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int EventManager::checkTimeouts() {
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return 0;
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}
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BOOL EventManager::getMessage(MSG* msg, HWND hwnd, UINT minMsg, UINT maxMsg) {
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while (true) {
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// - Process any pending timeouts
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DWORD timeout = checkTimeouts();
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if (timeout == 0)
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timeout = INFINITE;
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// - Events take precedence over messages
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DWORD result;
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if (eventCount) {
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// - Check whether any events are set
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result = WaitForMultipleObjects(eventCount, events, FALSE, 0);
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if (result == WAIT_TIMEOUT) {
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// - No events are set, so check for messages
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if (PeekMessage(msg, hwnd, minMsg, maxMsg, PM_REMOVE))
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return msg->message != WM_QUIT;
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// - Block waiting for an event to be set, or a message
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result = MsgWaitForMultipleObjects(eventCount, events, FALSE, timeout,
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QS_ALLINPUT);
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if (result == WAIT_OBJECT_0 + eventCount) {
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// - Return the message, if any
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if (PeekMessage(msg, hwnd, minMsg, maxMsg, PM_REMOVE))
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return msg->message != WM_QUIT;
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continue;
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}
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}
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} else
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return GetMessage(msg, hwnd, minMsg, maxMsg);
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if ((result >= WAIT_OBJECT_0) && (result < (WAIT_OBJECT_0 + eventCount))) {
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// - An event was set - call the handler
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int index = result - WAIT_OBJECT_0;
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handlers[index]->processEvent(events[index]);
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} else if (result == WAIT_FAILED) {
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// - An error has occurred, so return the error status code
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return -1;
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}
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}
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}
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