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