Initial commit

win/rfb_win32/EventManager.cxx

@@ -0,0 +1,103 @@
+/* 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.
+ */
+
+#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 0;
+}
+
+BOOL EventManager::getMessage(MSG* msg, HWND hwnd, UINT minMsg, UINT maxMsg) {
+  while (true) {
+    // - Process any pending timeouts
+    DWORD 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) && (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;
+    }
+  }
+}