mirror of
https://github.com/TigerVNC/tigervnc.git
synced 2024-08-21 05:58:01 +02:00
47ed8d321c
git-svn-id: svn://svn.code.sf.net/p/tigervnc/code/trunk@2 3789f03b-4d11-0410-bbf8-ca57d06f2519
247 lines
7.5 KiB
C++
247 lines
7.5 KiB
C++
/* Copyright (C) 2002-2004 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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// -=- SocketManager.cxx
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#define WIN32_LEAN_AND_MEAN
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#include <winsock2.h>
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#include <assert.h>
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#include <rfb/LogWriter.h>
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#include <rfb_win32/SocketManager.h>
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using namespace rfb;
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using namespace rfb::win32;
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static LogWriter vlog("SocketManager");
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// -=- SocketManager
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SocketManager::SocketManager() : sockets(0), events(0), nSockets(0), nAvail(0) {
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}
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SocketManager::~SocketManager() {
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for (int i=0; i<nSockets; i++) {
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if (!sockets[i].is_event)
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WSACloseEvent(events[i]);
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}
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delete [] events;
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delete [] sockets;
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}
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void SocketManager::addListener(network::SocketListener* sock_, network::SocketServer* srvr) {
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WSAEVENT event = WSACreateEvent();
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assert(event != WSA_INVALID_EVENT);
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addListener(sock_, event, srvr);
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}
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void SocketManager::addSocket(network::Socket* sock_, network::SocketServer* srvr) {
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WSAEVENT event = WSACreateEvent();
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assert(event != WSA_INVALID_EVENT);
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addSocket(sock_, event, srvr);
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}
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BOOL SocketManager::getMessage(MSG* msg, HWND hwnd, UINT minMsg, UINT maxMsg) {
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while (true) {
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// First check for idle timeout
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network::SocketServer* server = 0;
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int timeout = 0;
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for (int i=0; i<nSockets; i++) {
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if (!sockets[i].is_event &&
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sockets[i].server != server) {
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server = sockets[i].server;
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int t = server->checkTimeouts();
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if (t > 0 && (timeout == 0 || t < timeout))
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timeout = t;
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}
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}
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if (timeout == 0)
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timeout = INFINITE;
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// - Network IO is less common than messages - process it first
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DWORD result;
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if (nSockets) {
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result = WaitForMultipleObjects(nSockets, events, FALSE, 0);
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if (result == WAIT_TIMEOUT) {
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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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result = MsgWaitForMultipleObjects(nSockets, events, FALSE, timeout,
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QS_ALLINPUT);
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if (result == WAIT_OBJECT_0 + nSockets) {
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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 + nSockets))) {
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int index = result - WAIT_OBJECT_0;
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// - Process a socket event
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if (sockets[index].is_event) {
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// Process a general Win32 event
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// NB: The handler must reset the event!
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if (!sockets[index].handler->processEvent(events[index])) {
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removeSocket(index);
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continue;
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}
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} else if (sockets[index].is_conn) {
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// Process data from an active connection
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// Cancel event notification for this socket
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if (WSAEventSelect(sockets[index].fd, events[index], 0) == SOCKET_ERROR)
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vlog.info("unable to disable WSAEventSelect:%u", WSAGetLastError());
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// Reset the event object
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WSAResetEvent(events[index]);
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// Call the socket server to process the event
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if (!sockets[index].server->processSocketEvent(sockets[index].sock.conn)) {
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removeSocket(index);
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continue;
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}
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// Re-instate the required socket event
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// If the read event is still valid, the event object gets set here
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if (WSAEventSelect(sockets[index].fd, events[index], FD_READ | FD_CLOSE) == SOCKET_ERROR)
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throw rdr::SystemException("unable to re-enable WSAEventSelect:%u", WSAGetLastError());
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} else {
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// Accept an incoming connection
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vlog.debug("accepting incoming connection");
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// What kind of event is this?
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WSANETWORKEVENTS network_events;
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WSAEnumNetworkEvents(sockets[index].fd, events[index], &network_events);
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if (network_events.lNetworkEvents & FD_ACCEPT) {
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network::Socket* new_sock = sockets[index].sock.listener->accept();
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if (new_sock) {
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sockets[index].server->addClient(new_sock);
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addSocket(new_sock, sockets[index].server);
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}
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} else if (network_events.lNetworkEvents & FD_CLOSE) {
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vlog.info("deleting listening socket");
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network::SocketListener* s = sockets[index].sock.listener;
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removeSocket(index);
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delete s;
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} else {
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vlog.error("unknown network event for listener");
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}
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}
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} else if (result == WAIT_FAILED) {
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throw rdr::SystemException("unable to wait for events", GetLastError());
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}
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}
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}
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void SocketManager::resizeArrays(int numSockets) {
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if (nAvail >= numSockets) return;
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while (nAvail < numSockets)
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nAvail = max(16, nAvail*2);
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SocketInfo* newinfo = new SocketInfo[nAvail];
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HANDLE* newevents = new HANDLE[nAvail];
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for (int i=0; i<nSockets; i++) {
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newinfo[i] = sockets[i];
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newevents[i] = events[i];
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}
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delete [] sockets;
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delete [] events;
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sockets = newinfo;
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events = newevents;
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}
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void SocketManager::addSocket(network::Socket* sock, HANDLE event, network::SocketServer* server) {
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resizeArrays(nSockets+1);
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sockets[nSockets].sock.conn = sock;
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sockets[nSockets].fd = sock->getFd();
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sockets[nSockets].server = server;
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events[nSockets] = event;
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sockets[nSockets].is_conn = true;
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sockets[nSockets].is_event = false;
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if (WSAEventSelect(sock->getFd(), event, FD_READ | FD_CLOSE) == SOCKET_ERROR)
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throw rdr::SystemException("unable to select on socket", WSAGetLastError());
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nSockets++;
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}
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void SocketManager::addListener(network::SocketListener* sock, HANDLE event, network::SocketServer* server) {
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resizeArrays(nSockets+1);
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sockets[nSockets].sock.listener = sock;
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sockets[nSockets].fd = sock->getFd();
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sockets[nSockets].server = server;
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events[nSockets] = event;
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sockets[nSockets].is_conn = false;
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sockets[nSockets].is_event = false;
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if (WSAEventSelect(sock->getFd(), event, FD_ACCEPT | FD_CLOSE) == SOCKET_ERROR)
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throw rdr::SystemException("unable to select on listener", WSAGetLastError());
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nSockets++;
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}
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void SocketManager::remListener(network::SocketListener* sock) {
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for (int index=0; index<nSockets; index++) {
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if (!sockets[index].is_conn &&
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!sockets[index].is_event) {
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vlog.debug("removing listening socket");
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removeSocket(index);
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delete sock;
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}
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}
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}
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void SocketManager::addEvent(HANDLE event, EventHandler* ecb) {
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resizeArrays(nSockets+1);
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sockets[nSockets].handler = ecb;
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events[nSockets] = event;
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sockets[nSockets].is_conn = false;
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sockets[nSockets].is_event = true;
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nSockets++;
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}
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void SocketManager::removeSocket(int index) {
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if (index >= nSockets)
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throw rdr::Exception("attempting to remove unregistered socket");
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if (!sockets[index].is_event)
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WSACloseEvent(events[index]);
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for (int i=index; i<nSockets-1; i++) {
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sockets[i] = sockets[i+1];
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events[i] = events[i+1];
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}
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nSockets--;
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}
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