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553 lines
14 KiB
553 lines
14 KiB
15 years ago
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/*
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This file is part of the KDE libraries
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Copyright (C) 2005 Andreas Roth <aroth@arsoft-online.com>
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public
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License version 2 as published by the Free Software Foundation.
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This library 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 GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public License
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along with this library; see the file COPYING.LIB. If not, write to
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the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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Boston, MA 02110-1301, USA.
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*/
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#include <windows.h>
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#include <string.h>
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#include <stdlib.h>
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#include <io.h>
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#include <stdio.h>
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#include <qeventloop.h>
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#include <qapplication.h>
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#include "qeventloopex.h"
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// Local defined structures and classes (needed only for QEventLoopEx implementation)
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struct QSockNotEx
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{
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QSocketNotifier *obj;
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int fd;
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fd_set *queue;
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};
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class QSockNotTypeEx
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{
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public:
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QSockNotTypeEx();
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~QSockNotTypeEx();
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QPtrList<QSockNotEx> *list;
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fd_set select_fds;
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fd_set enabled_fds;
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fd_set pending_fds;
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};
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class QEventLoopExPrivate
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{
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public:
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QEventLoopExPrivate()
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{
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reset();
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}
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void reset() {
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m_bStopped = false;
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m_hThread = NULL;
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m_sockUpdate = 0;
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m_evPendingListEmpty = NULL;
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sn_highest = 0;
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}
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bool m_bStopped;
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HANDLE m_hThread;
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SOCKET m_sockUpdate;
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// pending socket notifiers list
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QPtrList<QSockNotEx> sn_pending_list;
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HANDLE m_evPendingListEmpty;
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CRITICAL_SECTION m_csPendingList;
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// highest fd for all socket notifiers
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int sn_highest;
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// 3 socket notifier types - read, write and exception
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QSockNotTypeEx sn_vec[3];
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CRITICAL_SECTION m_csVec;
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};
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/*****************************************************************************
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Socket notifier type
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*****************************************************************************/
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QSockNotTypeEx::QSockNotTypeEx()
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: list( 0 )
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{
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FD_ZERO( &select_fds );
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FD_ZERO( &enabled_fds );
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FD_ZERO( &pending_fds );
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}
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QSockNotTypeEx::~QSockNotTypeEx()
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{
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delete list;
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list = 0;
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}
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QEventLoopEx::QEventLoopEx( QObject *parent, const char *name) :
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QEventLoop(parent,name)
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{
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DWORD dwThreadId;
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#ifdef _DEBUG_EVENTLOOPEX
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qDebug( "QEventLoopEx::QEventLoopEx enter");
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#endif
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d = new QEventLoopExPrivate;
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InitializeCriticalSection(&d->m_csVec);
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InitializeCriticalSection(&d->m_csPendingList);
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d->m_evPendingListEmpty = CreateEvent(NULL,TRUE,FALSE,NULL);
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d->m_sockUpdate = socket(AF_INET,SOCK_DGRAM,0);
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d->m_hThread = CreateThread(NULL,0,ThreadProc,this,0,&dwThreadId);
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#ifdef _DEBUG_EVENTLOOPEX
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qDebug( "QEventLoopEx::QEventLoopEx leave");
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#endif
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}
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QEventLoopEx::~QEventLoopEx()
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{
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#ifdef _DEBUG_EVENTLOOPEX
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qDebug( "QEventLoopEx::~QEventLoopEx enter");
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#endif
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d->m_bStopped = true;
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// Ensure that you thread gets unblocked and can terminate gracefully
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SetEvent(d->m_evPendingListEmpty);
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closesocket(d->m_sockUpdate);
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WaitForSingleObject(d->m_hThread,INFINITE);
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CloseHandle(d->m_hThread);
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CloseHandle(d->m_evPendingListEmpty);
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DeleteCriticalSection(&d->m_csVec);
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DeleteCriticalSection(&d->m_csPendingList);
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delete d;
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#ifdef _DEBUG_EVENTLOOPEX
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qDebug( "QEventLoopEx::~QEventLoopEx leave");
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#endif
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}
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/*****************************************************************************
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QEventLoopEx implementations for Windows (for synchronous socket calls)
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*****************************************************************************/
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void QEventLoopEx::registerSocketNotifier( QSocketNotifier *notifier )
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{
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int sockfd = notifier->socket();
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int type = notifier->type();
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u_long n;
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DWORD dw;
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#ifdef _DEBUG_EVENTLOOPEX
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qDebug( "QSocketNotifier::registerSocketNotifier %p", notifier );
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#endif
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if(ioctlsocket(sockfd,FIONREAD,&n) == SOCKET_ERROR)
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{
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#ifdef _DEBUG_EVENTLOOPEX
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qDebug( "QSocketNotifier::registerSocketNotifier %p not a socket", notifier );
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#endif
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dw = WSAGetLastError();
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QEventLoop::registerSocketNotifier(notifier);
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return;
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}
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if ( sockfd < 0 || type < 0 || type > 2 || notifier == 0 )
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{
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#if defined(QT_CHECK_RANGE)
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qWarning( "QSocketNotifier: Internal error" );
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#endif
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return;
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}
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EnterCriticalSection(&d->m_csVec);
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QPtrList<QSockNotEx> *list = d->sn_vec[type].list;
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fd_set *fds = &d->sn_vec[type].enabled_fds;
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QSockNotEx *sn;
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if ( ! list ) {
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// create new list, the QSockNotType destructor will delete it for us
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list = new QPtrList<QSockNotEx>;
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Q_CHECK_PTR( list );
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list->setAutoDelete( TRUE );
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d->sn_vec[type].list = list;
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}
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sn = new QSockNotEx;
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Q_CHECK_PTR( sn );
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sn->obj = notifier;
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sn->fd = sockfd;
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sn->queue = &d->sn_vec[type].pending_fds;
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if ( list->isEmpty() ) {
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list->insert( 0, sn );
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} else { // sort list by fd, decreasing
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QSockNotEx *p = list->first();
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while ( p && p->fd > sockfd )
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p = list->next();
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if ( p )
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list->insert( list->at(), sn );
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else
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list->append( sn );
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}
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FD_SET( sockfd, fds );
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d->sn_highest = QMAX( d->sn_highest, sockfd );
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LeaveCriticalSection(&d->m_csVec);
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#ifdef _DEBUG_EVENTLOOPEX
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qDebug( "QSocketNotifier::signal update socket");
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#endif
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closesocket(d->m_sockUpdate);
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}
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void QEventLoopEx::unregisterSocketNotifier( QSocketNotifier *notifier )
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{
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int sockfd = notifier->socket();
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int type = notifier->type();
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if ( sockfd < 0 || type < 0 || type > 2 || notifier == 0 ) {
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#if defined(QT_CHECK_RANGE)
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qWarning( "QSocketNotifier: Internal error" );
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#endif
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return;
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}
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#ifdef _DEBUG_EVENTLOOPEX
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qDebug( "QSocketNotifier::unregisterSocketNotifier %p", notifier );
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#endif
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EnterCriticalSection(&d->m_csVec);
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QPtrList<QSockNotEx> *list = d->sn_vec[type].list;
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fd_set *fds = &d->sn_vec[type].enabled_fds;
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QSockNotEx *sn;
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if ( ! list ) {
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LeaveCriticalSection(&d->m_csVec);
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QEventLoop::unregisterSocketNotifier(notifier);
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return;
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}
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sn = list->first();
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while ( sn && !(sn->obj == notifier && sn->fd == sockfd) )
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sn = list->next();
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if ( !sn ) {// not found
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LeaveCriticalSection(&d->m_csVec);
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QEventLoop::unregisterSocketNotifier(notifier);
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return;
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}
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FD_CLR( sockfd, fds ); // clear fd bit
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FD_CLR( sockfd, sn->queue );
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EnterCriticalSection(&d->m_csPendingList);
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d->sn_pending_list.removeRef( sn ); // remove from activation list
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bool bNowEmpty = (d->sn_pending_list.count() == 0);
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LeaveCriticalSection(&d->m_csPendingList);
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if(bNowEmpty)
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SetEvent(d->m_evPendingListEmpty);
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list->remove(); // remove notifier found above
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if ( d->sn_highest == sockfd ) {// find highest fd
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d->sn_highest = -1;
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for ( int i=0; i<3; i++ ) {
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if ( d->sn_vec[i].list && ! d->sn_vec[i].list->isEmpty() )
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d->sn_highest = QMAX( d->sn_highest, // list is fd-sorted
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d->sn_vec[i].list->getFirst()->fd );
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}
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}
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LeaveCriticalSection(&d->m_csVec);
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#ifdef _DEBUG_EVENTLOOPEX
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qDebug( "QSocketNotifier::signal update socket");
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#endif
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closesocket(d->m_sockUpdate);
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}
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bool QEventLoopEx::processEvents( ProcessEventsFlags flags )
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{
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if(!QEventLoop::processEvents(flags))
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return false;
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activateSocketNotifiers();
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return true;
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}
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void QEventLoopEx::setSocketNotifierPending( QSocketNotifier *notifier )
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{
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int sockfd = notifier->socket();
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int type = notifier->type();
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if ( sockfd < 0 || type < 0 || type > 2 || notifier == 0 )
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{
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#if defined(QT_CHECK_RANGE)
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qWarning( "QSocketNotifier: Internal error" );
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#endif
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return;
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}
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#ifdef _DEBUG_EVENTLOOPEX
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qDebug( "QSocketNotifier::setSocketNotifierPending %p",notifier );
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#endif
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EnterCriticalSection(&d->m_csVec);
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QPtrList<QSockNotEx> *list = d->sn_vec[type].list;
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QSockNotEx *sn;
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if ( ! list )
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{
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#ifdef _DEBUG_EVENTLOOPEX
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qDebug( "QSocketNotifier::setSocketNotifierPending %p: no list",notifier );
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#endif
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LeaveCriticalSection(&d->m_csVec);
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return;
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}
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sn = list->first();
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while ( sn && !(sn->obj == notifier && sn->fd == sockfd) )
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sn = list->next();
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if ( ! sn ) { // not found
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#ifdef _DEBUG_EVENTLOOPEX
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qDebug( "QSocketNotifier::setSocketNotifierPending %p: not found",notifier );
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#endif
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LeaveCriticalSection(&d->m_csVec);
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return;
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}
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// We choose a random activation order to be more fair under high load.
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// If a constant order is used and a peer early in the list can
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// saturate the IO, it might grab our attention completely.
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// Also, if we're using a straight list, the callback routines may
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// delete other entries from the list before those other entries are
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// processed.
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EnterCriticalSection(&d->m_csPendingList);
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if ( ! FD_ISSET( sn->fd, sn->queue ) ) {
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d->sn_pending_list.insert( (rand() & 0xff) %
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(d->sn_pending_list.count()+1), sn );
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FD_SET( sn->fd, sn->queue );
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}
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LeaveCriticalSection(&d->m_csPendingList);
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LeaveCriticalSection(&d->m_csVec);
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}
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int QEventLoopEx::activateSocketNotifiers()
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{
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if ( d->sn_pending_list.isEmpty() )
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return 0; // nothing to do
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int n_act = 0;
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QEvent event( QEvent::SockAct );
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EnterCriticalSection(&d->m_csVec); // Avoid deaklock
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EnterCriticalSection(&d->m_csPendingList);
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QPtrListIterator<QSockNotEx> it( d->sn_pending_list );
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QSockNotEx *sn;
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while ( (sn=it.current()) ) {
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++it;
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d->sn_pending_list.removeRef( sn );
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if ( FD_ISSET(sn->fd, sn->queue) ) {
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FD_CLR( sn->fd, sn->queue );
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#ifdef _DEBUG_EVENTLOOPEX
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qDebug("QEventLoopEx:activateSocketNotifiers %p to object %p",sn, sn->obj);
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#endif
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QApplication::sendEvent( sn->obj, &event );
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n_act++;
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}
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}
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LeaveCriticalSection(&d->m_csPendingList);
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LeaveCriticalSection(&d->m_csVec); // Avoid deaklock
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#ifdef _DEBUG_EVENTLOOPEX
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qDebug( "QSocketNotifier::activateSocketNotifiers set m_evPendingListEmpty");
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#endif
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SetEvent(d->m_evPendingListEmpty);
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return n_act;
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}
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DWORD QEventLoopEx::ThreadProc(void * p)
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{
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QEventLoopEx * pEventLoopEx = static_cast<QEventLoopEx *>(p);
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pEventLoopEx->run();
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return 0;
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}
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void QEventLoopEx::run()
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{
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do
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{
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EnterCriticalSection(&d->m_csVec);
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// return the highest fd we can wait for input on
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if ( d->sn_highest >= 0 ) { // has socket notifier(s)
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if ( d->sn_vec[0].list && ! d->sn_vec[0].list->isEmpty() )
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d->sn_vec[0].select_fds = d->sn_vec[0].enabled_fds;
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else
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FD_ZERO( &d->sn_vec[0].select_fds );
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if ( d->sn_vec[1].list && ! d->sn_vec[1].list->isEmpty() )
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d->sn_vec[1].select_fds = d->sn_vec[1].enabled_fds;
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else
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FD_ZERO( &d->sn_vec[1].select_fds );
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if ( d->sn_vec[2].list && ! d->sn_vec[2].list->isEmpty() )
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d->sn_vec[2].select_fds = d->sn_vec[2].enabled_fds;
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else
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FD_ZERO( &d->sn_vec[2].select_fds );
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}
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else {
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FD_ZERO( &d->sn_vec[0].select_fds );
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FD_ZERO( &d->sn_vec[1].select_fds );
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FD_ZERO( &d->sn_vec[2].select_fds );
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}
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FD_SET(d->m_sockUpdate,&d->sn_vec[0].select_fds);
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d->sn_highest = QMAX(d->sn_highest,(int)d->m_sockUpdate);
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// FD_SET(m_sockUpdate,&sn_vec[1].select_fds);
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// FD_SET(m_sockUpdate,&sn_vec[2].select_fds);
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LeaveCriticalSection(&d->m_csVec);
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#ifdef _DEBUG_EVENTLOOPEX
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qDebug("QEventLoopEx: select(%d,%d, %d, %d)",sn_highest,sn_vec[0].select_fds.fd_count,sn_vec[1].select_fds.fd_count,sn_vec[2].select_fds.fd_count);
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#endif
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int nsel = select( d->sn_highest,
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&d->sn_vec[0].select_fds,
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&d->sn_vec[1].select_fds,
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&d->sn_vec[2].select_fds,
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NULL );
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#ifdef _DEBUG_EVENTLOOPEX
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qDebug("QEventLoopEx: select returned %d",nsel);
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#endif
|
||
|
if (nsel == SOCKET_ERROR) {
|
||
|
if (WSAGetLastError() == WSAENOTSOCK) {
|
||
|
|
||
|
|
||
|
// it seems a socket notifier has a bad fd... find out
|
||
|
// which one it is and disable it
|
||
|
fd_set fdset;
|
||
|
struct timeval zerotm;
|
||
|
int ret;
|
||
|
zerotm.tv_sec = zerotm.tv_usec = 0l;
|
||
|
|
||
|
FD_ZERO(&fdset);
|
||
|
FD_SET(d->m_sockUpdate, &fdset);
|
||
|
|
||
|
ret = select(d->m_sockUpdate + 1, &fdset, 0, 0, &zerotm);
|
||
|
if(ret == SOCKET_ERROR && WSAGetLastError() == WSAENOTSOCK)
|
||
|
{
|
||
|
// Update the waiting sockets
|
||
|
d->m_sockUpdate = socket(AF_INET,SOCK_DGRAM,0);
|
||
|
}
|
||
|
else
|
||
|
{
|
||
|
EnterCriticalSection(&d->m_csVec);
|
||
|
|
||
|
for (int type = 0; type < 3; ++type)
|
||
|
{
|
||
|
QPtrList<QSockNotEx> *list = d->sn_vec[type].list;
|
||
|
if (!list)
|
||
|
continue;
|
||
|
|
||
|
QSockNotEx *sn = list->first();
|
||
|
while (sn) {
|
||
|
FD_ZERO(&fdset);
|
||
|
FD_SET(sn->fd, &fdset);
|
||
|
|
||
|
|
||
|
do {
|
||
|
switch (type) {
|
||
|
case 0: // read
|
||
|
ret = select(sn->fd + 1, &fdset, 0, 0, &zerotm);
|
||
|
break;
|
||
|
case 1: // write
|
||
|
ret = select(sn->fd + 1, 0, &fdset, 0, &zerotm);
|
||
|
break;
|
||
|
case 2: // except
|
||
|
ret = select(sn->fd + 1, 0, 0, &fdset, &zerotm);
|
||
|
break;
|
||
|
}
|
||
|
} while (ret == SOCKET_ERROR && WSAGetLastError() != WSAENOTSOCK);
|
||
|
|
||
|
if (ret == SOCKET_ERROR && WSAGetLastError() == WSAENOTSOCK)
|
||
|
{
|
||
|
// disable the invalid socket notifier
|
||
|
static const char *t[] = { "Read", "Write", "Exception" };
|
||
|
qWarning("QSocketNotifier: invalid socket %d and type '%s', disabling...",
|
||
|
sn->fd, t[type]);
|
||
|
sn->obj->setEnabled(FALSE);
|
||
|
}
|
||
|
|
||
|
sn = list->next();
|
||
|
}
|
||
|
}
|
||
|
LeaveCriticalSection(&d->m_csVec);
|
||
|
}
|
||
|
} else {
|
||
|
// EINVAL... shouldn't happen, so let's complain to stderr
|
||
|
// and hope someone sends us a bug report
|
||
|
DWORD dw = WSAGetLastError();
|
||
|
qWarning("QEventLoopEx: select failed with error %i\n",dw);
|
||
|
}
|
||
|
}
|
||
|
else
|
||
|
{
|
||
|
EnterCriticalSection(&d->m_csVec);
|
||
|
|
||
|
if(FD_ISSET( d->m_sockUpdate, &d->sn_vec[0].select_fds))
|
||
|
{
|
||
|
d->m_sockUpdate = socket(AF_INET,SOCK_DGRAM,0);
|
||
|
#ifdef _DEBUG_EVENTLOOPEX
|
||
|
qDebug("QEventLoopEx: update socket signaled -> recreate it %i",d->m_sockUpdate);
|
||
|
#endif
|
||
|
}
|
||
|
|
||
|
// if select says data is ready on any socket, then set the socket notifier
|
||
|
// to pending
|
||
|
int i;
|
||
|
for ( i=0; i<3; i++ )
|
||
|
{
|
||
|
if ( ! d->sn_vec[i].list )
|
||
|
continue;
|
||
|
|
||
|
QPtrList<QSockNotEx> *list = d->sn_vec[i].list;
|
||
|
QSockNotEx *sn = list->first();
|
||
|
while ( sn ) {
|
||
|
if ( FD_ISSET( sn->fd, &d->sn_vec[i].select_fds ) )
|
||
|
{
|
||
|
QEvent event( QEvent::SockAct );
|
||
|
setSocketNotifierPending( sn->obj );
|
||
|
}
|
||
|
sn = list->next();
|
||
|
}
|
||
|
}
|
||
|
LeaveCriticalSection(&d->m_csVec);
|
||
|
}
|
||
|
if(!d->sn_pending_list.isEmpty() )
|
||
|
{
|
||
|
QApplication::eventLoop()->wakeUp();
|
||
|
#ifdef _DEBUG_EVENTLOOPEX
|
||
|
qDebug("QEventLoopEx: wake up main event loop and wait for pending list empty");
|
||
|
#endif
|
||
|
WaitForSingleObject(d->m_evPendingListEmpty,INFINITE);
|
||
|
#ifdef _DEBUG_EVENTLOOPEX
|
||
|
qDebug("QEventLoopEx: pending list now empty again");
|
||
|
#endif
|
||
|
ResetEvent(d->m_evPendingListEmpty);
|
||
|
}
|
||
|
}
|
||
|
while(!d->m_bStopped);
|
||
|
}
|
||
|
|
||
|
#include "qeventloopex.moc"
|