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48 #include "qtlocalpeer.h"
49 #include <QtCore/QCoreApplication>
50 #include <QtCore/QTime>
53 #include <QtCore/QLibrary>
54 #include <QtCore/qt_windows.h>
55 typedef BOOL(WINAPI*PProcessIdToSessionId)(DWORD,DWORD*);
56 static PProcessIdToSessionId pProcessIdToSessionId = 0;
58 #if defined(Q_OS_UNIX)
62 namespace QtLP_Private {
63 #include "qtlockedfile.cpp"
65 #include "qtlockedfile_win.cpp"
67 #include "qtlockedfile_unix.cpp"
71 const char* QtLocalPeer::ack = "ack";
73 QtLocalPeer::QtLocalPeer(QObject* parent, const QString &appId)
74 : QObject(parent), id(appId)
78 id = QCoreApplication::applicationFilePath();
82 prefix = id.section(QLatin1Char('/'), -1);
84 prefix.remove(QRegExp("[^a-zA-Z]"));
87 QByteArray idc = id.toUtf8();
88 quint16 idNum = qChecksum(idc.constData(), idc.size());
89 socketName = QLatin1String("qtsingleapp-") + prefix
90 + QLatin1Char('-') + QString::number(idNum, 16);
93 if (!pProcessIdToSessionId) {
94 QLibrary lib("kernel32");
95 pProcessIdToSessionId = (PProcessIdToSessionId)lib.resolve("ProcessIdToSessionId");
97 if (pProcessIdToSessionId) {
99 pProcessIdToSessionId(GetCurrentProcessId(), &sessionId);
100 socketName += QLatin1Char('-') + QString::number(sessionId, 16);
103 socketName += QLatin1Char('-') + QString::number(::getuid(), 16);
106 server = new QLocalServer(this);
107 QString lockName = QDir(QDir::tempPath()).absolutePath()
108 + QLatin1Char('/') + socketName
109 + QLatin1String("-lockfile");
110 lockFile.setFileName(lockName);
111 lockFile.open(QIODevice::ReadWrite);
116 bool QtLocalPeer::isClient()
118 if (lockFile.isLocked())
121 if (!lockFile.lock(QtLP_Private::QtLockedFile::WriteLock, false))
124 bool res = server->listen(socketName);
125 #if defined(Q_OS_UNIX) && (QT_VERSION >= QT_VERSION_CHECK(4,5,0))
127 if (!res && server->serverError() == QAbstractSocket::AddressInUseError) {
128 QFile::remove(QDir::cleanPath(QDir::tempPath())+QLatin1Char('/')+socketName);
129 res = server->listen(socketName);
133 qWarning("QtSingleCoreApplication: listen on local socket failed, %s", qPrintable(server->errorString()));
134 QObject::connect(server, SIGNAL(newConnection()), SLOT(receiveConnection()));
139 bool QtLocalPeer::sendMessage(const QString &message, int timeout)
146 for(int i = 0; i < 2; i++) {
147 // Try twice, in case the other instance is just starting up
148 socket.connectToServer(socketName);
149 connOk = socket.waitForConnected(timeout/2);
153 #if defined(Q_OS_WIN)
156 struct timespec ts = { ms / 1000, (ms % 1000) * 1000 * 1000 };
157 nanosleep(&ts, NULL);
163 QByteArray uMsg(message.toUtf8());
164 QDataStream ds(&socket);
165 ds.writeBytes(uMsg.constData(), uMsg.size());
166 bool res = socket.waitForBytesWritten(timeout);
167 res &= socket.waitForReadyRead(timeout); // wait for ack
168 res &= (socket.read(qstrlen(ack)) == ack);
173 void QtLocalPeer::receiveConnection()
175 QLocalSocket* socket = server->nextPendingConnection();
179 while (socket->bytesAvailable() < (int)sizeof(quint32))
180 socket->waitForReadyRead();
181 QDataStream ds(socket);
185 uMsg.resize(remaining);
187 char* uMsgBuf = uMsg.data();
189 got = ds.readRawData(uMsgBuf, remaining);
192 } while (remaining && got >= 0 && socket->waitForReadyRead(2000));
194 qWarning() << "QtLocalPeer: Message reception failed" << socket->errorString();
198 QString message(QString::fromUtf8(uMsg));
199 socket->write(ack, qstrlen(ack));
200 socket->waitForBytesWritten(1000);
202 emit messageReceived(message); //### (might take a long time to return)