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48 #include "qtlocalpeer.h"
49 #include <QtCore/QCoreApplication>
50 #include <QtCore/QTime>
54 #include <QtCore/QLibrary>
55 #include <QtCore/qt_windows.h>
56 typedef BOOL(WINAPI*PProcessIdToSessionId)(DWORD,DWORD*);
57 static PProcessIdToSessionId pProcessIdToSessionId = 0;
59 #if defined(Q_OS_UNIX)
63 namespace QtLP_Private {
64 #include "qtlockedfile.cpp"
66 #include "qtlockedfile_win.cpp"
68 #include "qtlockedfile_unix.cpp"
72 const char* QtLocalPeer::ack = "ack";
74 QtLocalPeer::QtLocalPeer(QObject* parent, const QString &appId)
75 : QObject(parent), id(appId)
79 id = QCoreApplication::applicationFilePath();
83 prefix = id.section(QLatin1Char('/'), -1);
85 prefix.remove(QRegExp("[^a-zA-Z]"));
88 QByteArray idc = id.toUtf8();
89 quint16 idNum = qChecksum(idc.constData(), idc.size());
90 socketName = QLatin1String("qtsingleapp-") + prefix
91 + QLatin1Char('-') + QString::number(idNum, 16);
94 if (!pProcessIdToSessionId) {
95 QLibrary lib("kernel32");
96 pProcessIdToSessionId = (PProcessIdToSessionId)lib.resolve("ProcessIdToSessionId");
98 if (pProcessIdToSessionId) {
100 pProcessIdToSessionId(GetCurrentProcessId(), &sessionId);
101 socketName += QLatin1Char('-') + QString::number(sessionId, 16);
104 socketName += QLatin1Char('-') + QString::number(::getuid(), 16);
107 server = new QLocalServer(this);
108 QString lockName = QDir(QDir::tempPath()).absolutePath()
109 + QLatin1Char('/') + socketName
110 + QLatin1String("-lockfile");
111 lockFile.setFileName(lockName);
112 lockFile.open(QIODevice::ReadWrite);
117 bool QtLocalPeer::isClient()
119 if (lockFile.isLocked())
122 if (!lockFile.lock(QtLP_Private::QtLockedFile::WriteLock, false))
125 bool res = server->listen(socketName);
126 #if defined(Q_OS_UNIX) && (QT_VERSION >= QT_VERSION_CHECK(4,5,0))
128 if (!res && server->serverError() == QAbstractSocket::AddressInUseError) {
129 QFile::remove(QDir::cleanPath(QDir::tempPath())+QLatin1Char('/')+socketName);
130 res = server->listen(socketName);
134 qWarning("QtSingleCoreApplication: listen on local socket failed, %s", qPrintable(server->errorString()));
135 QObject::connect(server, SIGNAL(newConnection()), SLOT(receiveConnection()));
140 bool QtLocalPeer::sendMessage(const QString &message, int timeout)
147 for(int i = 0; i < 2; i++) {
148 // Try twice, in case the other instance is just starting up
149 socket.connectToServer(socketName);
150 connOk = socket.waitForConnected(timeout/2);
154 #if defined(Q_OS_WIN)
157 struct timespec ts = { ms / 1000, (ms % 1000) * 1000 * 1000 };
158 nanosleep(&ts, NULL);
164 QByteArray uMsg(message.toUtf8());
165 QDataStream ds(&socket);
166 ds.writeBytes(uMsg.constData(), uMsg.size());
167 bool res = socket.waitForBytesWritten(timeout);
168 res &= socket.waitForReadyRead(timeout); // wait for ack
169 res &= (socket.read(qstrlen(ack)) == ack);
174 void QtLocalPeer::receiveConnection()
176 QLocalSocket* socket = server->nextPendingConnection();
180 while (socket->bytesAvailable() < (int)sizeof(quint32))
181 socket->waitForReadyRead();
182 QDataStream ds(socket);
186 uMsg.resize(remaining);
188 char* uMsgBuf = uMsg.data();
190 got = ds.readRawData(uMsgBuf, remaining);
193 } while (remaining && got >= 0 && socket->waitForReadyRead(2000));
195 qWarning() << "QtLocalPeer: Message reception failed" << socket->errorString();
199 QString message(QString::fromUtf8(uMsg));
200 socket->write(ack, qstrlen(ack));
201 socket->waitForBytesWritten(1000);
203 emit messageReceived(message); //### (might take a long time to return)