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48 #include "qtlocalpeer.h"
49 #include <QtCore/QCoreApplication>
50 #include <QtCore/QTime>
51 #include <QDataStream>
55 #include <QtCore/QLibrary>
56 #include <QtCore/qt_windows.h>
57 typedef BOOL(WINAPI*PProcessIdToSessionId)(DWORD,DWORD*);
58 static PProcessIdToSessionId pProcessIdToSessionId = 0;
60 #if defined(Q_OS_UNIX)
62 #include <sys/types.h>
66 namespace QtLP_Private {
67 #include "qtlockedfile.cpp"
69 #include "qtlockedfile_win.cpp"
71 #include "qtlockedfile_unix.cpp"
75 const char* QtLocalPeer::ack = "ack";
77 QtLocalPeer::QtLocalPeer(QObject* parent, const QString &appId)
78 : QObject(parent), id(appId)
82 id = QCoreApplication::applicationFilePath();
86 prefix = id.section(QLatin1Char('/'), -1);
88 prefix.remove(QRegExp(QLatin1String("[^a-zA-Z]")));
91 QByteArray idc = id.toUtf8();
92 quint16 idNum = qChecksum(idc.constData(), idc.size());
93 socketName = QLatin1String("qtsingleapp-") + prefix
94 + QLatin1Char('-') + QString::number(idNum, 16);
97 if (!pProcessIdToSessionId) {
98 QLibrary lib("kernel32");
99 pProcessIdToSessionId = (PProcessIdToSessionId)lib.resolve("ProcessIdToSessionId");
101 if (pProcessIdToSessionId) {
103 pProcessIdToSessionId(GetCurrentProcessId(), &sessionId);
104 socketName += QLatin1Char('-') + QString::number(sessionId, 16);
107 socketName += QLatin1Char('-') + QString::number(::getuid(), 16);
110 server = new QLocalServer(this);
111 QString lockName = QDir(QDir::tempPath()).absolutePath()
112 + QLatin1Char('/') + socketName
113 + QLatin1String("-lockfile");
114 lockFile.setFileName(lockName);
115 lockFile.open(QIODevice::ReadWrite);
120 bool QtLocalPeer::isClient()
122 if (lockFile.isLocked())
125 if (!lockFile.lock(QtLP_Private::QtLockedFile::WriteLock, false))
128 bool res = server->listen(socketName);
129 #if defined(Q_OS_UNIX) && (QT_VERSION >= QT_VERSION_CHECK(4,5,0))
131 if (!res && server->serverError() == QAbstractSocket::AddressInUseError) {
132 QFile::remove(QDir::cleanPath(QDir::tempPath())+QLatin1Char('/')+socketName);
133 res = server->listen(socketName);
137 qWarning("QtSingleCoreApplication: listen on local socket failed, %s", qPrintable(server->errorString()));
138 QObject::connect(server, SIGNAL(newConnection()), SLOT(receiveConnection()));
143 bool QtLocalPeer::sendMessage(const QString &message, int timeout)
150 for(int i = 0; i < 2; i++) {
151 // Try twice, in case the other instance is just starting up
152 socket.connectToServer(socketName);
153 connOk = socket.waitForConnected(timeout/2);
157 #if defined(Q_OS_WIN)
160 struct timespec ts = { ms / 1000, (ms % 1000) * 1000 * 1000 };
161 nanosleep(&ts, NULL);
167 QByteArray uMsg(message.toUtf8());
168 QDataStream ds(&socket);
169 ds.writeBytes(uMsg.constData(), uMsg.size());
170 bool res = socket.waitForBytesWritten(timeout);
171 res &= socket.waitForReadyRead(timeout); // wait for ack
172 res &= (socket.read(qstrlen(ack)) == ack);
177 void QtLocalPeer::receiveConnection()
179 QLocalSocket* socket = server->nextPendingConnection();
183 while (socket->bytesAvailable() < (int)sizeof(quint32))
184 socket->waitForReadyRead();
185 QDataStream ds(socket);
189 uMsg.resize(remaining);
191 char* uMsgBuf = uMsg.data();
193 got = ds.readRawData(uMsgBuf, remaining);
196 } while (remaining && got >= 0 && socket->waitForReadyRead(2000));
198 qWarning() << "QtLocalPeer: Message reception failed" << socket->errorString();
202 QString message(QString::fromUtf8(uMsg));
203 socket->write(ack, qstrlen(ack));
204 socket->waitForBytesWritten(1000);
206 emit messageReceived(message); //### (might take a long time to return)