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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)
61 #include <sys/types.h>
65 namespace QtLP_Private {
66 #include "qtlockedfile.cpp"
68 #include "qtlockedfile_win.cpp"
70 #include "qtlockedfile_unix.cpp"
74 const char* QtLocalPeer::ack = "ack";
76 QtLocalPeer::QtLocalPeer(QObject* parent, const QString &appId)
77 : QObject(parent), id(appId)
81 id = QCoreApplication::applicationFilePath();
85 prefix = id.section(QLatin1Char('/'), -1);
87 prefix.remove(QRegExp(QLatin1String("[^a-zA-Z]")));
90 QByteArray idc = id.toUtf8();
91 quint16 idNum = qChecksum(idc.constData(), idc.size());
92 socketName = QLatin1String("qtsingleapp-") + prefix
93 + QLatin1Char('-') + QString::number(idNum, 16);
96 if (!pProcessIdToSessionId) {
97 QLibrary lib("kernel32");
98 pProcessIdToSessionId = (PProcessIdToSessionId)lib.resolve("ProcessIdToSessionId");
100 if (pProcessIdToSessionId) {
102 pProcessIdToSessionId(GetCurrentProcessId(), &sessionId);
103 socketName += QLatin1Char('-') + QString::number(sessionId, 16);
106 socketName += QLatin1Char('-') + QString::number(::getuid(), 16);
109 server = new QLocalServer(this);
110 QString lockName = QDir(QDir::tempPath()).absolutePath()
111 + QLatin1Char('/') + socketName
112 + QLatin1String("-lockfile");
113 lockFile.setFileName(lockName);
114 lockFile.open(QIODevice::ReadWrite);
119 bool QtLocalPeer::isClient()
121 if (lockFile.isLocked())
124 if (!lockFile.lock(QtLP_Private::QtLockedFile::WriteLock, false))
127 bool res = server->listen(socketName);
128 #if defined(Q_OS_UNIX) && (QT_VERSION >= QT_VERSION_CHECK(4,5,0))
130 if (!res && server->serverError() == QAbstractSocket::AddressInUseError) {
131 QFile::remove(QDir::cleanPath(QDir::tempPath())+QLatin1Char('/')+socketName);
132 res = server->listen(socketName);
136 qWarning("QtSingleCoreApplication: listen on local socket failed, %s", qPrintable(server->errorString()));
137 QObject::connect(server, SIGNAL(newConnection()), SLOT(receiveConnection()));
142 bool QtLocalPeer::sendMessage(const QString &message, int timeout)
149 for(int i = 0; i < 2; i++) {
150 // Try twice, in case the other instance is just starting up
151 socket.connectToServer(socketName);
152 connOk = socket.waitForConnected(timeout/2);
156 #if defined(Q_OS_WIN)
159 struct timespec ts = { ms / 1000, (ms % 1000) * 1000 * 1000 };
160 nanosleep(&ts, NULL);
166 QByteArray uMsg(message.toUtf8());
167 QDataStream ds(&socket);
168 ds.writeBytes(uMsg.constData(), uMsg.size());
169 bool res = socket.waitForBytesWritten(timeout);
170 res &= socket.waitForReadyRead(timeout); // wait for ack
171 res &= (socket.read(qstrlen(ack)) == ack);
176 void QtLocalPeer::receiveConnection()
178 QLocalSocket* socket = server->nextPendingConnection();
182 while (socket->bytesAvailable() < (int)sizeof(quint32))
183 socket->waitForReadyRead();
184 QDataStream ds(socket);
188 uMsg.resize(remaining);
190 char* uMsgBuf = uMsg.data();
192 got = ds.readRawData(uMsgBuf, remaining);
195 } while (remaining && got >= 0 && socket->waitForReadyRead(2000));
197 qWarning() << "QtLocalPeer: Message reception failed" << socket->errorString();
201 QString message(QString::fromUtf8(uMsg));
202 socket->write(ack, qstrlen(ack));
203 socket->waitForBytesWritten(1000);
205 emit messageReceived(message); //### (might take a long time to return)