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Revision60fe0c2787df0450c763f9c3158885e0baceaab5 (tree)
Time2020-07-04 19:14:08
Authorsimphone
Commitersimphone

Log Message

qtsingleapplication 2.6

Change Summary

Incremental Difference

diff -r d88d6eb1f9fe -r 60fe0c2787df qtsingleapplication/QtLockedFile
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/qtsingleapplication/QtLockedFile Sat Jul 04 06:14:08 2020 -0400
@@ -0,0 +1,1 @@
1+#include "qtlockedfile.h"
diff -r d88d6eb1f9fe -r 60fe0c2787df qtsingleapplication/QtSingleApplication
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/qtsingleapplication/QtSingleApplication Sat Jul 04 06:14:08 2020 -0400
@@ -0,0 +1,1 @@
1+#include "qtsingleapplication.h"
diff -r d88d6eb1f9fe -r 60fe0c2787df qtsingleapplication/README.TXT
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/qtsingleapplication/README.TXT Sat Jul 04 06:14:08 2020 -0400
@@ -0,0 +1,33 @@
1+Qt Solutions Component: Single Application
2+
3+The QtSingleApplication component provides support for
4+applications that can be only started once per user.
5+
6+
7+
8+Version history:
9+
10+2.0: - Version 1.3 ported to Qt 4.
11+
12+2.1: - Fix compilation problem on Mac.
13+
14+2.2: - Really fix the Mac compilation problem.
15+ - Mac: fix crash due to wrong object releasing.
16+ - Mac: Fix memory leak.
17+
18+2.3: - Windows: Force creation of internal widget to make it work
19+ with Qt 4.2.
20+
21+2.4: - Fix the system for automatic window raising on message
22+ reception. NOTE: minor API change.
23+
24+2.5: - Mac: Fix isRunning() to work and report correctly.
25+
26+2.6: - - initialize() is now obsolete, no longer necessary to call
27+ it
28+ - - Fixed race condition where multiple instances migth be started
29+ - - QtSingleCoreApplication variant provided for non-GUI (console)
30+ usage
31+ - Complete reimplementation. Visible changes:
32+ - LGPL release.
33+
diff -r d88d6eb1f9fe -r 60fe0c2787df qtsingleapplication/qtlocalpeer.cpp
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/qtsingleapplication/qtlocalpeer.cpp Sat Jul 04 06:14:08 2020 -0400
@@ -0,0 +1,213 @@
1+/****************************************************************************
2+**
3+** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
4+** Contact: http://www.qt-project.org/legal
5+**
6+** This file is part of the Qt Solutions component.
7+**
8+** $QT_BEGIN_LICENSE:BSD$
9+** You may use this file under the terms of the BSD license as follows:
10+**
11+** "Redistribution and use in source and binary forms, with or without
12+** modification, are permitted provided that the following conditions are
13+** met:
14+** * Redistributions of source code must retain the above copyright
15+** notice, this list of conditions and the following disclaimer.
16+** * Redistributions in binary form must reproduce the above copyright
17+** notice, this list of conditions and the following disclaimer in
18+** the documentation and/or other materials provided with the
19+** distribution.
20+** * Neither the name of Digia Plc and its Subsidiary(-ies) nor the names
21+** of its contributors may be used to endorse or promote products derived
22+** from this software without specific prior written permission.
23+**
24+**
25+** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
26+** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
27+** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
28+** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
29+** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
30+** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
31+** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
32+** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
33+** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
34+** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
35+** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
36+**
37+** $QT_END_LICENSE$
38+**
39+****************************************************************************/
40+
41+
42+#include "qtlocalpeer.h"
43+#include <QCoreApplication>
44+#include <QDataStream>
45+#include <QTime>
46+
47+#if defined(Q_OS_WIN)
48+#include <QLibrary>
49+#include <qt_windows.h>
50+typedef BOOL(WINAPI*PProcessIdToSessionId)(DWORD,DWORD*);
51+static PProcessIdToSessionId pProcessIdToSessionId = 0;
52+#endif
53+#if defined(Q_OS_UNIX)
54+#include <sys/types.h>
55+#include <time.h>
56+#include <unistd.h>
57+#endif
58+
59+namespace QtLP_Private {
60+#include "qtlockedfile.cpp"
61+#if defined(Q_OS_WIN)
62+#include "qtlockedfile_win.cpp"
63+#else
64+#include "qtlockedfile_unix.cpp"
65+#endif
66+}
67+
68+const char* QtLocalPeer::ack = "ack";
69+
70+QtLocalPeer::QtLocalPeer(QObject* parent, const QString &appId)
71+ : QObject(parent), id(appId)
72+{
73+ QString prefix = id;
74+ if (id.isEmpty()) {
75+ id = QCoreApplication::applicationFilePath();
76+#if defined(Q_OS_WIN)
77+ id = id.toLower();
78+#endif
79+ prefix = id.section(QLatin1Char('/'), -1);
80+ }
81+ prefix.remove(QRegExp("[^a-zA-Z]"));
82+ prefix.truncate(6);
83+
84+ QByteArray idc = id.toUtf8();
85+ quint16 idNum = qChecksum(idc.constData(), idc.size());
86+ socketName = QLatin1String("qtsingleapp-") + prefix
87+ + QLatin1Char('-') + QString::number(idNum, 16);
88+
89+#if defined(Q_OS_WIN)
90+ if (!pProcessIdToSessionId) {
91+ QLibrary lib("kernel32");
92+ pProcessIdToSessionId = (PProcessIdToSessionId)lib.resolve("ProcessIdToSessionId");
93+ }
94+ if (pProcessIdToSessionId) {
95+ DWORD sessionId = 0;
96+ pProcessIdToSessionId(GetCurrentProcessId(), &sessionId);
97+ socketName += QLatin1Char('-') + QString::number(sessionId, 16);
98+ }
99+#else
100+ socketName += QLatin1Char('-') + QString::number(::getuid(), 16);
101+#endif
102+
103+ server = new QLocalServer(this);
104+ QString lockName = QDir(QDir::tempPath()).absolutePath()
105+ + QLatin1Char('/') + socketName
106+ + QLatin1String("-lockfile");
107+ lockFile.setFileName(lockName);
108+ lockFile.open(QIODevice::ReadWrite);
109+}
110+
111+
112+
113+bool QtLocalPeer::isClient()
114+{
115+ if (lockFile.isLocked())
116+ return false;
117+
118+ if (!lockFile.lock(QtLP_Private::QtLockedFile::WriteLock, false))
119+ return true;
120+
121+ bool res = server->listen(socketName);
122+#if defined(Q_OS_UNIX) && (QT_VERSION >= QT_VERSION_CHECK(4,5,0))
123+ // ### Workaround
124+ if (!res && server->serverError() == QAbstractSocket::AddressInUseError) {
125+ QFile::remove(QDir::cleanPath(QDir::tempPath())+QLatin1Char('/')+socketName);
126+ res = server->listen(socketName);
127+ }
128+#endif
129+ if (!res)
130+ qWarning("QtSingleCoreApplication: listen on local socket failed, %s", qPrintable(server->errorString()));
131+ QObject::connect(server, SIGNAL(newConnection()), SLOT(receiveConnection()));
132+ return false;
133+}
134+
135+
136+bool QtLocalPeer::sendMessage(const QString &message, int timeout)
137+{
138+ if (!isClient())
139+ return false;
140+
141+ QLocalSocket socket;
142+ bool connOk = false;
143+ for(int i = 0; i < 2; i++) {
144+ // Try twice, in case the other instance is just starting up
145+ socket.connectToServer(socketName);
146+ connOk = socket.waitForConnected(timeout/2);
147+ if (connOk || i)
148+ break;
149+ int ms = 250;
150+#if defined(Q_OS_WIN)
151+ Sleep(DWORD(ms));
152+#else
153+ struct timespec ts = { ms / 1000, (ms % 1000) * 1000 * 1000 };
154+ nanosleep(&ts, NULL);
155+#endif
156+ }
157+ if (!connOk)
158+ return false;
159+
160+ QByteArray uMsg(message.toUtf8());
161+ QDataStream ds(&socket);
162+ ds.writeBytes(uMsg.constData(), uMsg.size());
163+ bool res = socket.waitForBytesWritten(timeout);
164+ if (res) {
165+ res &= socket.waitForReadyRead(timeout); // wait for ack
166+ if (res)
167+ res &= (socket.read(qstrlen(ack)) == ack);
168+ }
169+ return res;
170+}
171+
172+
173+void QtLocalPeer::receiveConnection()
174+{
175+ QLocalSocket* socket = server->nextPendingConnection();
176+ if (!socket)
177+ return;
178+
179+ while (true) {
180+ if (socket->state() == QLocalSocket::UnconnectedState) {
181+ qWarning("QtLocalPeer: Peer disconnected");
182+ delete socket;
183+ return;
184+ }
185+ if (socket->bytesAvailable() >= qint64(sizeof(quint32)))
186+ break;
187+ socket->waitForReadyRead();
188+ }
189+
190+ QDataStream ds(socket);
191+ QByteArray uMsg;
192+ quint32 remaining;
193+ ds >> remaining;
194+ uMsg.resize(remaining);
195+ int got = 0;
196+ char* uMsgBuf = uMsg.data();
197+ do {
198+ got = ds.readRawData(uMsgBuf, remaining);
199+ remaining -= got;
200+ uMsgBuf += got;
201+ } while (remaining && got >= 0 && socket->waitForReadyRead(2000));
202+ if (got < 0) {
203+ qWarning("QtLocalPeer: Message reception failed %s", socket->errorString().toLatin1().constData());
204+ delete socket;
205+ return;
206+ }
207+ QString message(QString::fromUtf8(uMsg));
208+ socket->write(ack, qstrlen(ack));
209+ socket->waitForBytesWritten(1000);
210+ socket->waitForDisconnected(1000); // make sure client reads ack
211+ delete socket;
212+ emit messageReceived(message); //### (might take a long time to return)
213+}
diff -r d88d6eb1f9fe -r 60fe0c2787df qtsingleapplication/qtlocalpeer.h
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/qtsingleapplication/qtlocalpeer.h Sat Jul 04 06:14:08 2020 -0400
@@ -0,0 +1,77 @@
1+/****************************************************************************
2+**
3+** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
4+** Contact: http://www.qt-project.org/legal
5+**
6+** This file is part of the Qt Solutions component.
7+**
8+** $QT_BEGIN_LICENSE:BSD$
9+** You may use this file under the terms of the BSD license as follows:
10+**
11+** "Redistribution and use in source and binary forms, with or without
12+** modification, are permitted provided that the following conditions are
13+** met:
14+** * Redistributions of source code must retain the above copyright
15+** notice, this list of conditions and the following disclaimer.
16+** * Redistributions in binary form must reproduce the above copyright
17+** notice, this list of conditions and the following disclaimer in
18+** the documentation and/or other materials provided with the
19+** distribution.
20+** * Neither the name of Digia Plc and its Subsidiary(-ies) nor the names
21+** of its contributors may be used to endorse or promote products derived
22+** from this software without specific prior written permission.
23+**
24+**
25+** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
26+** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
27+** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
28+** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
29+** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
30+** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
31+** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
32+** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
33+** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
34+** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
35+** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
36+**
37+** $QT_END_LICENSE$
38+**
39+****************************************************************************/
40+
41+#ifndef QTLOCALPEER_H
42+#define QTLOCALPEER_H
43+
44+#include <QLocalServer>
45+#include <QLocalSocket>
46+#include <QDir>
47+
48+#include "qtlockedfile.h"
49+
50+class QtLocalPeer : public QObject
51+{
52+ Q_OBJECT
53+
54+public:
55+ QtLocalPeer(QObject *parent = 0, const QString &appId = QString());
56+ bool isClient();
57+ bool sendMessage(const QString &message, int timeout);
58+ QString applicationId() const
59+ { return id; }
60+
61+Q_SIGNALS:
62+ void messageReceived(const QString &message);
63+
64+protected Q_SLOTS:
65+ void receiveConnection();
66+
67+protected:
68+ QString id;
69+ QString socketName;
70+ QLocalServer* server;
71+ QtLP_Private::QtLockedFile lockFile;
72+
73+private:
74+ static const char* ack;
75+};
76+
77+#endif // QTLOCALPEER_H
diff -r d88d6eb1f9fe -r 60fe0c2787df qtsingleapplication/qtlockedfile.cpp
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/qtsingleapplication/qtlockedfile.cpp Sat Jul 04 06:14:08 2020 -0400
@@ -0,0 +1,193 @@
1+/****************************************************************************
2+**
3+** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
4+** Contact: http://www.qt-project.org/legal
5+**
6+** This file is part of the Qt Solutions component.
7+**
8+** $QT_BEGIN_LICENSE:BSD$
9+** You may use this file under the terms of the BSD license as follows:
10+**
11+** "Redistribution and use in source and binary forms, with or without
12+** modification, are permitted provided that the following conditions are
13+** met:
14+** * Redistributions of source code must retain the above copyright
15+** notice, this list of conditions and the following disclaimer.
16+** * Redistributions in binary form must reproduce the above copyright
17+** notice, this list of conditions and the following disclaimer in
18+** the documentation and/or other materials provided with the
19+** distribution.
20+** * Neither the name of Digia Plc and its Subsidiary(-ies) nor the names
21+** of its contributors may be used to endorse or promote products derived
22+** from this software without specific prior written permission.
23+**
24+**
25+** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
26+** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
27+** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
28+** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
29+** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
30+** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
31+** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
32+** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
33+** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
34+** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
35+** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
36+**
37+** $QT_END_LICENSE$
38+**
39+****************************************************************************/
40+
41+#include "qtlockedfile.h"
42+
43+/*!
44+ \class QtLockedFile
45+
46+ \brief The QtLockedFile class extends QFile with advisory locking
47+ functions.
48+
49+ A file may be locked in read or write mode. Multiple instances of
50+ \e QtLockedFile, created in multiple processes running on the same
51+ machine, may have a file locked in read mode. Exactly one instance
52+ may have it locked in write mode. A read and a write lock cannot
53+ exist simultaneously on the same file.
54+
55+ The file locks are advisory. This means that nothing prevents
56+ another process from manipulating a locked file using QFile or
57+ file system functions offered by the OS. Serialization is only
58+ guaranteed if all processes that access the file use
59+ QLockedFile. Also, while holding a lock on a file, a process
60+ must not open the same file again (through any API), or locks
61+ can be unexpectedly lost.
62+
63+ The lock provided by an instance of \e QtLockedFile is released
64+ whenever the program terminates. This is true even when the
65+ program crashes and no destructors are called.
66+*/
67+
68+/*! \enum QtLockedFile::LockMode
69+
70+ This enum describes the available lock modes.
71+
72+ \value ReadLock A read lock.
73+ \value WriteLock A write lock.
74+ \value NoLock Neither a read lock nor a write lock.
75+*/
76+
77+/*!
78+ Constructs an unlocked \e QtLockedFile object. This constructor
79+ behaves in the same way as \e QFile::QFile().
80+
81+ \sa QFile::QFile()
82+*/
83+QtLockedFile::QtLockedFile()
84+ : QFile()
85+{
86+#ifdef Q_OS_WIN
87+ wmutex = 0;
88+ rmutex = 0;
89+#endif
90+ m_lock_mode = NoLock;
91+}
92+
93+/*!
94+ Constructs an unlocked QtLockedFile object with file \a name. This
95+ constructor behaves in the same way as \e QFile::QFile(const
96+ QString&).
97+
98+ \sa QFile::QFile()
99+*/
100+QtLockedFile::QtLockedFile(const QString &name)
101+ : QFile(name)
102+{
103+#ifdef Q_OS_WIN
104+ wmutex = 0;
105+ rmutex = 0;
106+#endif
107+ m_lock_mode = NoLock;
108+}
109+
110+/*!
111+ Opens the file in OpenMode \a mode.
112+
113+ This is identical to QFile::open(), with the one exception that the
114+ Truncate mode flag is disallowed. Truncation would conflict with the
115+ advisory file locking, since the file would be modified before the
116+ write lock is obtained. If truncation is required, use resize(0)
117+ after obtaining the write lock.
118+
119+ Returns true if successful; otherwise false.
120+
121+ \sa QFile::open(), QFile::resize()
122+*/
123+bool QtLockedFile::open(OpenMode mode)
124+{
125+ if (mode & QIODevice::Truncate) {
126+ qWarning("QtLockedFile::open(): Truncate mode not allowed.");
127+ return false;
128+ }
129+ return QFile::open(mode);
130+}
131+
132+/*!
133+ Returns \e true if this object has a in read or write lock;
134+ otherwise returns \e false.
135+
136+ \sa lockMode()
137+*/
138+bool QtLockedFile::isLocked() const
139+{
140+ return m_lock_mode != NoLock;
141+}
142+
143+/*!
144+ Returns the type of lock currently held by this object, or \e
145+ QtLockedFile::NoLock.
146+
147+ \sa isLocked()
148+*/
149+QtLockedFile::LockMode QtLockedFile::lockMode() const
150+{
151+ return m_lock_mode;
152+}
153+
154+/*!
155+ \fn bool QtLockedFile::lock(LockMode mode, bool block = true)
156+
157+ Obtains a lock of type \a mode. The file must be opened before it
158+ can be locked.
159+
160+ If \a block is true, this function will block until the lock is
161+ aquired. If \a block is false, this function returns \e false
162+ immediately if the lock cannot be aquired.
163+
164+ If this object already has a lock of type \a mode, this function
165+ returns \e true immediately. If this object has a lock of a
166+ different type than \a mode, the lock is first released and then a
167+ new lock is obtained.
168+
169+ This function returns \e true if, after it executes, the file is
170+ locked by this object, and \e false otherwise.
171+
172+ \sa unlock(), isLocked(), lockMode()
173+*/
174+
175+/*!
176+ \fn bool QtLockedFile::unlock()
177+
178+ Releases a lock.
179+
180+ If the object has no lock, this function returns immediately.
181+
182+ This function returns \e true if, after it executes, the file is
183+ not locked by this object, and \e false otherwise.
184+
185+ \sa lock(), isLocked(), lockMode()
186+*/
187+
188+/*!
189+ \fn QtLockedFile::~QtLockedFile()
190+
191+ Destroys the \e QtLockedFile object. If any locks were held, they
192+ are released.
193+*/
diff -r d88d6eb1f9fe -r 60fe0c2787df qtsingleapplication/qtlockedfile.h
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/qtsingleapplication/qtlockedfile.h Sat Jul 04 06:14:08 2020 -0400
@@ -0,0 +1,97 @@
1+/****************************************************************************
2+**
3+** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
4+** Contact: http://www.qt-project.org/legal
5+**
6+** This file is part of the Qt Solutions component.
7+**
8+** $QT_BEGIN_LICENSE:BSD$
9+** You may use this file under the terms of the BSD license as follows:
10+**
11+** "Redistribution and use in source and binary forms, with or without
12+** modification, are permitted provided that the following conditions are
13+** met:
14+** * Redistributions of source code must retain the above copyright
15+** notice, this list of conditions and the following disclaimer.
16+** * Redistributions in binary form must reproduce the above copyright
17+** notice, this list of conditions and the following disclaimer in
18+** the documentation and/or other materials provided with the
19+** distribution.
20+** * Neither the name of Digia Plc and its Subsidiary(-ies) nor the names
21+** of its contributors may be used to endorse or promote products derived
22+** from this software without specific prior written permission.
23+**
24+**
25+** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
26+** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
27+** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
28+** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
29+** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
30+** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
31+** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
32+** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
33+** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
34+** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
35+** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
36+**
37+** $QT_END_LICENSE$
38+**
39+****************************************************************************/
40+
41+#ifndef QTLOCKEDFILE_H
42+#define QTLOCKEDFILE_H
43+
44+#include <QFile>
45+#ifdef Q_OS_WIN
46+#include <QVector>
47+#endif
48+
49+#if defined(Q_OS_WIN)
50+# if !defined(QT_QTLOCKEDFILE_EXPORT) && !defined(QT_QTLOCKEDFILE_IMPORT)
51+# define QT_QTLOCKEDFILE_EXPORT
52+# elif defined(QT_QTLOCKEDFILE_IMPORT)
53+# if defined(QT_QTLOCKEDFILE_EXPORT)
54+# undef QT_QTLOCKEDFILE_EXPORT
55+# endif
56+# define QT_QTLOCKEDFILE_EXPORT __declspec(dllimport)
57+# elif defined(QT_QTLOCKEDFILE_EXPORT)
58+# undef QT_QTLOCKEDFILE_EXPORT
59+# define QT_QTLOCKEDFILE_EXPORT __declspec(dllexport)
60+# endif
61+#else
62+# define QT_QTLOCKEDFILE_EXPORT
63+#endif
64+
65+namespace QtLP_Private {
66+
67+class QT_QTLOCKEDFILE_EXPORT QtLockedFile : public QFile
68+{
69+public:
70+ enum LockMode { NoLock = 0, ReadLock, WriteLock };
71+
72+ QtLockedFile();
73+ QtLockedFile(const QString &name);
74+ ~QtLockedFile();
75+
76+ bool open(OpenMode mode);
77+
78+ bool lock(LockMode mode, bool block = true);
79+ bool unlock();
80+ bool isLocked() const;
81+ LockMode lockMode() const;
82+
83+private:
84+#ifdef Q_OS_WIN
85+ Qt::HANDLE wmutex;
86+ Qt::HANDLE rmutex;
87+ QVector<Qt::HANDLE> rmutexes;
88+ QString mutexname;
89+
90+ Qt::HANDLE getMutexHandle(int idx, bool doCreate);
91+ bool waitMutex(Qt::HANDLE mutex, bool doBlock);
92+
93+#endif
94+ LockMode m_lock_mode;
95+};
96+}
97+#endif
diff -r d88d6eb1f9fe -r 60fe0c2787df qtsingleapplication/qtlockedfile_unix.cpp
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/qtsingleapplication/qtlockedfile_unix.cpp Sat Jul 04 06:14:08 2020 -0400
@@ -0,0 +1,115 @@
1+/****************************************************************************
2+**
3+** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
4+** Contact: http://www.qt-project.org/legal
5+**
6+** This file is part of the Qt Solutions component.
7+**
8+** $QT_BEGIN_LICENSE:BSD$
9+** You may use this file under the terms of the BSD license as follows:
10+**
11+** "Redistribution and use in source and binary forms, with or without
12+** modification, are permitted provided that the following conditions are
13+** met:
14+** * Redistributions of source code must retain the above copyright
15+** notice, this list of conditions and the following disclaimer.
16+** * Redistributions in binary form must reproduce the above copyright
17+** notice, this list of conditions and the following disclaimer in
18+** the documentation and/or other materials provided with the
19+** distribution.
20+** * Neither the name of Digia Plc and its Subsidiary(-ies) nor the names
21+** of its contributors may be used to endorse or promote products derived
22+** from this software without specific prior written permission.
23+**
24+**
25+** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
26+** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
27+** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
28+** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
29+** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
30+** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
31+** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
32+** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
33+** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
34+** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
35+** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
36+**
37+** $QT_END_LICENSE$
38+**
39+****************************************************************************/
40+
41+#include <string.h>
42+#include <errno.h>
43+#include <unistd.h>
44+#include <fcntl.h>
45+
46+#include "qtlockedfile.h"
47+
48+bool QtLockedFile::lock(LockMode mode, bool block)
49+{
50+ if (!isOpen()) {
51+ qWarning("QtLockedFile::lock(): file is not opened");
52+ return false;
53+ }
54+
55+ if (mode == NoLock)
56+ return unlock();
57+
58+ if (mode == m_lock_mode)
59+ return true;
60+
61+ if (m_lock_mode != NoLock)
62+ unlock();
63+
64+ struct flock fl;
65+ fl.l_whence = SEEK_SET;
66+ fl.l_start = 0;
67+ fl.l_len = 0;
68+ fl.l_type = (mode == ReadLock) ? F_RDLCK : F_WRLCK;
69+ int cmd = block ? F_SETLKW : F_SETLK;
70+ int ret = fcntl(handle(), cmd, &fl);
71+
72+ if (ret == -1) {
73+ if (errno != EINTR && errno != EAGAIN)
74+ qWarning("QtLockedFile::lock(): fcntl: %s", strerror(errno));
75+ return false;
76+ }
77+
78+
79+ m_lock_mode = mode;
80+ return true;
81+}
82+
83+
84+bool QtLockedFile::unlock()
85+{
86+ if (!isOpen()) {
87+ qWarning("QtLockedFile::unlock(): file is not opened");
88+ return false;
89+ }
90+
91+ if (!isLocked())
92+ return true;
93+
94+ struct flock fl;
95+ fl.l_whence = SEEK_SET;
96+ fl.l_start = 0;
97+ fl.l_len = 0;
98+ fl.l_type = F_UNLCK;
99+ int ret = fcntl(handle(), F_SETLKW, &fl);
100+
101+ if (ret == -1) {
102+ qWarning("QtLockedFile::lock(): fcntl: %s", strerror(errno));
103+ return false;
104+ }
105+
106+ m_lock_mode = NoLock;
107+ return true;
108+}
109+
110+QtLockedFile::~QtLockedFile()
111+{
112+ if (isOpen())
113+ unlock();
114+}
115+
diff -r d88d6eb1f9fe -r 60fe0c2787df qtsingleapplication/qtlockedfile_win.cpp
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/qtsingleapplication/qtlockedfile_win.cpp Sat Jul 04 06:14:08 2020 -0400
@@ -0,0 +1,211 @@
1+/****************************************************************************
2+**
3+** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
4+** Contact: http://www.qt-project.org/legal
5+**
6+** This file is part of the Qt Solutions component.
7+**
8+** $QT_BEGIN_LICENSE:BSD$
9+** You may use this file under the terms of the BSD license as follows:
10+**
11+** "Redistribution and use in source and binary forms, with or without
12+** modification, are permitted provided that the following conditions are
13+** met:
14+** * Redistributions of source code must retain the above copyright
15+** notice, this list of conditions and the following disclaimer.
16+** * Redistributions in binary form must reproduce the above copyright
17+** notice, this list of conditions and the following disclaimer in
18+** the documentation and/or other materials provided with the
19+** distribution.
20+** * Neither the name of Digia Plc and its Subsidiary(-ies) nor the names
21+** of its contributors may be used to endorse or promote products derived
22+** from this software without specific prior written permission.
23+**
24+**
25+** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
26+** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
27+** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
28+** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
29+** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
30+** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
31+** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
32+** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
33+** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
34+** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
35+** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
36+**
37+** $QT_END_LICENSE$
38+**
39+****************************************************************************/
40+
41+#include "qtlockedfile.h"
42+#include <qt_windows.h>
43+#include <QFileInfo>
44+
45+#define MUTEX_PREFIX "QtLockedFile mutex "
46+// Maximum number of concurrent read locks. Must not be greater than MAXIMUM_WAIT_OBJECTS
47+#define MAX_READERS MAXIMUM_WAIT_OBJECTS
48+
49+#if QT_VERSION >= 0x050000
50+#define QT_WA(unicode, ansi) unicode
51+#endif
52+
53+Qt::HANDLE QtLockedFile::getMutexHandle(int idx, bool doCreate)
54+{
55+ if (mutexname.isEmpty()) {
56+ QFileInfo fi(*this);
57+ mutexname = QString::fromLatin1(MUTEX_PREFIX)
58+ + fi.absoluteFilePath().toLower();
59+ }
60+ QString mname(mutexname);
61+ if (idx >= 0)
62+ mname += QString::number(idx);
63+
64+ Qt::HANDLE mutex;
65+ if (doCreate) {
66+ QT_WA( { mutex = CreateMutexW(NULL, FALSE, (TCHAR*)mname.utf16()); },
67+ { mutex = CreateMutexA(NULL, FALSE, mname.toLocal8Bit().constData()); } );
68+ if (!mutex) {
69+ qErrnoWarning("QtLockedFile::lock(): CreateMutex failed");
70+ return 0;
71+ }
72+ }
73+ else {
74+ QT_WA( { mutex = OpenMutexW(SYNCHRONIZE | MUTEX_MODIFY_STATE, FALSE, (TCHAR*)mname.utf16()); },
75+ { mutex = OpenMutexA(SYNCHRONIZE | MUTEX_MODIFY_STATE, FALSE, mname.toLocal8Bit().constData()); } );
76+ if (!mutex) {
77+ if (GetLastError() != ERROR_FILE_NOT_FOUND)
78+ qErrnoWarning("QtLockedFile::lock(): OpenMutex failed");
79+ return 0;
80+ }
81+ }
82+ return mutex;
83+}
84+
85+bool QtLockedFile::waitMutex(Qt::HANDLE mutex, bool doBlock)
86+{
87+ Q_ASSERT(mutex);
88+ DWORD res = WaitForSingleObject(mutex, doBlock ? INFINITE : 0);
89+ switch (res) {
90+ case WAIT_OBJECT_0:
91+ case WAIT_ABANDONED:
92+ return true;
93+ break;
94+ case WAIT_TIMEOUT:
95+ break;
96+ default:
97+ qErrnoWarning("QtLockedFile::lock(): WaitForSingleObject failed");
98+ }
99+ return false;
100+}
101+
102+
103+
104+bool QtLockedFile::lock(LockMode mode, bool block)
105+{
106+ if (!isOpen()) {
107+ qWarning("QtLockedFile::lock(): file is not opened");
108+ return false;
109+ }
110+
111+ if (mode == NoLock)
112+ return unlock();
113+
114+ if (mode == m_lock_mode)
115+ return true;
116+
117+ if (m_lock_mode != NoLock)
118+ unlock();
119+
120+ if (!wmutex && !(wmutex = getMutexHandle(-1, true)))
121+ return false;
122+
123+ if (!waitMutex(wmutex, block))
124+ return false;
125+
126+ if (mode == ReadLock) {
127+ int idx = 0;
128+ for (; idx < MAX_READERS; idx++) {
129+ rmutex = getMutexHandle(idx, false);
130+ if (!rmutex || waitMutex(rmutex, false))
131+ break;
132+ CloseHandle(rmutex);
133+ }
134+ bool ok = true;
135+ if (idx >= MAX_READERS) {
136+ qWarning("QtLockedFile::lock(): too many readers");
137+ rmutex = 0;
138+ ok = false;
139+ }
140+ else if (!rmutex) {
141+ rmutex = getMutexHandle(idx, true);
142+ if (!rmutex || !waitMutex(rmutex, false))
143+ ok = false;
144+ }
145+ if (!ok && rmutex) {
146+ CloseHandle(rmutex);
147+ rmutex = 0;
148+ }
149+ ReleaseMutex(wmutex);
150+ if (!ok)
151+ return false;
152+ }
153+ else {
154+ Q_ASSERT(rmutexes.isEmpty());
155+ for (int i = 0; i < MAX_READERS; i++) {
156+ Qt::HANDLE mutex = getMutexHandle(i, false);
157+ if (mutex)
158+ rmutexes.append(mutex);
159+ }
160+ if (rmutexes.size()) {
161+ DWORD res = WaitForMultipleObjects(rmutexes.size(), rmutexes.constData(),
162+ TRUE, block ? INFINITE : 0);
163+ if (res != WAIT_OBJECT_0 && res != WAIT_ABANDONED) {
164+ if (res != WAIT_TIMEOUT)
165+ qErrnoWarning("QtLockedFile::lock(): WaitForMultipleObjects failed");
166+ m_lock_mode = WriteLock; // trick unlock() to clean up - semiyucky
167+ unlock();
168+ return false;
169+ }
170+ }
171+ }
172+
173+ m_lock_mode = mode;
174+ return true;
175+}
176+
177+bool QtLockedFile::unlock()
178+{
179+ if (!isOpen()) {
180+ qWarning("QtLockedFile::unlock(): file is not opened");
181+ return false;
182+ }
183+
184+ if (!isLocked())
185+ return true;
186+
187+ if (m_lock_mode == ReadLock) {
188+ ReleaseMutex(rmutex);
189+ CloseHandle(rmutex);
190+ rmutex = 0;
191+ }
192+ else {
193+ foreach(Qt::HANDLE mutex, rmutexes) {
194+ ReleaseMutex(mutex);
195+ CloseHandle(mutex);
196+ }
197+ rmutexes.clear();
198+ ReleaseMutex(wmutex);
199+ }
200+
201+ m_lock_mode = QtLockedFile::NoLock;
202+ return true;
203+}
204+
205+QtLockedFile::~QtLockedFile()
206+{
207+ if (isOpen())
208+ unlock();
209+ if (wmutex)
210+ CloseHandle(wmutex);
211+}
diff -r d88d6eb1f9fe -r 60fe0c2787df qtsingleapplication/qtsingleapplication.cpp
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/qtsingleapplication/qtsingleapplication.cpp Sat Jul 04 06:14:08 2020 -0400
@@ -0,0 +1,347 @@
1+/****************************************************************************
2+**
3+** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
4+** Contact: http://www.qt-project.org/legal
5+**
6+** This file is part of the Qt Solutions component.
7+**
8+** $QT_BEGIN_LICENSE:BSD$
9+** You may use this file under the terms of the BSD license as follows:
10+**
11+** "Redistribution and use in source and binary forms, with or without
12+** modification, are permitted provided that the following conditions are
13+** met:
14+** * Redistributions of source code must retain the above copyright
15+** notice, this list of conditions and the following disclaimer.
16+** * Redistributions in binary form must reproduce the above copyright
17+** notice, this list of conditions and the following disclaimer in
18+** the documentation and/or other materials provided with the
19+** distribution.
20+** * Neither the name of Digia Plc and its Subsidiary(-ies) nor the names
21+** of its contributors may be used to endorse or promote products derived
22+** from this software without specific prior written permission.
23+**
24+**
25+** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
26+** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
27+** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
28+** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
29+** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
30+** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
31+** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
32+** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
33+** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
34+** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
35+** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
36+**
37+** $QT_END_LICENSE$
38+**
39+****************************************************************************/
40+
41+
42+#include "qtsingleapplication.h"
43+#include "qtlocalpeer.h"
44+#include <QWidget>
45+
46+
47+/*!
48+ \class QtSingleApplication qtsingleapplication.h
49+ \brief The QtSingleApplication class provides an API to detect and
50+ communicate with running instances of an application.
51+
52+ This class allows you to create applications where only one
53+ instance should be running at a time. I.e., if the user tries to
54+ launch another instance, the already running instance will be
55+ activated instead. Another usecase is a client-server system,
56+ where the first started instance will assume the role of server,
57+ and the later instances will act as clients of that server.
58+
59+ By default, the full path of the executable file is used to
60+ determine whether two processes are instances of the same
61+ application. You can also provide an explicit identifier string
62+ that will be compared instead.
63+
64+ The application should create the QtSingleApplication object early
65+ in the startup phase, and call isRunning() to find out if another
66+ instance of this application is already running. If isRunning()
67+ returns false, it means that no other instance is running, and
68+ this instance has assumed the role as the running instance. In
69+ this case, the application should continue with the initialization
70+ of the application user interface before entering the event loop
71+ with exec(), as normal.
72+
73+ The messageReceived() signal will be emitted when the running
74+ application receives messages from another instance of the same
75+ application. When a message is received it might be helpful to the
76+ user to raise the application so that it becomes visible. To
77+ facilitate this, QtSingleApplication provides the
78+ setActivationWindow() function and the activateWindow() slot.
79+
80+ If isRunning() returns true, another instance is already
81+ running. It may be alerted to the fact that another instance has
82+ started by using the sendMessage() function. Also data such as
83+ startup parameters (e.g. the name of the file the user wanted this
84+ new instance to open) can be passed to the running instance with
85+ this function. Then, the application should terminate (or enter
86+ client mode).
87+
88+ If isRunning() returns true, but sendMessage() fails, that is an
89+ indication that the running instance is frozen.
90+
91+ Here's an example that shows how to convert an existing
92+ application to use QtSingleApplication. It is very simple and does
93+ not make use of all QtSingleApplication's functionality (see the
94+ examples for that).
95+
96+ \code
97+ // Original
98+ int main(int argc, char **argv)
99+ {
100+ QApplication app(argc, argv);
101+
102+ MyMainWidget mmw;
103+ mmw.show();
104+ return app.exec();
105+ }
106+
107+ // Single instance
108+ int main(int argc, char **argv)
109+ {
110+ QtSingleApplication app(argc, argv);
111+
112+ if (app.isRunning())
113+ return !app.sendMessage(someDataString);
114+
115+ MyMainWidget mmw;
116+ app.setActivationWindow(&mmw);
117+ mmw.show();
118+ return app.exec();
119+ }
120+ \endcode
121+
122+ Once this QtSingleApplication instance is destroyed (normally when
123+ the process exits or crashes), when the user next attempts to run the
124+ application this instance will not, of course, be encountered. The
125+ next instance to call isRunning() or sendMessage() will assume the
126+ role as the new running instance.
127+
128+ For console (non-GUI) applications, QtSingleCoreApplication may be
129+ used instead of this class, to avoid the dependency on the QtGui
130+ library.
131+
132+ \sa QtSingleCoreApplication
133+*/
134+
135+
136+void QtSingleApplication::sysInit(const QString &appId)
137+{
138+ actWin = 0;
139+ peer = new QtLocalPeer(this, appId);
140+ connect(peer, SIGNAL(messageReceived(const QString&)), SIGNAL(messageReceived(const QString&)));
141+}
142+
143+
144+/*!
145+ Creates a QtSingleApplication object. The application identifier
146+ will be QCoreApplication::applicationFilePath(). \a argc, \a
147+ argv, and \a GUIenabled are passed on to the QAppliation constructor.
148+
149+ If you are creating a console application (i.e. setting \a
150+ GUIenabled to false), you may consider using
151+ QtSingleCoreApplication instead.
152+*/
153+
154+QtSingleApplication::QtSingleApplication(int &argc, char **argv, bool GUIenabled)
155+ : QApplication(argc, argv, GUIenabled)
156+{
157+ sysInit();
158+}
159+
160+
161+/*!
162+ Creates a QtSingleApplication object with the application
163+ identifier \a appId. \a argc and \a argv are passed on to the
164+ QAppliation constructor.
165+*/
166+
167+QtSingleApplication::QtSingleApplication(const QString &appId, int &argc, char **argv)
168+ : QApplication(argc, argv)
169+{
170+ sysInit(appId);
171+}
172+
173+#if QT_VERSION < 0x050000
174+
175+/*!
176+ Creates a QtSingleApplication object. The application identifier
177+ will be QCoreApplication::applicationFilePath(). \a argc, \a
178+ argv, and \a type are passed on to the QAppliation constructor.
179+*/
180+QtSingleApplication::QtSingleApplication(int &argc, char **argv, Type type)
181+ : QApplication(argc, argv, type)
182+{
183+ sysInit();
184+}
185+
186+
187+# if defined(Q_WS_X11)
188+/*!
189+ Special constructor for X11, ref. the documentation of
190+ QApplication's corresponding constructor. The application identifier
191+ will be QCoreApplication::applicationFilePath(). \a dpy, \a visual,
192+ and \a cmap are passed on to the QApplication constructor.
193+*/
194+QtSingleApplication::QtSingleApplication(Display* dpy, Qt::HANDLE visual, Qt::HANDLE cmap)
195+ : QApplication(dpy, visual, cmap)
196+{
197+ sysInit();
198+}
199+
200+/*!
201+ Special constructor for X11, ref. the documentation of
202+ QApplication's corresponding constructor. The application identifier
203+ will be QCoreApplication::applicationFilePath(). \a dpy, \a argc, \a
204+ argv, \a visual, and \a cmap are passed on to the QApplication
205+ constructor.
206+*/
207+QtSingleApplication::QtSingleApplication(Display *dpy, int &argc, char **argv, Qt::HANDLE visual, Qt::HANDLE cmap)
208+ : QApplication(dpy, argc, argv, visual, cmap)
209+{
210+ sysInit();
211+}
212+
213+/*!
214+ Special constructor for X11, ref. the documentation of
215+ QApplication's corresponding constructor. The application identifier
216+ will be \a appId. \a dpy, \a argc, \a
217+ argv, \a visual, and \a cmap are passed on to the QApplication
218+ constructor.
219+*/
220+QtSingleApplication::QtSingleApplication(Display* dpy, const QString &appId, int argc, char **argv, Qt::HANDLE visual, Qt::HANDLE cmap)
221+ : QApplication(dpy, argc, argv, visual, cmap)
222+{
223+ sysInit(appId);
224+}
225+# endif // Q_WS_X11
226+#endif // QT_VERSION < 0x050000
227+
228+
229+/*!
230+ Returns true if another instance of this application is running;
231+ otherwise false.
232+
233+ This function does not find instances of this application that are
234+ being run by a different user (on Windows: that are running in
235+ another session).
236+
237+ \sa sendMessage()
238+*/
239+
240+bool QtSingleApplication::isRunning()
241+{
242+ return peer->isClient();
243+}
244+
245+
246+/*!
247+ Tries to send the text \a message to the currently running
248+ instance. The QtSingleApplication object in the running instance
249+ will emit the messageReceived() signal when it receives the
250+ message.
251+
252+ This function returns true if the message has been sent to, and
253+ processed by, the current instance. If there is no instance
254+ currently running, or if the running instance fails to process the
255+ message within \a timeout milliseconds, this function return false.
256+
257+ \sa isRunning(), messageReceived()
258+*/
259+bool QtSingleApplication::sendMessage(const QString &message, int timeout)
260+{
261+ return peer->sendMessage(message, timeout);
262+}
263+
264+
265+/*!
266+ Returns the application identifier. Two processes with the same
267+ identifier will be regarded as instances of the same application.
268+*/
269+QString QtSingleApplication::id() const
270+{
271+ return peer->applicationId();
272+}
273+
274+
275+/*!
276+ Sets the activation window of this application to \a aw. The
277+ activation window is the widget that will be activated by
278+ activateWindow(). This is typically the application's main window.
279+
280+ If \a activateOnMessage is true (the default), the window will be
281+ activated automatically every time a message is received, just prior
282+ to the messageReceived() signal being emitted.
283+
284+ \sa activateWindow(), messageReceived()
285+*/
286+
287+void QtSingleApplication::setActivationWindow(QWidget* aw, bool activateOnMessage)
288+{
289+ actWin = aw;
290+ if (activateOnMessage)
291+ connect(peer, SIGNAL(messageReceived(const QString&)), this, SLOT(activateWindow()));
292+ else
293+ disconnect(peer, SIGNAL(messageReceived(const QString&)), this, SLOT(activateWindow()));
294+}
295+
296+
297+/*!
298+ Returns the applications activation window if one has been set by
299+ calling setActivationWindow(), otherwise returns 0.
300+
301+ \sa setActivationWindow()
302+*/
303+QWidget* QtSingleApplication::activationWindow() const
304+{
305+ return actWin;
306+}
307+
308+
309+/*!
310+ De-minimizes, raises, and activates this application's activation window.
311+ This function does nothing if no activation window has been set.
312+
313+ This is a convenience function to show the user that this
314+ application instance has been activated when he has tried to start
315+ another instance.
316+
317+ This function should typically be called in response to the
318+ messageReceived() signal. By default, that will happen
319+ automatically, if an activation window has been set.
320+
321+ \sa setActivationWindow(), messageReceived(), initialize()
322+*/
323+void QtSingleApplication::activateWindow()
324+{
325+ if (actWin) {
326+ actWin->setWindowState(actWin->windowState() & ~Qt::WindowMinimized);
327+ actWin->raise();
328+ actWin->activateWindow();
329+ }
330+}
331+
332+
333+/*!
334+ \fn void QtSingleApplication::messageReceived(const QString& message)
335+
336+ This signal is emitted when the current instance receives a \a
337+ message from another instance of this application.
338+
339+ \sa sendMessage(), setActivationWindow(), activateWindow()
340+*/
341+
342+
343+/*!
344+ \fn void QtSingleApplication::initialize(bool dummy = true)
345+
346+ \obsolete
347+*/
diff -r d88d6eb1f9fe -r 60fe0c2787df qtsingleapplication/qtsingleapplication.h
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/qtsingleapplication/qtsingleapplication.h Sat Jul 04 06:14:08 2020 -0400
@@ -0,0 +1,105 @@
1+/****************************************************************************
2+**
3+** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
4+** Contact: http://www.qt-project.org/legal
5+**
6+** This file is part of the Qt Solutions component.
7+**
8+** $QT_BEGIN_LICENSE:BSD$
9+** You may use this file under the terms of the BSD license as follows:
10+**
11+** "Redistribution and use in source and binary forms, with or without
12+** modification, are permitted provided that the following conditions are
13+** met:
14+** * Redistributions of source code must retain the above copyright
15+** notice, this list of conditions and the following disclaimer.
16+** * Redistributions in binary form must reproduce the above copyright
17+** notice, this list of conditions and the following disclaimer in
18+** the documentation and/or other materials provided with the
19+** distribution.
20+** * Neither the name of Digia Plc and its Subsidiary(-ies) nor the names
21+** of its contributors may be used to endorse or promote products derived
22+** from this software without specific prior written permission.
23+**
24+**
25+** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
26+** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
27+** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
28+** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
29+** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
30+** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
31+** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
32+** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
33+** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
34+** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
35+** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
36+**
37+** $QT_END_LICENSE$
38+**
39+****************************************************************************/
40+
41+#ifndef QTSINGLEAPPLICATION_H
42+#define QTSINGLEAPPLICATION_H
43+
44+#include <QApplication>
45+
46+class QtLocalPeer;
47+
48+#if defined(Q_OS_WIN)
49+# if !defined(QT_QTSINGLEAPPLICATION_EXPORT) && !defined(QT_QTSINGLEAPPLICATION_IMPORT)
50+# define QT_QTSINGLEAPPLICATION_EXPORT
51+# elif defined(QT_QTSINGLEAPPLICATION_IMPORT)
52+# if defined(QT_QTSINGLEAPPLICATION_EXPORT)
53+# undef QT_QTSINGLEAPPLICATION_EXPORT
54+# endif
55+# define QT_QTSINGLEAPPLICATION_EXPORT __declspec(dllimport)
56+# elif defined(QT_QTSINGLEAPPLICATION_EXPORT)
57+# undef QT_QTSINGLEAPPLICATION_EXPORT
58+# define QT_QTSINGLEAPPLICATION_EXPORT __declspec(dllexport)
59+# endif
60+#else
61+# define QT_QTSINGLEAPPLICATION_EXPORT
62+#endif
63+
64+class QT_QTSINGLEAPPLICATION_EXPORT QtSingleApplication : public QApplication
65+{
66+ Q_OBJECT
67+
68+public:
69+ QtSingleApplication(int &argc, char **argv, bool GUIenabled = true);
70+ QtSingleApplication(const QString &id, int &argc, char **argv);
71+#if QT_VERSION < 0x050000
72+ QtSingleApplication(int &argc, char **argv, Type type);
73+# if defined(Q_WS_X11)
74+ QtSingleApplication(Display* dpy, Qt::HANDLE visual = 0, Qt::HANDLE colormap = 0);
75+ QtSingleApplication(Display *dpy, int &argc, char **argv, Qt::HANDLE visual = 0, Qt::HANDLE cmap= 0);
76+ QtSingleApplication(Display* dpy, const QString &appId, int argc, char **argv, Qt::HANDLE visual = 0, Qt::HANDLE colormap = 0);
77+# endif // Q_WS_X11
78+#endif // QT_VERSION < 0x050000
79+
80+ bool isRunning();
81+ QString id() const;
82+
83+ void setActivationWindow(QWidget* aw, bool activateOnMessage = true);
84+ QWidget* activationWindow() const;
85+
86+ // Obsolete:
87+ void initialize(bool dummy = true)
88+ { isRunning(); Q_UNUSED(dummy) }
89+
90+public Q_SLOTS:
91+ bool sendMessage(const QString &message, int timeout = 5000);
92+ void activateWindow();
93+
94+
95+Q_SIGNALS:
96+ void messageReceived(const QString &message);
97+
98+
99+private:
100+ void sysInit(const QString &appId = QString());
101+ QtLocalPeer *peer;
102+ QWidget *actWin;
103+};
104+
105+#endif // QTSINGLEAPPLICATION_H
diff -r d88d6eb1f9fe -r 60fe0c2787df qtsingleapplication/qtsingleapplication.pri
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/qtsingleapplication/qtsingleapplication.pri Sat Jul 04 06:14:08 2020 -0400
@@ -0,0 +1,17 @@
1+include(../common.pri)
2+INCLUDEPATH += $$PWD
3+DEPENDPATH += $$PWD
4+QT *= network
5+greaterThan(QT_MAJOR_VERSION, 4): QT *= widgets
6+
7+qtsingleapplication-uselib:!qtsingleapplication-buildlib {
8+ LIBS += -L$$QTSINGLEAPPLICATION_LIBDIR -l$$QTSINGLEAPPLICATION_LIBNAME
9+} else {
10+ SOURCES += $$PWD/qtsingleapplication.cpp $$PWD/qtlocalpeer.cpp
11+ HEADERS += $$PWD/qtsingleapplication.h $$PWD/qtlocalpeer.h
12+}
13+
14+win32 {
15+ contains(TEMPLATE, lib):contains(CONFIG, shared):DEFINES += QT_QTSINGLEAPPLICATION_EXPORT
16+ else:qtsingleapplication-uselib:DEFINES += QT_QTSINGLEAPPLICATION_IMPORT
17+}
diff -r d88d6eb1f9fe -r 60fe0c2787df qtsingleapplication/qtsinglecoreapplication.cpp
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/qtsingleapplication/qtsinglecoreapplication.cpp Sat Jul 04 06:14:08 2020 -0400
@@ -0,0 +1,149 @@
1+/****************************************************************************
2+**
3+** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
4+** Contact: http://www.qt-project.org/legal
5+**
6+** This file is part of the Qt Solutions component.
7+**
8+** $QT_BEGIN_LICENSE:BSD$
9+** You may use this file under the terms of the BSD license as follows:
10+**
11+** "Redistribution and use in source and binary forms, with or without
12+** modification, are permitted provided that the following conditions are
13+** met:
14+** * Redistributions of source code must retain the above copyright
15+** notice, this list of conditions and the following disclaimer.
16+** * Redistributions in binary form must reproduce the above copyright
17+** notice, this list of conditions and the following disclaimer in
18+** the documentation and/or other materials provided with the
19+** distribution.
20+** * Neither the name of Digia Plc and its Subsidiary(-ies) nor the names
21+** of its contributors may be used to endorse or promote products derived
22+** from this software without specific prior written permission.
23+**
24+**
25+** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
26+** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
27+** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
28+** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
29+** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
30+** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
31+** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
32+** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
33+** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
34+** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
35+** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
36+**
37+** $QT_END_LICENSE$
38+**
39+****************************************************************************/
40+
41+
42+#include "qtsinglecoreapplication.h"
43+#include "qtlocalpeer.h"
44+
45+/*!
46+ \class QtSingleCoreApplication qtsinglecoreapplication.h
47+ \brief A variant of the QtSingleApplication class for non-GUI applications.
48+
49+ This class is a variant of QtSingleApplication suited for use in
50+ console (non-GUI) applications. It is an extension of
51+ QCoreApplication (instead of QApplication). It does not require
52+ the QtGui library.
53+
54+ The API and usage is identical to QtSingleApplication, except that
55+ functions relating to the "activation window" are not present, for
56+ obvious reasons. Please refer to the QtSingleApplication
57+ documentation for explanation of the usage.
58+
59+ A QtSingleCoreApplication instance can communicate to a
60+ QtSingleApplication instance if they share the same application
61+ id. Hence, this class can be used to create a light-weight
62+ command-line tool that sends commands to a GUI application.
63+
64+ \sa QtSingleApplication
65+*/
66+
67+/*!
68+ Creates a QtSingleCoreApplication object. The application identifier
69+ will be QCoreApplication::applicationFilePath(). \a argc and \a
70+ argv are passed on to the QCoreAppliation constructor.
71+*/
72+
73+QtSingleCoreApplication::QtSingleCoreApplication(int &argc, char **argv)
74+ : QCoreApplication(argc, argv)
75+{
76+ peer = new QtLocalPeer(this);
77+ connect(peer, SIGNAL(messageReceived(const QString&)), SIGNAL(messageReceived(const QString&)));
78+}
79+
80+
81+/*!
82+ Creates a QtSingleCoreApplication object with the application
83+ identifier \a appId. \a argc and \a argv are passed on to the
84+ QCoreAppliation constructor.
85+*/
86+QtSingleCoreApplication::QtSingleCoreApplication(const QString &appId, int &argc, char **argv)
87+ : QCoreApplication(argc, argv)
88+{
89+ peer = new QtLocalPeer(this, appId);
90+ connect(peer, SIGNAL(messageReceived(const QString&)), SIGNAL(messageReceived(const QString&)));
91+}
92+
93+
94+/*!
95+ Returns true if another instance of this application is running;
96+ otherwise false.
97+
98+ This function does not find instances of this application that are
99+ being run by a different user (on Windows: that are running in
100+ another session).
101+
102+ \sa sendMessage()
103+*/
104+
105+bool QtSingleCoreApplication::isRunning()
106+{
107+ return peer->isClient();
108+}
109+
110+
111+/*!
112+ Tries to send the text \a message to the currently running
113+ instance. The QtSingleCoreApplication object in the running instance
114+ will emit the messageReceived() signal when it receives the
115+ message.
116+
117+ This function returns true if the message has been sent to, and
118+ processed by, the current instance. If there is no instance
119+ currently running, or if the running instance fails to process the
120+ message within \a timeout milliseconds, this function return false.
121+
122+ \sa isRunning(), messageReceived()
123+*/
124+
125+bool QtSingleCoreApplication::sendMessage(const QString &message, int timeout)
126+{
127+ return peer->sendMessage(message, timeout);
128+}
129+
130+
131+/*!
132+ Returns the application identifier. Two processes with the same
133+ identifier will be regarded as instances of the same application.
134+*/
135+
136+QString QtSingleCoreApplication::id() const
137+{
138+ return peer->applicationId();
139+}
140+
141+
142+/*!
143+ \fn void QtSingleCoreApplication::messageReceived(const QString& message)
144+
145+ This signal is emitted when the current instance receives a \a
146+ message from another instance of this application.
147+
148+ \sa sendMessage()
149+*/
diff -r d88d6eb1f9fe -r 60fe0c2787df qtsingleapplication/qtsinglecoreapplication.h
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/qtsingleapplication/qtsinglecoreapplication.h Sat Jul 04 06:14:08 2020 -0400
@@ -0,0 +1,71 @@
1+/****************************************************************************
2+**
3+** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
4+** Contact: http://www.qt-project.org/legal
5+**
6+** This file is part of the Qt Solutions component.
7+**
8+** $QT_BEGIN_LICENSE:BSD$
9+** You may use this file under the terms of the BSD license as follows:
10+**
11+** "Redistribution and use in source and binary forms, with or without
12+** modification, are permitted provided that the following conditions are
13+** met:
14+** * Redistributions of source code must retain the above copyright
15+** notice, this list of conditions and the following disclaimer.
16+** * Redistributions in binary form must reproduce the above copyright
17+** notice, this list of conditions and the following disclaimer in
18+** the documentation and/or other materials provided with the
19+** distribution.
20+** * Neither the name of Digia Plc and its Subsidiary(-ies) nor the names
21+** of its contributors may be used to endorse or promote products derived
22+** from this software without specific prior written permission.
23+**
24+**
25+** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
26+** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
27+** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
28+** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
29+** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
30+** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
31+** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
32+** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
33+** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
34+** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
35+** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
36+**
37+** $QT_END_LICENSE$
38+**
39+****************************************************************************/
40+
41+#ifndef QTSINGLECOREAPPLICATION_H
42+#define QTSINGLECOREAPPLICATION_H
43+
44+#include <QCoreApplication>
45+
46+class QtLocalPeer;
47+
48+class QtSingleCoreApplication : public QCoreApplication
49+{
50+ Q_OBJECT
51+
52+public:
53+ QtSingleCoreApplication(int &argc, char **argv);
54+ QtSingleCoreApplication(const QString &id, int &argc, char **argv);
55+
56+ bool isRunning();
57+ QString id() const;
58+
59+public Q_SLOTS:
60+ bool sendMessage(const QString &message, int timeout = 5000);
61+
62+
63+Q_SIGNALS:
64+ void messageReceived(const QString &message);
65+
66+
67+private:
68+ QtLocalPeer* peer;
69+};
70+
71+#endif // QTSINGLECOREAPPLICATION_H
diff -r d88d6eb1f9fe -r 60fe0c2787df qtsingleapplication/qtsinglecoreapplication.pri
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/qtsingleapplication/qtsinglecoreapplication.pri Sat Jul 04 06:14:08 2020 -0400
@@ -0,0 +1,10 @@
1+INCLUDEPATH += $$PWD
2+DEPENDPATH += $$PWD
3+HEADERS += $$PWD/qtsinglecoreapplication.h $$PWD/qtlocalpeer.h
4+SOURCES += $$PWD/qtsinglecoreapplication.cpp $$PWD/qtlocalpeer.cpp
5+
6+QT *= network
7+
8+win32:contains(TEMPLATE, lib):contains(CONFIG, shared) {
9+ DEFINES += QT_QTSINGLECOREAPPLICATION_EXPORT=__declspec(dllexport)
10+}
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