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feat(singleApp): remove private QLockFile implementation

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* QLockFile is part of Qt since 5.1
This commit is contained in:
shenleban tongying 2023-04-19 21:03:31 -04:00 committed by xiaoyifang
parent 664d6b1483
commit fcbb5ae8a2
9 changed files with 38 additions and 665 deletions
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4
CMakeLists.txt
View file

@ -120,8 +120,6 @@ set(QSINGLEAPP_SOURCE_FILES
thirdparty/qtsingleapplication/src/qtlocalpeer.h
thirdparty/qtsingleapplication/src/qtsingleapplication.cpp
thirdparty/qtsingleapplication/src/qtsingleapplication.h
thirdparty/qtsingleapplication/src/qtsinglecoreapplication.cpp
thirdparty/qtsingleapplication/src/qtsinglecoreapplication.h
)
qt_add_executable(${CMAKE_PROJECT_NAME}
@ -248,7 +246,7 @@ set_target_properties(${CMAKE_PROJECT_NAME} PROPERTIES
MACOSX_BUNDLE_BUNDLE_VERSION ${PROJECT_VERSION}
MACOSX_BUNDLE_SHORT_VERSION_STRING ${PROJECT_VERSION_MAJOR}.${PROJECT_VERSION_MINOR}
MACOSX_BUNDLE TRUE
WIN32_EXECUTABLE TRUE
# WIN32_EXECUTABLE TRUE # TODO: this will prevent any qDebug() from showing up.
)
install(TARGETS ${CMAKE_PROJECT_NAME}

1
thirdparty/qtsingleapplication/src/QtLockedFile vendored
View file

@ -1 +0,0 @@
#include "qtlockedfile.h"

33
thirdparty/qtsingleapplication/src/qtlocalpeer.cpp vendored
View file

@ -41,7 +41,6 @@
#include "qtlocalpeer.h"
#include <QCoreApplication>
#include <QTime>
#include <QDataStream>
#if defined(Q_OS_WIN)
@ -51,21 +50,12 @@ typedef BOOL(WINAPI*PProcessIdToSessionId)(DWORD,DWORD*);
static PProcessIdToSessionId pProcessIdToSessionId = 0;
#endif
#if defined(Q_OS_UNIX)
#include <sys/types.h>
#include <time.h>
#include <ctime>
#include <unistd.h>
#endif
#include <QRegularExpression>
namespace QtLP_Private {
#include "qtlockedfile.cpp"
#if defined(Q_OS_WIN)
#include "qtlockedfile_win.cpp"
#else
#include "qtlockedfile_unix.cpp"
#endif
}
const char* QtLocalPeer::ack = "ack";
@ -105,18 +95,21 @@ QtLocalPeer::QtLocalPeer(QObject* parent, const QString &appId)
server = new QLocalServer(this);
QString lockName = QDir(QDir::tempPath()).absolutePath()
+ QLatin1Char('/') + socketName
+ QLatin1String("-lockfile");
lockFile.setFileName(lockName);
lockFile.open(QIODevice::ReadWrite);
+ QLatin1String("-gdlockfile");
lockFile = new QLockFile(lockName);
lockFile->setStaleLockTime(0);
if ( !lockFile->tryLock( 0 ) ) {
if ( lockFile->error() != QLockFile::NoError && lockFile->error() != QLockFile::LockFailedError ) {
qWarning() << "QLockFile error: " << lockFile->error();
}
}
}
bool QtLocalPeer::isClient()
{
if (lockFile.isLocked())
return false;
if (!lockFile.lock(QtLP_Private::QtLockedFile::WriteLock, false))
if ( !lockFile->isLocked() ) {
return true;
}
bool res = server->listen(socketName);
#if defined(Q_OS_UNIX) && (QT_VERSION >= QT_VERSION_CHECK(4,5,0))
@ -199,3 +192,7 @@ void QtLocalPeer::receiveConnection()
delete socket;
emit messageReceived(message); //### (might take a long time to return)
}
QtLocalPeer::~QtLocalPeer() {
lockFile->unlock(); // Ensure file unlocked
}

39
thirdparty/qtsingleapplication/src/qtlocalpeer.h vendored
View file

@ -41,37 +41,40 @@
#ifndef QTLOCALPEER_H
#define QTLOCALPEER_H
#include <QLockFile>
#include <QLocalServer>
#include <QLocalSocket>
#include <QDir>
#include "qtlockedfile.h"
class QtLocalPeer : public QObject
class QtLocalPeer: public QObject
{
Q_OBJECT
Q_OBJECT
public:
QtLocalPeer(QObject *parent = 0, const QString &appId = QString());
bool isClient();
bool sendMessage(const QString &message, int timeout);
QString applicationId() const
{ return id; }
explicit QtLocalPeer( QObject * parent = nullptr, const QString & appId = QString() );
~QtLocalPeer();
Q_SIGNALS:
void messageReceived(const QString &message);
bool isClient();
bool sendMessage( const QString & message, int timeout );
QString applicationId() const
{
return id;
}
protected Q_SLOTS:
void receiveConnection();
signals:
void messageReceived( const QString & message );
protected:
QString id;
QString socketName;
QLocalServer* server;
QtLP_Private::QtLockedFile lockFile;
protected slots:
void receiveConnection();
private:
static const char* ack;
QString id;
QString socketName;
QLocalServer * server;
QLockFile * lockFile;
static const char * ack;
};
#endif // QTLOCALPEER_H

197
thirdparty/qtsingleapplication/src/qtlockedfile.cpp vendored
View file

@ -1,197 +0,0 @@
/****************************************************************************
**
** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part of the Qt Solutions component.
**
** $QT_BEGIN_LICENSE:BSD$
** You may use this file under the terms of the BSD license as follows:
**
** "Redistribution and use in source and binary forms, with or without
** modification, are permitted provided that the following conditions are
** met:
** * Redistributions of source code must retain the above copyright
** notice, this list of conditions and the following disclaimer.
** * Redistributions in binary form must reproduce the above copyright
** notice, this list of conditions and the following disclaimer in
** the documentation and/or other materials provided with the
** distribution.
** * Neither the name of Digia Plc and its Subsidiary(-ies) nor the names
** of its contributors may be used to endorse or promote products derived
** from this software without specific prior written permission.
**
**
** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include "qtlockedfile.h"
#ifdef CMAKE_USED_HACK
using namespace QtLP_Private;
#endif
/*!
\class QtLockedFile
\brief The QtLockedFile class extends QFile with advisory locking
functions.
A file may be locked in read or write mode. Multiple instances of
\e QtLockedFile, created in multiple processes running on the same
machine, may have a file locked in read mode. Exactly one instance
may have it locked in write mode. A read and a write lock cannot
exist simultaneously on the same file.
The file locks are advisory. This means that nothing prevents
another process from manipulating a locked file using QFile or
file system functions offered by the OS. Serialization is only
guaranteed if all processes that access the file use
QLockedFile. Also, while holding a lock on a file, a process
must not open the same file again (through any API), or locks
can be unexpectedly lost.
The lock provided by an instance of \e QtLockedFile is released
whenever the program terminates. This is true even when the
program crashes and no destructors are called.
*/
/*! \enum QtLockedFile::LockMode
This enum describes the available lock modes.
\value ReadLock A read lock.
\value WriteLock A write lock.
\value NoLock Neither a read lock nor a write lock.
*/
/*!
Constructs an unlocked \e QtLockedFile object. This constructor
behaves in the same way as \e QFile::QFile().
\sa QFile::QFile()
*/
QtLockedFile::QtLockedFile()
: QFile()
{
#ifdef Q_OS_WIN
wmutex = 0;
rmutex = 0;
#endif
m_lock_mode = NoLock;
}
/*!
Constructs an unlocked QtLockedFile object with file \a name. This
constructor behaves in the same way as \e QFile::QFile(const
QString&).
\sa QFile::QFile()
*/
QtLockedFile::QtLockedFile(const QString &name)
: QFile(name)
{
#ifdef Q_OS_WIN
wmutex = 0;
rmutex = 0;
#endif
m_lock_mode = NoLock;
}
/*!
Opens the file in OpenMode \a mode.
This is identical to QFile::open(), with the one exception that the
Truncate mode flag is disallowed. Truncation would conflict with the
advisory file locking, since the file would be modified before the
write lock is obtained. If truncation is required, use resize(0)
after obtaining the write lock.
Returns true if successful; otherwise false.
\sa QFile::open(), QFile::resize()
*/
bool QtLockedFile::open(OpenMode mode)
{
if (mode & QIODevice::Truncate) {
qWarning("QtLockedFile::open(): Truncate mode not allowed.");
return false;
}
return QFile::open(mode);
}
/*!
Returns \e true if this object has a in read or write lock;
otherwise returns \e false.
\sa lockMode()
*/
bool QtLockedFile::isLocked() const
{
return m_lock_mode != NoLock;
}
/*!
Returns the type of lock currently held by this object, or \e
QtLockedFile::NoLock.
\sa isLocked()
*/
QtLockedFile::LockMode QtLockedFile::lockMode() const
{
return m_lock_mode;
}
/*!
\fn bool QtLockedFile::lock(LockMode mode, bool block = true)
Obtains a lock of type \a mode. The file must be opened before it
can be locked.
If \a block is true, this function will block until the lock is
aquired. If \a block is false, this function returns \e false
immediately if the lock cannot be aquired.
If this object already has a lock of type \a mode, this function
returns \e true immediately. If this object has a lock of a
different type than \a mode, the lock is first released and then a
new lock is obtained.
This function returns \e true if, after it executes, the file is
locked by this object, and \e false otherwise.
\sa unlock(), isLocked(), lockMode()
*/
/*!
\fn bool QtLockedFile::unlock()
Releases a lock.
If the object has no lock, this function returns immediately.
This function returns \e true if, after it executes, the file is
not locked by this object, and \e false otherwise.
\sa lock(), isLocked(), lockMode()
*/
/*!
\fn QtLockedFile::~QtLockedFile()
Destroys the \e QtLockedFile object. If any locks were held, they
are released.
*/

97
thirdparty/qtsingleapplication/src/qtlockedfile.h vendored
View file

@ -1,97 +0,0 @@
/****************************************************************************
**
** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part of the Qt Solutions component.
**
** $QT_BEGIN_LICENSE:BSD$
** You may use this file under the terms of the BSD license as follows:
**
** "Redistribution and use in source and binary forms, with or without
** modification, are permitted provided that the following conditions are
** met:
** * Redistributions of source code must retain the above copyright
** notice, this list of conditions and the following disclaimer.
** * Redistributions in binary form must reproduce the above copyright
** notice, this list of conditions and the following disclaimer in
** the documentation and/or other materials provided with the
** distribution.
** * Neither the name of Digia Plc and its Subsidiary(-ies) nor the names
** of its contributors may be used to endorse or promote products derived
** from this software without specific prior written permission.
**
**
** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
**
** $QT_END_LICENSE$
**
****************************************************************************/
#ifndef QTLOCKEDFILE_H
#define QTLOCKEDFILE_H
#include <QFile>
#ifdef Q_OS_WIN
#include <QVector>
#endif
#if defined(Q_OS_WIN)
# if !defined(QT_QTLOCKEDFILE_EXPORT) && !defined(QT_QTLOCKEDFILE_IMPORT)
# define QT_QTLOCKEDFILE_EXPORT
# elif defined(QT_QTLOCKEDFILE_IMPORT)
# if defined(QT_QTLOCKEDFILE_EXPORT)
# undef QT_QTLOCKEDFILE_EXPORT
# endif
# define QT_QTLOCKEDFILE_EXPORT __declspec(dllimport)
# elif defined(QT_QTLOCKEDFILE_EXPORT)
# undef QT_QTLOCKEDFILE_EXPORT
# define QT_QTLOCKEDFILE_EXPORT __declspec(dllexport)
# endif
#else
# define QT_QTLOCKEDFILE_EXPORT
#endif
namespace QtLP_Private {
class QT_QTLOCKEDFILE_EXPORT QtLockedFile : public QFile
{
public:
enum LockMode { NoLock = 0, ReadLock, WriteLock };
QtLockedFile();
QtLockedFile(const QString &name);
~QtLockedFile();
bool open(OpenMode mode);
bool lock(LockMode mode, bool block = true);
bool unlock();
bool isLocked() const;
LockMode lockMode() const;
private:
#ifdef Q_OS_WIN
Qt::HANDLE wmutex;
Qt::HANDLE rmutex;
QVector<Qt::HANDLE> rmutexes;
QString mutexname;
Qt::HANDLE getMutexHandle(int idx, bool doCreate);
bool waitMutex(Qt::HANDLE mutex, bool doBlock);
#endif
LockMode m_lock_mode;
};
}
#endif

119
thirdparty/qtsingleapplication/src/qtlockedfile_unix.cpp vendored
View file

@ -1,119 +0,0 @@
/****************************************************************************
**
** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part of the Qt Solutions component.
**
** $QT_BEGIN_LICENSE:BSD$
** You may use this file under the terms of the BSD license as follows:
**
** "Redistribution and use in source and binary forms, with or without
** modification, are permitted provided that the following conditions are
** met:
** * Redistributions of source code must retain the above copyright
** notice, this list of conditions and the following disclaimer.
** * Redistributions in binary form must reproduce the above copyright
** notice, this list of conditions and the following disclaimer in
** the documentation and/or other materials provided with the
** distribution.
** * Neither the name of Digia Plc and its Subsidiary(-ies) nor the names
** of its contributors may be used to endorse or promote products derived
** from this software without specific prior written permission.
**
**
** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include <string.h>
#include <errno.h>
#include <unistd.h>
#include <fcntl.h>
#include "qtlockedfile.h"
#ifdef CMAKE_USED_HACK
using namespace QtLP_Private;
#endif
bool QtLockedFile::lock(LockMode mode, bool block)
{
if (!isOpen()) {
qWarning("QtLockedFile::lock(): file is not opened");
return false;
}
if (mode == NoLock)
return unlock();
if (mode == m_lock_mode)
return true;
if (m_lock_mode != NoLock)
unlock();
struct flock fl;
fl.l_whence = SEEK_SET;
fl.l_start = 0;
fl.l_len = 0;
fl.l_type = (mode == ReadLock) ? F_RDLCK : F_WRLCK;
int cmd = block ? F_SETLKW : F_SETLK;
int ret = fcntl(handle(), cmd, &fl);
if (ret == -1) {
if (errno != EINTR && errno != EAGAIN)
qWarning("QtLockedFile::lock(): fcntl: %s", strerror(errno));
return false;
}
m_lock_mode = mode;
return true;
}
bool QtLockedFile::unlock()
{
if (!isOpen()) {
qWarning("QtLockedFile::unlock(): file is not opened");
return false;
}
if (!isLocked())
return true;
struct flock fl;
fl.l_whence = SEEK_SET;
fl.l_start = 0;
fl.l_len = 0;
fl.l_type = F_UNLCK;
int ret = fcntl(handle(), F_SETLKW, &fl);
if (ret == -1) {
qWarning("QtLockedFile::lock(): fcntl: %s", strerror(errno));
return false;
}
m_lock_mode = NoLock;
return true;
}
QtLockedFile::~QtLockedFile()
{
if (isOpen())
unlock();
}

211
thirdparty/qtsingleapplication/src/qtlockedfile_win.cpp vendored
View file

@ -1,211 +0,0 @@
/****************************************************************************
**
** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part of the Qt Solutions component.
**
** $QT_BEGIN_LICENSE:BSD$
** You may use this file under the terms of the BSD license as follows:
**
** "Redistribution and use in source and binary forms, with or without
** modification, are permitted provided that the following conditions are
** met:
** * Redistributions of source code must retain the above copyright
** notice, this list of conditions and the following disclaimer.
** * Redistributions in binary form must reproduce the above copyright
** notice, this list of conditions and the following disclaimer in
** the documentation and/or other materials provided with the
** distribution.
** * Neither the name of Digia Plc and its Subsidiary(-ies) nor the names
** of its contributors may be used to endorse or promote products derived
** from this software without specific prior written permission.
**
**
** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include "qtlockedfile.h"
#include <qt_windows.h>
#include <QFileInfo>
#define MUTEX_PREFIX "QtLockedFile mutex "
// Maximum number of concurrent read locks. Must not be greater than MAXIMUM_WAIT_OBJECTS
#define MAX_READERS MAXIMUM_WAIT_OBJECTS
#if QT_VERSION >= 0x050000
#define QT_WA(unicode, ansi) unicode
#endif
Qt::HANDLE QtLockedFile::getMutexHandle(int idx, bool doCreate)
{
if (mutexname.isEmpty()) {
QFileInfo fi(*this);
mutexname = QString::fromLatin1(MUTEX_PREFIX)
+ fi.absoluteFilePath().toLower();
}
QString mname(mutexname);
if (idx >= 0)
mname += QString::number(idx);
Qt::HANDLE mutex;
if (doCreate) {
QT_WA( { mutex = CreateMutexW(NULL, FALSE, (TCHAR*)mname.utf16()); },
{ mutex = CreateMutexA(NULL, FALSE, mname.toLocal8Bit().constData()); } );
if (!mutex) {
qErrnoWarning("QtLockedFile::lock(): CreateMutex failed");
return 0;
}
}
else {
QT_WA( { mutex = OpenMutexW(SYNCHRONIZE | MUTEX_MODIFY_STATE, FALSE, (TCHAR*)mname.utf16()); },
{ mutex = OpenMutexA(SYNCHRONIZE | MUTEX_MODIFY_STATE, FALSE, mname.toLocal8Bit().constData()); } );
if (!mutex) {
if (GetLastError() != ERROR_FILE_NOT_FOUND)
qErrnoWarning("QtLockedFile::lock(): OpenMutex failed");
return 0;
}
}
return mutex;
}
bool QtLockedFile::waitMutex(Qt::HANDLE mutex, bool doBlock)
{
Q_ASSERT(mutex);
DWORD res = WaitForSingleObject(mutex, doBlock ? INFINITE : 0);
switch (res) {
case WAIT_OBJECT_0:
case WAIT_ABANDONED:
return true;
break;
case WAIT_TIMEOUT:
break;
default:
qErrnoWarning("QtLockedFile::lock(): WaitForSingleObject failed");
}
return false;
}
bool QtLockedFile::lock(LockMode mode, bool block)
{
if (!isOpen()) {
qWarning("QtLockedFile::lock(): file is not opened");
return false;
}
if (mode == NoLock)
return unlock();
if (mode == m_lock_mode)
return true;
if (m_lock_mode != NoLock)
unlock();
if (!wmutex && !(wmutex = getMutexHandle(-1, true)))
return false;
if (!waitMutex(wmutex, block))
return false;
if (mode == ReadLock) {
int idx = 0;
for (; idx < MAX_READERS; idx++) {
rmutex = getMutexHandle(idx, false);
if (!rmutex || waitMutex(rmutex, false))
break;
CloseHandle(rmutex);
}
bool ok = true;
if (idx >= MAX_READERS) {
qWarning("QtLockedFile::lock(): too many readers");
rmutex = 0;
ok = false;
}
else if (!rmutex) {
rmutex = getMutexHandle(idx, true);
if (!rmutex || !waitMutex(rmutex, false))
ok = false;
}
if (!ok && rmutex) {
CloseHandle(rmutex);
rmutex = 0;
}
ReleaseMutex(wmutex);
if (!ok)
return false;
}
else {
Q_ASSERT(rmutexes.isEmpty());
for (int i = 0; i < MAX_READERS; i++) {
Qt::HANDLE mutex = getMutexHandle(i, false);
if (mutex)
rmutexes.append(mutex);
}
if (rmutexes.size()) {
DWORD res = WaitForMultipleObjects(rmutexes.size(), rmutexes.constData(),
TRUE, block ? INFINITE : 0);
if (res != WAIT_OBJECT_0 && res != WAIT_ABANDONED) {
if (res != WAIT_TIMEOUT)
qErrnoWarning("QtLockedFile::lock(): WaitForMultipleObjects failed");
m_lock_mode = WriteLock; // trick unlock() to clean up - semiyucky
unlock();
return false;
}
}
}
m_lock_mode = mode;
return true;
}
bool QtLockedFile::unlock()
{
if (!isOpen()) {
qWarning("QtLockedFile::unlock(): file is not opened");
return false;
}
if (!isLocked())
return true;
if (m_lock_mode == ReadLock) {
ReleaseMutex(rmutex);
CloseHandle(rmutex);
rmutex = 0;
}
else {
foreach(Qt::HANDLE mutex, rmutexes) {
ReleaseMutex(mutex);
CloseHandle(mutex);
}
rmutexes.clear();
ReleaseMutex(wmutex);
}
m_lock_mode = QtLockedFile::NoLock;
return true;
}
QtLockedFile::~QtLockedFile()
{
if (isOpen())
unlock();
if (wmutex)
CloseHandle(wmutex);
}

2
thirdparty/qtsingleapplication/src/qtsingleapplication.pri vendored
View file

@ -1,5 +1,5 @@
QT += core network widgets
CONFIG += c++11
CONFIG += c++17
INCLUDEPATH += $$PWD
DEPENDPATH += $$PWD