From 39224c7bf72a6e371356e1e23cc4574d3a18116b Mon Sep 17 00:00:00 2001
From: pokamest <pokamest@gmail.com>
Date: Wed, 24 Feb 2021 13:38:23 -0800
Subject: [PATCH] SingleApplication

---
 .../3rd/SingleApplication/singleapplication.h |  2 +-
 client/client.pro                             |  2 -
 client/main.cpp                               | 12 +--
 client/runguard.cpp                           | 88 -------------------
 client/runguard.h                             | 37 --------
 5 files changed, 2 insertions(+), 139 deletions(-)
 delete mode 100644 client/runguard.cpp
 delete mode 100644 client/runguard.h

diff --git a/client/3rd/SingleApplication/singleapplication.h b/client/3rd/SingleApplication/singleapplication.h
index 91cabf93..400c88ac 100644
--- a/client/3rd/SingleApplication/singleapplication.h
+++ b/client/3rd/SingleApplication/singleapplication.h
@@ -27,7 +27,7 @@
 #include <QtNetwork/QLocalSocket>
 
 #ifndef QAPPLICATION_CLASS
-  #define QAPPLICATION_CLASS QCoreApplication
+  #define QAPPLICATION_CLASS QApplication
 #endif
 
 #include QT_STRINGIFY(QAPPLICATION_CLASS)
diff --git a/client/client.pro b/client/client.pro
index c6096816..3f913186 100644
--- a/client/client.pro
+++ b/client/client.pro
@@ -21,7 +21,6 @@ HEADERS  += \
     defines.h \
     managementserver.h \
     protocols/shadowsocksvpnprotocol.h \
-    runguard.h \
     settings.h \
     ui/Controls/SlidingStackedWidget.h \
     ui/mainwindow.h \
@@ -39,7 +38,6 @@ SOURCES  += \
     main.cpp \
     managementserver.cpp \
     protocols/shadowsocksvpnprotocol.cpp \
-    runguard.cpp \
     settings.cpp \
     ui/Controls/SlidingStackedWidget.cpp \
     ui/mainwindow.cpp \
diff --git a/client/main.cpp b/client/main.cpp
index e3d28845..f08e66d4 100644
--- a/client/main.cpp
+++ b/client/main.cpp
@@ -6,13 +6,10 @@
 
 #include "debug.h"
 #include "defines.h"
-#include "runguard.h"
+#include "singleapplication.h"
 
 #include "ui/mainwindow.h"
 
-#define QAPPLICATION_CLASS QApplication
-#include "singleapplication.h"
-
 #ifdef Q_OS_WIN
 #include "Windows.h"
 #endif
@@ -28,7 +25,6 @@ static void loadTranslator()
 int main(int argc, char *argv[])
 {
     QGuiApplication::setAttribute(Qt::AA_EnableHighDpiScaling, true);
-    //RunGuard::instance(APPLICATION_NAME).activate();
 
 #ifdef Q_OS_WIN
     AllowSetForegroundWindow(ASFW_ANY);
@@ -42,12 +38,6 @@ int main(int argc, char *argv[])
 
     loadTranslator();
 
-//    if (!RunGuard::instance().tryToRun()) {
-//        qDebug() << "Tried to run second instance. Exiting...";
-//        QMessageBox::information(NULL, QObject::tr("Notification"), QObject::tr("AmneziaVPN is already running."));
-//        return 0;
-//    }
-
     QFontDatabase::addApplicationFont(":/fonts/Lato-Black.ttf");
     QFontDatabase::addApplicationFont(":/fonts/Lato-BlackItalic.ttf");
     QFontDatabase::addApplicationFont(":/fonts/Lato-Bold.ttf");
diff --git a/client/runguard.cpp b/client/runguard.cpp
deleted file mode 100644
index 729c7ece..00000000
--- a/client/runguard.cpp
+++ /dev/null
@@ -1,88 +0,0 @@
-#include "runguard.h"
-#include <QCryptographicHash>
-
-namespace
-{
-
-QString generateKeyHash( const QString& key, const QString& salt )
-{
-    QByteArray data;
-
-    data.append( key.toUtf8() );
-    data.append( salt.toUtf8() );
-    data = QCryptographicHash::hash( data, QCryptographicHash::Sha1 ).toHex();
-
-    return data;
-}
-
-}
-
-RunGuard::RunGuard(const QString& key)
-    : key( key )
-    , memLockKey( generateKeyHash( key, "_memLockKey" ) )
-    , sharedmemKey( generateKeyHash( key, "_sharedmemKey" ) )
-    , sharedMem( sharedmemKey )
-    , memLock( memLockKey, 1 )
-{
-    qDebug() << "RunGuard::RunGuard key" << key;
-}
-
-RunGuard &RunGuard::instance(const QString& key)
-{
-    static RunGuard s(key);
-    return s;
-}
-
-void RunGuard::activate()
-{
-    memLock.acquire();
-    {
-        QSharedMemory fix(sharedmemKey);    // Fix for *nix: http://habrahabr.ru/post/173281/
-        fix.attach();
-    }
-    memLock.release();
-}
-
-RunGuard::~RunGuard()
-{
-    release();
-}
-
-bool RunGuard::isAnotherRunning() const
-{
-    if ( sharedMem.isAttached() )
-        return false;
-
-    memLock.acquire();
-    const bool isRunning = sharedMem.attach();
-    if ( isRunning )
-        sharedMem.detach();
-    memLock.release();
-
-    return isRunning;
-}
-
-bool RunGuard::tryToRun()
-{
-    if ( isAnotherRunning() )   // Extra check
-        return false;
-
-    memLock.acquire();
-    const bool result = sharedMem.create( sizeof( quint64 ) );
-    memLock.release();
-    if ( !result )
-    {
-        release();
-        return false;
-    }
-
-    return true;
-}
-
-void RunGuard::release()
-{
-    memLock.acquire();
-    if ( sharedMem.isAttached() )
-        sharedMem.detach();
-    memLock.release();
-}
diff --git a/client/runguard.h b/client/runguard.h
deleted file mode 100644
index 96df44a8..00000000
--- a/client/runguard.h
+++ /dev/null
@@ -1,37 +0,0 @@
-#ifndef RUNGUARD_H
-#define RUNGUARD_H
-
-#include <QObject>
-#include <QSharedMemory>
-#include <QSystemSemaphore>
-#include <QDebug>
-
-/**
- * @brief The RunGuard class - The application single instance (via shared memory)
- */
-class RunGuard
-{
-
-public:
-    static RunGuard &instance(const QString& key = QString());
-
-    ~RunGuard();
-
-    void activate();
-    bool isAnotherRunning() const;
-    bool tryToRun();
-    void release();
-
-private:
-    RunGuard(const QString& key);
-    Q_DISABLE_COPY( RunGuard )
-
-    const QString key;
-    const QString memLockKey;
-    const QString sharedmemKey;
-
-    mutable QSharedMemory sharedMem;
-    mutable QSystemSemaphore memLock;
-
-};
-#endif // RUNGUARD_H