131 lines
4.6 KiB
C++
131 lines
4.6 KiB
C++
// The MIT License (MIT)
|
|
//
|
|
// Copyright (c) Itay Grudev 2015 - 2018
|
|
//
|
|
// Permission is hereby granted, free of charge, to any person obtaining a copy
|
|
// of this software and associated documentation files (the "Software"), to deal
|
|
// in the Software without restriction, including without limitation the rights
|
|
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
|
// copies of the Software, and to permit persons to whom the Software is
|
|
// furnished to do so, subject to the following conditions:
|
|
//
|
|
// The above copyright notice and this permission notice shall be included in
|
|
// all copies or substantial portions of the Software.
|
|
//
|
|
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
|
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
|
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
|
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
|
// THE SOFTWARE.
|
|
|
|
#ifndef SINGLECOREAPPLICATION_H
|
|
#define SINGLECOREAPPLICATION_H
|
|
|
|
#include <QtCore/QtGlobal>
|
|
#include <QCoreApplication>
|
|
#include <QtNetwork/QLocalSocket>
|
|
|
|
class SingleCoreApplicationPrivate;
|
|
|
|
/**
|
|
* @brief The SingleCoreApplication class handles multipe instances of the same
|
|
* Application
|
|
* @see QCoreApplication
|
|
*/
|
|
class SingleCoreApplication : public QCoreApplication
|
|
{
|
|
Q_OBJECT
|
|
|
|
typedef QCoreApplication app_t;
|
|
|
|
public:
|
|
/**
|
|
* @brief Mode of operation of SingleCoreApplication.
|
|
* Whether the block should be user-wide or system-wide and whether the
|
|
* primary instance should be notified when a secondary instance had been
|
|
* started.
|
|
* @note Operating system can restrict the shared memory blocks to the same
|
|
* user, in which case the User/System modes will have no effect and the
|
|
* block will be user wide.
|
|
* @enum
|
|
*/
|
|
enum Mode {
|
|
User = 1 << 0,
|
|
System = 1 << 1,
|
|
SecondaryNotification = 1 << 2,
|
|
ExcludeAppVersion = 1 << 3,
|
|
ExcludeAppPath = 1 << 4
|
|
};
|
|
Q_DECLARE_FLAGS(Options, Mode)
|
|
|
|
/**
|
|
* @brief Intitializes a SingleCoreApplication instance with argc command line
|
|
* arguments in argv
|
|
* @arg {int &} argc - Number of arguments in argv
|
|
* @arg {const char *[]} argv - Supplied command line arguments
|
|
* @arg {bool} allowSecondary - Whether to start the instance as secondary
|
|
* if there is already a primary instance.
|
|
* @arg {Mode} mode - Whether for the SingleCoreApplication block to be applied
|
|
* User wide or System wide.
|
|
* @arg {int} timeout - Timeout to wait in miliseconds.
|
|
* @note argc and argv may be changed as Qt removes arguments that it
|
|
* recognizes
|
|
* @note Mode::SecondaryNotification only works if set on both the primary
|
|
* instance and the secondary instance.
|
|
* @note The timeout is just a hint for the maximum time of blocking
|
|
* operations. It does not guarantee that the SingleCoreApplication
|
|
* initialisation will be completed in given time, though is a good hint.
|
|
* Usually 4*timeout would be the worst case (fail) scenario.
|
|
* @see See the corresponding QAPPLICATION_CLASS constructor for reference
|
|
*/
|
|
explicit SingleCoreApplication( int &argc, char *argv[], bool allowSecondary = false, Options options = Mode::User, int timeout = 1000 );
|
|
~SingleCoreApplication();
|
|
|
|
/**
|
|
* @brief Returns if the instance is the primary instance
|
|
* @returns {bool}
|
|
*/
|
|
bool isPrimary();
|
|
|
|
/**
|
|
* @brief Returns if the instance is a secondary instance
|
|
* @returns {bool}
|
|
*/
|
|
bool isSecondary();
|
|
|
|
/**
|
|
* @brief Returns a unique identifier for the current instance
|
|
* @returns {qint32}
|
|
*/
|
|
quint32 instanceId();
|
|
|
|
/**
|
|
* @brief Returns the process ID (PID) of the primary instance
|
|
* @returns {qint64}
|
|
*/
|
|
qint64 primaryPid();
|
|
|
|
/**
|
|
* @brief Sends a message to the primary instance. Returns true on success.
|
|
* @param {int} timeout - Timeout for connecting
|
|
* @returns {bool}
|
|
* @note sendMessage() will return false if invoked from the primary
|
|
* instance.
|
|
*/
|
|
bool sendMessage( QByteArray message, int timeout = 100 );
|
|
|
|
Q_SIGNALS:
|
|
void instanceStarted();
|
|
void receivedMessage( quint32 instanceId, QByteArray message );
|
|
|
|
private:
|
|
SingleCoreApplicationPrivate *d_ptr;
|
|
Q_DECLARE_PRIVATE(SingleCoreApplication)
|
|
};
|
|
|
|
Q_DECLARE_OPERATORS_FOR_FLAGS(SingleCoreApplication::Options)
|
|
|
|
#endif // SINGLECOREAPPLICATION_H
|