99 lines
4.5 KiB
C++
99 lines
4.5 KiB
C++
///////////////////////////////////////////////////////////////////////////////
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// MuldeR's Utilities for Qt
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// Copyright (C) 2004-2019 LoRd_MuldeR <MuldeR2@GMX.de>
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//
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// This library is free software; you can redistribute it and/or
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// modify it under the terms of the GNU Lesser General Public
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// License as published by the Free Software Foundation; either
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// version 2.1 of the License, or (at your option) any later version.
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//
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// This library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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// Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public
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// License along with this library; if not, write to the Free Software
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// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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//
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// http://www.gnu.org/licenses/lgpl-2.1.txt
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//////////////////////////////////////////////////////////////////////////////////
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/**
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* @file
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* @brief This file contains function for creating and managing job objects
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*
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* Each instance of MUtils::JobObject represents a job object. Call MUtils::JobObject::addProcessToJob() to add another sub-process to the job object. Call MUtils::JobObject::terminateJob() to terminate *all* sub-processes that currently belong to the job object at once.
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*
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* Note that all sub-processes that belong to the job object will be terminated when *this* process exits, gracefully or due to a crash. All sub-process belonging to a job object also are terminated when the corresponding MUtils::JobObject instance is destroyed.
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*/
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#pragma once
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#include <MUtils/Global.h>
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class QProcess;
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namespace MUtils
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{
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/**
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* @brief This class represents a job object
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*
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* Call addProcessToJob() to add another sub-process to this job object. Call terminateJob() to terminate all sub-processes that belong to this job object. Note that all sub-processes that belong to this job object will also be terminated when *this* process exits, gracefully or due to a crash.
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*
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* Also, when the JobObject instance is destroyed, all sub-process that belong to its corresponding job object and that are still running will be terminated!
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*/
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class MUTILS_API JobObject
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{
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public:
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/**
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* \brief Create a new JobObject instance
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*
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* Creating a new JobObject instance automatically creates a new job object on the system-level. Check isObjectCreated() to test whether the job object was successfully created or not.
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*/
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JobObject(void);
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/**
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* \brief Destroys the JobObject instance
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*
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* If the job object still has any running sub-processes left when the corresponding JobObject instance is destroyed, these sub-process are terminated!
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*/
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~JobObject(void);
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/**
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* \brief Test whether job object was created successfully
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*
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* The job object will be created automatically when a new JobObject instance is created. However, the constructor has **no** to tell whether the job object was created successfully on the system-level. Call this function to test whether the job object has been created.
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*
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* \return The function returns `true`, if and only if a job object was successfully created; otherwise it returns `false`.
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*/
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bool isObjectCreated(void);
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/**
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* \brief Add a process to the job object
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*
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* This function adds a another sub-process to the job object that is represented by this JobObject instance. Job object limitations apply to the sub-process a
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*
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* \param process A read-only pointer to the [QProcess](http://doc.qt.io/qt-4.8/qprocess.html) object that represents the sub-process to be added to the job object. The sub-process must be in the "running" state; otherwise the function will fail.
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*
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* \return The function returns `true`, if and only if the process was successfully added to the job object; otherwise it returns `false`.
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*/
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bool addProcessToJob(const QProcess *const process);
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/**
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* \brief Terminate all sub-processes of the job object
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*
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* This function immediately terminates *all* running sub-processes that belong to the job object represented by this JobObject instance at once.
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*
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* \param exitCode The exit code to be set for the sub-process when they are terminated.
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*
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* \return The function returns `true`, if the sub-processes were destroyed successfully, even if there were no running sub-process left; otherwise it returns `false`.
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*/
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bool terminateJob(const quint32 &exitCode);
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private:
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uintptr_t m_jobPtr;
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MUTILS_NO_COPY(JobObject)
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};
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}
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