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|
/*****************************************************************
|
| Platinum - Task Manager
|
| Copyright (c) 2004-2010, Plutinosoft, LLC.
| All rights reserved.
| http://www.plutinosoft.com
|
| This program is free software; you can redistribute it and/or
| modify it under the terms of the GNU General Public License
| as published by the Free Software Foundation; either version 2
| of the License, or (at your option) any later version.
|
| OEMs, ISVs, VARs and other distributors that combine and
| distribute commercially licensed software with Platinum software
| and do not wish to distribute the source code for the commercially
| licensed software under version 2, or (at your option) any later
| version, of the GNU General Public License (the "GPL") must enter
| into a commercial license agreement with Plutinosoft, LLC.
| licensing@plutinosoft.com
|
| This program is distributed in the hope that it will be useful,
| but WITHOUT ANY WARRANTY; without even the implied warranty of
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
| GNU General Public License for more details.
|
| You should have received a copy of the GNU General Public License
| along with this program; see the file LICENSE.txt. If not, write to
| the Free Software Foundation, Inc.,
| 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
| http://www.gnu.org/licenses/gpl-2.0.html
|
****************************************************************/
/** @file
Runnable Tasks Manager
*/
#ifndef _PLT_TASKMANAGER_H_
#define _PLT_TASKMANAGER_H_
/*----------------------------------------------------------------------
| includes
+---------------------------------------------------------------------*/
#include "Neptune.h"
/*----------------------------------------------------------------------
| forward declarations
+---------------------------------------------------------------------*/
class PLT_ThreadTask;
/*----------------------------------------------------------------------
| PLT_TaskManager class
+---------------------------------------------------------------------*/
/**
The PLT_TaskManager class maintains a list of runnable tasks. During shutdown, it
can stop all running tasks. Additionally, it can limit the number of
tasks that can run at any given time.
*/
class PLT_TaskManager
{
public:
/**
Create a new Task Manager.
@param max_tasks Maximum number of concurrent tasks that the task manager
will allow. When the value is reached, a thread calling AddTask will block until
a task has finished.
*/
PLT_TaskManager(NPT_Cardinal max_tasks = 0);
virtual ~PLT_TaskManager();
/**
Start a new new task and associates it with this task manager.
@param task new task
@param delay optional time interval to wait before launching the new task
@param auto_destroy a flag to indicate if the task is owned by someone else
and thus should not destroy itself when done.
*/
virtual NPT_Result StartTask(PLT_ThreadTask* task,
NPT_TimeInterval* delay = NULL,
bool auto_destroy = true);
/**
Stop all tasks associated with this task manager.
*/
NPT_Result Abort();
/**
Reset task manager after an Abort so new tasks can be queued.
*/
NPT_Result Reset();
/**
Returns the max number of concurrent tasks allowed. 0 for no limit.
*/
NPT_Cardinal GetMaxTasks() { return m_MaxTasks; }
private:
friend class PLT_ThreadTask;
// called by PLT_ThreadTask
NPT_Result AddTask(PLT_ThreadTask* task);
NPT_Result RemoveTask(PLT_ThreadTask* task);
private:
NPT_List<PLT_ThreadTask*> m_Tasks;
NPT_Mutex m_TasksLock;
NPT_Queue<int>* m_Queue;
NPT_Cardinal m_MaxTasks;
NPT_Cardinal m_RunningTasks;
bool m_Stopping;
};
typedef NPT_Reference<PLT_TaskManager> PLT_TaskManagerReference;
#endif /* _PLT_TASKMANAGER_H_ */
|
