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/****************************************************************************
* *
* OpenNI 1.x Alpha *
* Copyright (C) 2011 PrimeSense Ltd. *
* *
* This file is part of OpenNI. *
* *
* OpenNI is free software: you can redistribute it and/or modify *
* it under the terms of the GNU Lesser General Public License as published *
* by the Free Software Foundation, either version 3 of the License, or *
* (at your option) any later version. *
* *
* OpenNI 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 Lesser General Public License for more details. *
* *
* You should have received a copy of the GNU Lesser General Public License *
* along with OpenNI. If not, see <http://www.gnu.org/licenses/>. *
* *
****************************************************************************/
#ifndef _XN_SCHEDULER_H_
#define _XN_SCHEDULER_H_
//---------------------------------------------------------------------------
// Includes
//---------------------------------------------------------------------------
#include <XnOS.h>
//---------------------------------------------------------------------------
// Defines
//---------------------------------------------------------------------------
#define XN_MASK_SCHEDULER "Scheduler"
//---------------------------------------------------------------------------
// Types
//---------------------------------------------------------------------------
struct XnScheduler; // forward declaration
typedef struct XnScheduler XnScheduler;
struct XnScheduledTask; // forward declaration
typedef struct XnScheduledTask XnScheduledTask;
typedef void (XN_CALLBACK_TYPE* XnTaskCallbackFuncPtr)(void* pCallbackArg);
//---------------------------------------------------------------------------
// Exported Function Declaration
//---------------------------------------------------------------------------
/**
* Starts a scheduler thread. Multiple timers can be added to the created scheduler.
*
* @param ppScheduler [out] Upon successful return, holds a handle to created scheduler.
*/
XN_C_API XnStatus XN_C_DECL xnSchedulerStart(XnScheduler** ppScheduler);
/**
* Shuts down a scheduler thread. All timers on that scheduler will be stopped.
*
* @param ppScheduler [in/out] A pointer to the scheduler to be shut down.
*/
XN_C_API XnStatus XN_C_DECL xnSchedulerShutdown(XnScheduler** ppScheduler);
/**
* Adds a task to the scheduler.
*
* @param pScheduler [in] The scheduler to handle this task.
* @param nInterval [in] The interval, in milliseconds, in which callback should be called.
* @param pCallback [in] The function to be called when time arrived.
* @param pCallbackArg [in] The argument that will be passed to the callback method.
* @param ppTask [out] Upon successful return, holds a handle to the started task.
*/
XN_C_API XnStatus XN_C_DECL xnSchedulerAddTask(XnScheduler* pScheduler, XnUInt64 nInterval, XnTaskCallbackFuncPtr pCallback, void* pCallbackArg, XnScheduledTask** ppTask);
/**
* Removes a task from the scheduler.
*
* @param pScheduler [in] The scheduler this task is registered to.
* @param ppTask [in/out] The task to be removed from the scheduler.
*/
XN_C_API XnStatus XN_C_DECL xnSchedulerRemoveTask(XnScheduler* pScheduler, XnScheduledTask** ppTask);
/**
* Changes scheduling of a specific task.
*
* @param pScheduler [in] The scheduler this task is registered to.
* @param pTask [in] The task to be removed from the scheduler.
* @param nInterval [in] The new interval to be used.
*/
XN_C_API XnStatus XN_C_DECL xnSchedulerRescheduleTask(XnScheduler* pScheduler, XnScheduledTask* pTask, XnUInt64 nInterval);
#endif //_XN_SCHEDULER_H_
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