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/*
* Copyright 2011, Blender Foundation.
*
* 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.
*
* 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; if not, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
* Contributor:
* Jeroen Bakker
* Monique Dewanchand
*/
#ifndef _COM_WorkScheduler_h_
#define _COM_WorkScheduler_h_
#include "COM_ExecutionGroup.h"
extern "C" {
#include "BLI_threads.h"
}
#include "COM_WorkPackage.h"
#include "COM_defines.h"
#include "COM_Device.h"
// STATES
/** @brief states of the WorkScheduler
* @ingroup execution
*/
typedef enum WorkSchedulerState {
COM_WSS_UNKNOWN = -1,
COM_WSS_INITIALIZED = 0,
COM_WSS_STARTED = 1,
COM_WSS_STOPPING = 2,
COM_WSS_STOPPED = 3,
COM_WSS_DEINITIALIZED = 4
} WorkSchedulerState;
/** @brief the workscheduler
* @ingroup execution
*/
class WorkScheduler {
#if COM_CURRENT_THREADING_MODEL == COM_TM_QUEUE
/**
* @brief are we being stopped.
*/
static bool isStopping();
/**
* @brief main thread loop for cpudevices
* inside this loop new work is queried and being executed
*/
static void* thread_execute_cpu(void* data);
/**
* @brief main thread loop for gpudevices
* inside this loop new work is queried and being executed
*/
static void* thread_execute_gpu(void* data);
#endif
public:
/**
* @brief schedule a chunk of a group to be calculated.
* An execution group schedules a chunk in the WorkScheduler
* when ExecutionGroup.isOpenCL is set the work will be handled by a OpenCLDevice
* otherwide the work is scheduled for an CPUDevice
* @see ExecutionGroup.execute
* @param group the execution group
* @param chunkNumber the number of the chunk in the group to be executed
*/
static void schedule(ExecutionGroup* group, int chunkNumber);
/**
* @brief initialize the WorkScheduler
*
* during initialization the mutexes are initialized.
* there are two mutexes (for every device type one)
* After mutex initialization the system is queried in order to count the number of CPUDevices and GPUDevices to be created.
* For every hardware thread a CPUDevice and for every OpenCL GPU device a OpenCLDevice is created.
* these devices are stored in a separate list (cpudevices & gpudevices)
*/
static void initialize();
/**
* @brief deinitialize the WorkScheduler
* free all allocated resources
*/
static void deinitialize();
/**
* @brief Start the execution
* this methods will start the WorkScheduler. Inside this method all threads are initialized.
* for every device a thread is created.
* @see initialize Initialization and query of the number of devices
*/
static void start(CompositorContext &context);
/**
* @brief stop the execution
* All created thread by the start method are destroyed.
* @see start
*/
static void stop();
/**
* @brief wait for all work to be completed.
*/
static void finish();
/**
* @brief Are there OpenCL capable GPU devices initialized?
* the result of this method is stored in the CompositorContext
* A node can generate a different operation tree when OpenCLDevices exists.
* @see CompositorContext.getHasActiveOpenCLDevices
*/
static bool hasGPUDevices();
};
#endif
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