itkGPUContextManager.h

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/*=========================================================================
 *
 *  Copyright NumFOCUS
 *
 *  Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *         https://www.apache.org/licenses/LICENSE-2.0.txt
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 *
 *=========================================================================*/
#ifndef itkGPUContextManager_h
#define itkGPUContextManager_h
 
#include "itkOpenCLUtil.h"
#include "itkLightObject.h"
 
namespace itk
{
class GPUContextManager : public LightObject
{
public:
  static GPUContextManager *
  GetInstance();
 
  void
  DestroyInstance();
 
  cl_command_queue
  GetCommandQueue(int i);
 
  unsigned int
  GetNumberOfCommandQueues() const
  {
    return m_NumberOfDevices;
  }
 
  cl_context
  GetCurrentContext()
  {
    return m_Context;
  }
 
  cl_device_id
  GetDeviceId(int i);
 
private:
  GPUContextManager();
  ~GPUContextManager() override;
 
  cl_platform_id     m_Platform{};
  cl_context         m_Context{};
  cl_device_id *     m_Devices{};
  cl_command_queue * m_CommandQueue{}; // one queue per device
 
  cl_uint m_NumberOfDevices, m_NumberOfPlatforms{};
 
  static GPUContextManager * m_Instance;
};
} // namespace itk
 
#endif