/*=========================================================================
 *
 *  Copyright UMC Utrecht and contributors
 *
 *  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
 *
 *        http://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.
 *
 *=========================================================================*/
#include "itkOpenCLEvent.h"
#include "itkOpenCLContext.h"
#include "itkOpenCLMacro.h"

namespace itk
{
OpenCLEvent::OpenCLEvent()
  : m_Id(0)
{}

//------------------------------------------------------------------------------
OpenCLEvent::OpenCLEvent(const cl_event id)
  : m_Id(id)
{}

//------------------------------------------------------------------------------
OpenCLEvent::OpenCLEvent(const OpenCLEvent & other)
  : m_Id(other.m_Id)
{
  if (!this->IsNull())
  {
    clRetainEvent(this->m_Id);
  }
}


//------------------------------------------------------------------------------
OpenCLEvent::~OpenCLEvent()
{
  if (!this->IsNull())
  {
    clReleaseEvent(this->m_Id);
  }
}


//------------------------------------------------------------------------------
inline OpenCLEvent &
OpenCLEvent::operator=(const OpenCLEvent & other)
{
  if (other.m_Id)
  {
    clRetainEvent(other.m_Id);
  }
  if (this->m_Id)
  {
    clReleaseEvent(this->m_Id);
  }
  this->m_Id = other.m_Id;
  return *this;
}


//------------------------------------------------------------------------------
cl_int
OpenCLEvent::GetStatus() const
{
  if (this->IsNull())
  {
    return CL_INVALID_EVENT;
  }

  cl_int st, error = clGetEventInfo(m_Id, CL_EVENT_COMMAND_EXECUTION_STATUS, sizeof(st), &st, 0);
  if (error != CL_SUCCESS)
  {
    return error;
  }
  else
  {
    return st;
  }
}


//------------------------------------------------------------------------------
cl_command_type
OpenCLEvent::GetCommandType() const
{
  if (this->IsNull())
  {
    return 0;
  }

  cl_command_type type;
  cl_int          error = clGetEventInfo(this->m_Id, CL_EVENT_COMMAND_TYPE, sizeof(type), &type, 0);
  if (error != CL_SUCCESS)
  {
    return 0;
  }
  else
  {
    return type;
  }
}


//------------------------------------------------------------------------------
cl_int
OpenCLEvent::WaitForFinished()
{
  if (this->IsNull())
  {
    return 0;
  }

  const cl_int error = clWaitForEvents(1, &this->m_Id);
  if (error != CL_SUCCESS)
  {
    itkOpenCLErrorMacroGeneric(<< "OpenCLEvent::WaitForFinished:" << OpenCLContext::GetErrorName(error));
  }
  return error;
}


//------------------------------------------------------------------------------
cl_int
OpenCLEvent::SetCallback(cl_int type, void(CL_CALLBACK * pfn_notify)(cl_event, cl_int, void *), void * user_data)
{
  if (this->IsNull())
  {
    return 0;
  }

  const cl_int error = clSetEventCallback(m_Id, type, pfn_notify, user_data);
  if (error != CL_SUCCESS)
  {
    itkOpenCLErrorMacroGeneric(<< "OpenCLEvent::SetCallback:" << OpenCLContext::GetErrorName(error));
  }
  return error;
}


//------------------------------------------------------------------------------
cl_ulong
OpenCLEvent::GetQueueTime() const
{
  if (this->IsNull())
  {
    return 0;
  }

  cl_ulong time;
  if (clGetEventProfilingInfo(this->m_Id, CL_PROFILING_COMMAND_QUEUED, sizeof(time), &time, 0) != CL_SUCCESS)
  {
    return 0;
  }
  return time;
}


//------------------------------------------------------------------------------
cl_ulong
OpenCLEvent::GetSubmitTime() const
{
  if (this->IsNull())
  {
    return 0;
  }

  cl_ulong time;
  if (clGetEventProfilingInfo(this->m_Id, CL_PROFILING_COMMAND_SUBMIT, sizeof(time), &time, 0) != CL_SUCCESS)
  {
    return 0;
  }
  return time;
}


//------------------------------------------------------------------------------
cl_ulong
OpenCLEvent::GetRunTime() const
{
  if (this->IsNull())
  {
    return 0;
  }

  cl_ulong time;
  if (clGetEventProfilingInfo(this->m_Id, CL_PROFILING_COMMAND_START, sizeof(time), &time, 0) != CL_SUCCESS)
  {
    return 0;
  }
  return time;
}


//------------------------------------------------------------------------------
cl_ulong
OpenCLEvent::GetFinishTime() const
{
  if (this->IsNull())
  {
    return 0;
  }

  cl_ulong time;
  if (clGetEventProfilingInfo(this->m_Id, CL_PROFILING_COMMAND_END, sizeof(time), &time, 0) != CL_SUCCESS)
  {
    return 0;
  }
  return time;
}


//------------------------------------------------------------------------------
//! Operator ==
bool
operator==(const OpenCLEvent & lhs, const OpenCLEvent & rhs)
{
  if (&rhs == &lhs)
  {
    return true;
  }
  return lhs.GetEventId() == rhs.GetEventId();
}


//------------------------------------------------------------------------------
//! Operator !=
bool
operator!=(const OpenCLEvent & lhs, const OpenCLEvent & rhs)
{
  return !(lhs == rhs);
}


} // namespace itk
