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/*=========================================================================
Program: Visualization Toolkit
Module: vtkSMPTools.cxx
Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
All rights reserved.
See Copyright.txt or http://www.kitware.com/Copyright.htm for details.
This software is distributed WITHOUT ANY WARRANTY; without even
the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
PURPOSE. See the above copyright notice for more information.
=========================================================================*/
#include "vtkSMPTools.h"
#include "vtkObjectFactory.h"
#include <pthread.h>
static bool vtkSMPToolsInitialized = false;
static int vtkSMPToolsNumberOfThreads = 0;
static std::vector<vtkMultiThreaderIDType> vtkSMPToolsThreadIds;
//static pthread_barrier_t barr;
VTKCOMMONCORE_EXPORT void vtkSMPToolsInitialize()
{
vtkSMPTools::Initialize();
}
VTKCOMMONCORE_EXPORT int vtkSMPToolsGetNumberOfThreads()
{
vtkSMPTools::Initialize();
return vtkSMPToolsNumberOfThreads;
}
VTKCOMMONCORE_EXPORT int vtkSMPToolsGetThreadID()
{
vtkSMPTools::Initialize();
vtkMultiThreaderIDType rawID = vtkMultiThreader::GetCurrentThreadID();
size_t numIDs = vtkSMPToolsThreadIds.size();
for (size_t i=0; i<numIDs; i++)
{
if (vtkSMPToolsThreadIds[i] == rawID)
{
return i;
}
}
return -1;
}
VTKCOMMONCORE_EXPORT std::vector<vtkMultiThreaderIDType>& vtkSMPToolsGetThreadIds()
{
return vtkSMPToolsThreadIds;
}
//--------------------------------------------------------------------------------
void vtkSMPTools::Initialize(int nThreads)
{
if (vtkSMPToolsInitialized)
{
return;
}
if (nThreads == 0)
{
vtkSMPToolsNumberOfThreads =
vtkMultiThreader::GetGlobalDefaultNumberOfThreads();
}
else
{
vtkSMPToolsNumberOfThreads = nThreads;
}
vtkSMPToolsInitialized = true;
vtkSMPToolsThreadIds.resize(vtkSMPToolsNumberOfThreads);
vtkSMPToolsThreadIds[0] = vtkMultiThreader::GetCurrentThreadID();
}
int vtkSMPTools::GetEstimatedNumberOfThreads()
{
return vtkSMPToolsNumberOfThreads;
}
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