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/*=========================================================================
Program: Visualization Toolkit
Module: vtkSMPThreadPool.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 "SMP/STDThread/vtkSMPThreadPool.h"
#include <iostream>
namespace vtk
{
namespace detail
{
namespace smp
{
VTK_ABI_NAMESPACE_BEGIN
vtkSMPThreadPool::vtkSMPThreadPool(int threadNumber)
{
this->Threads.reserve(threadNumber);
for (int i = 0; i < threadNumber; ++i)
{
this->Threads.emplace_back(std::bind(&vtkSMPThreadPool::ThreadJob, this));
}
}
void vtkSMPThreadPool::Join()
{
{
std::unique_lock<std::mutex> lock(this->Mutex);
this->Joining = true;
this->ConditionVariable.notify_all();
}
for (auto& it : this->Threads)
{
it.join();
}
}
void vtkSMPThreadPool::DoJob(std::function<void(void)> job)
{
std::unique_lock<std::mutex> lock(this->Mutex);
this->JobQueue.emplace(std::move(job));
this->ConditionVariable.notify_one();
}
void vtkSMPThreadPool::ThreadJob()
{
std::function<void(void)> job;
while (true)
{
{
std::unique_lock<std::mutex> lock(this->Mutex);
this->ConditionVariable.wait(
lock, [this] { return (!this->JobQueue.empty() || this->Joining); });
if (this->JobQueue.empty())
{
return;
}
job = std::move(this->JobQueue.front());
this->JobQueue.pop();
}
job();
}
}
std::vector<std::thread>* vtk::detail::smp::vtkSMPThreadPool::GetThreads()
{
return &(this->Threads);
}
VTK_ABI_NAMESPACE_END
} // namespace smp
} // namespace detail
} // namespace vtk
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