gil_releaser.h

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/* Author: Bjarne von Horn */
 
#pragma once
 
#include <utility>
#include <Python.h>
 
namespace moveit
{
namespace py_bindings_tools
{
class GILReleaser
{
  PyThreadState* m_thread_state;
 
public:
  GILReleaser() noexcept
  {
    m_thread_state = PyEval_SaveThread();
  }
  ~GILReleaser() noexcept
  {
    if (m_thread_state)
    {
      PyEval_RestoreThread(m_thread_state);
      m_thread_state = nullptr;
    }
  }
 
  GILReleaser(const GILReleaser&) = delete;
  GILReleaser(GILReleaser&& other) noexcept
  {
    m_thread_state = other.m_thread_state;
    other.m_thread_state = nullptr;
  }
 
  GILReleaser& operator=(const GILReleaser&) = delete;
  GILReleaser& operator=(GILReleaser&& other) noexcept
  {
    GILReleaser copy(std::move(other));
    this->swap(copy);
    return *this;
  }
 
  void swap(GILReleaser& other) noexcept
  {
    std::swap(other.m_thread_state, m_thread_state);
  }
};
 
}  // namespace py_bindings_tools
}  // namespace moveit