ReleaseGlobalInterpreterLock.cpp

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// Mantid Repository : https://github.com/mantidproject/mantid
//
// Copyright © 2018 ISIS Rutherford Appleton Laboratory UKRI,
//   NScD Oak Ridge National Laboratory, European Spallation Source,
//   Institut Laue - Langevin & CSNS, Institute of High Energy Physics, CAS
// SPDX - License - Identifier: GPL - 3.0 +
#include "MantidPythonInterface/core/ReleaseGlobalInterpreterLock.h"
 
namespace Mantid::PythonInterface {
 
ReleaseGlobalInterpreterLock::ReleaseGlobalInterpreterLock()
    : m_tracefunc(nullptr), m_tracearg(nullptr), m_saved(nullptr) {
  PyThreadState *curThreadState = PyThreadState_GET();
  m_tracefunc = curThreadState->c_tracefunc;
  m_tracearg = curThreadState->c_traceobj;
  Py_XINCREF(m_tracearg);
  PyEval_SetTrace(nullptr, nullptr);
  m_saved = PyEval_SaveThread();
}
 
ReleaseGlobalInterpreterLock::~ReleaseGlobalInterpreterLock() {
  PyEval_RestoreThread(m_saved);
  PyEval_SetTrace(m_tracefunc, m_tracearg);
  Py_XDECREF(m_tracearg);
}
 
} // namespace Mantid::PythonInterface