python_interpreter_state.h

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/* * NRP Core - Backend infrastructure to synchronize simulations
 *
 * Copyright 2020-2023 NRP Team
 *
 * 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
 *
 * 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.
 *
 * This project has received funding from the European Union’s Horizon 2020
 * Framework Programme for Research and Innovation under the Specific Grant
 * Agreement No. 945539 (Human Brain Project SGA3).
 */
 
#ifndef PYTHON_INTERPRETER_STATE_H
#define PYTHON_INTERPRETER_STATE_H
 
#include "nrp_general_library/utils/wchar_t_converter.h"
 
#include <boost/python.hpp>
#include <stack>
 
class PythonInterpreterState
{
    public:
        PythonInterpreterState(int argc, const char *const *argv, bool allowThreads = false);
 
        PythonInterpreterState(int argc, const std::vector<const char*> &argv, bool allowThreads = false);
 
 
        explicit PythonInterpreterState(bool allowThreads = false);
 
        void allowThreads();
 
        bool threadsAllowed() const;
 
        void endAllowThreads();
 
        ~PythonInterpreterState();
 
    private:
        WCharTConverter _wcharArgs;
 
        PyThreadState *_state = nullptr;
};
 
class PythonGILLock
{
    public:
        PythonGILLock(PyGILState_STATE &state, const bool acquire = true);
 
        ~PythonGILLock();
 
        // Disable copy mechanism
        PythonGILLock(const PythonGILLock&)            = delete;
        PythonGILLock &operator=(const PythonGILLock&) = delete;
 
        void acquire();
 
        static bool hasGIL();
 
        void release();
 
    private:
        PyGILState_STATE *_state;
};
 
#endif // PYTHON_INTERPRETER_STATE_H