/******************************************************************************
* Copyright (c) 2012, Michael P. Gerlek (mpg@flaxen.com)
*
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following
* conditions are met:
*
*     * Redistributions of source code must retain the above copyright
*       notice, this list of conditions and the following disclaimer.
*     * Redistributions in binary form must reproduce the above copyright
*       notice, this list of conditions and the following disclaimer in
*       the documentation and/or other materials provided
*       with the distribution.
*     * Neither the name of Hobu, Inc. or Flaxen Consulting LLC nor the
*       names of its contributors may be used to endorse or promote
*       products derived from this software without specific prior
*       written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
* OF SUCH DAMAGE.
****************************************************************************/

#ifndef PDAL_PLANG_PYTHON_ENVIRONMENT_H
#define PDAL_PLANG_PYTHON_ENVIRONMENT_H

#include <pdal/pdal_internal.hpp>

#include <iostream>

// forward declare PyObject so we don't need the python headers everywhere
// see: http://mail.python.org/pipermail/python-dev/2003-August/037601.html
#ifndef PyObject_HEAD
struct _object;
typedef _object PyObject;
#endif

namespace pdal
{
namespace plang
{

class Redirector;


#ifdef PDAL_HAVE_PYTHON



std::string getPythonTraceback();

// there is one PythonEnvironment object per GlobalEnvironment object
class PDAL_DLL PythonEnvironment
{
public:
    PythonEnvironment();
    ~PythonEnvironment();

    // these just forward into the Redirector class
    void set_stdout(std::ostream* ostr);
    void reset_stdout();

    void gil_lock();
    void gil_unlock();

private:

    Redirector* m_redirector;

    // this is a casted PyGILState_STATE enum (we don't want to include <pystate.h> here)
    int m_gilstate; 
};


#else

typedef struct PythonEnvironmentHS *PythonEnvironment;

#endif

}
} // namespaces




#endif
