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#ifndef CV2_UTIL_HPP
#define CV2_UTIL_HPP
#include "cv2.hpp"
#include "opencv2/core.hpp"
#include "opencv2/core/utils/tls.hpp"
#include <vector>
#include <string>
//======================================================================================================================
bool isPythonBindingsDebugEnabled();
void emit_failmsg(PyObject * exc, const char *msg);
int failmsg(const char *fmt, ...);
PyObject* failmsgp(const char *fmt, ...);
//======================================================================================================================
class PyAllowThreads
{
public:
PyAllowThreads() : _state(PyEval_SaveThread()) {}
~PyAllowThreads()
{
PyEval_RestoreThread(_state);
}
private:
PyThreadState* _state;
};
class PyEnsureGIL
{
public:
PyEnsureGIL() : _state(PyGILState_Ensure()) {}
~PyEnsureGIL()
{
PyGILState_Release(_state);
}
private:
PyGILState_STATE _state;
};
/**
* Light weight RAII wrapper for `PyObject*` owning references.
* In comparison to C++11 `std::unique_ptr` with custom deleter, it provides
* implicit conversion functions that might be useful to initialize it with
* Python functions those returns owning references through the `PyObject**`
* e.g. `PyErr_Fetch` or directly pass it to functions those want to borrow
* reference to object (doesn't extend object lifetime) e.g. `PyObject_Str`.
*/
class PySafeObject
{
public:
PySafeObject() : obj_(NULL) {}
explicit PySafeObject(PyObject* obj) : obj_(obj) {}
~PySafeObject()
{
Py_CLEAR(obj_);
}
operator PyObject*()
{
return obj_;
}
operator PyObject**()
{
return &obj_;
}
operator bool() {
return obj_ != nullptr;
}
PyObject* release()
{
PyObject* obj = obj_;
obj_ = NULL;
return obj;
}
private:
PyObject* obj_;
// Explicitly disable copy operations
PySafeObject(const PySafeObject*); // = delete
PySafeObject& operator=(const PySafeObject&); // = delete
};
//======================================================================================================================
extern PyObject* opencv_error;
void pyRaiseCVException(const cv::Exception &e);
#define ERRWRAP2(expr) \
try \
{ \
PyAllowThreads allowThreads; \
expr; \
} \
catch (const cv::Exception &e) \
{ \
pyRaiseCVException(e); \
return 0; \
} \
catch (const std::exception &e) \
{ \
PyErr_SetString(opencv_error, e.what()); \
return 0; \
} \
catch (...) \
{ \
PyErr_SetString(opencv_error, "Unknown C++ exception from OpenCV code"); \
return 0; \
}
//======================================================================================================================
extern cv::TLSData<std::vector<std::string> > conversionErrorsTLS;
inline void pyPrepareArgumentConversionErrorsStorage(std::size_t size)
{
std::vector<std::string>& conversionErrors = conversionErrorsTLS.getRef();
conversionErrors.clear();
conversionErrors.reserve(size);
}
void pyRaiseCVOverloadException(const std::string& functionName);
void pyPopulateArgumentConversionErrors();
//======================================================================================================================
PyObject *pycvRedirectError(PyObject*, PyObject *args, PyObject *kw);
#endif // CV2_UTIL_HPP
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