hyperion.ng/libsrc/python/PythonProgram.cpp
LordGrey efc2046ab5
Various Cleanups (#1075)
* LedDevice - Address clang findings

* Fix Windows Warnings

* Ensure newInput is initialised

* Clean-up unused elements for Plaform Capture

* Fix initialization problem and spellings

* Address clang findings and spelling corrections

* LedDevice clean-ups

* Cleanups

* Align that getLedCount is int

* Have "display" as default for Grabbers

* Fix config during start-up for missing elements

* Framegrabber Clean-up - Remove non supported grabbers from selection, filter valid options

* Typo

* Framegrabber.json - Fix property numbering

* Preselect active Grabbertype

* Sort Grabbernames

* Align options with selected element

* Fix deletion of pointer to incomplete type 'BonjourBrowserWrapper'

* Address macOS compile warnings

* Have default layout = 1 LED only to avoid errors as in #673

* Address lgtm findings

* Address finding that params passed to LedDevice discovery were not considered

* Cleanups after merging with latest master

* Update Changelog

* Address lgtm findings

* Fix comment

* Test Fix

* Fix Python Warning

* Handle Dummy Device assignment correctly

* Address delete called on non-final 'commandline::Option' that has virtual functions but non-virtual destructor

* Correct that QTimer.start accepts only int

* Have Release Python GIL & reset threat state chnage downward compatible

* Correct format specifier

* LedDevice - add assertions

* Readonly DB - Fix merge issue

* Smoothing - Fix wrong defaults

* LedDevice - correct assertion

* Show smoothing config set# in debug and related values.

* Suppress error on windows, if default file is "/dev/null"

* CMAKE - Allow to define QT_BASE_DIR dynamically via environment-variable

* Ignore Visual Studio specific files

Co-authored-by: Paulchen Panther <16664240+Paulchen-Panther@users.noreply.github.com>
2020-11-14 17:58:56 +01:00

174 lines
5.1 KiB
C++

#include <python/PythonProgram.h>
#include <python/PythonUtils.h>
#include <utils/Logger.h>
#include <QThread>
PyThreadState* mainThreadState;
PythonProgram::PythonProgram(const QString & name, Logger * log) :
_name(name), _log(log), _tstate(nullptr)
{
// we probably need to wait until mainThreadState is available
while(mainThreadState == nullptr){};
// get global lock
PyEval_RestoreThread(mainThreadState);
// Initialize a new thread state
_tstate = Py_NewInterpreter();
if(_tstate == nullptr)
{
#if (PY_VERSION_HEX >= 0x03020000)
PyThreadState_Swap(mainThreadState);
PyEval_SaveThread();
#else
PyEval_ReleaseLock();
#endif
Error(_log, "Failed to get thread state for %s",QSTRING_CSTR(_name));
return;
}
PyThreadState_Swap(_tstate);
}
PythonProgram::~PythonProgram()
{
if (!_tstate)
return;
// stop sub threads if needed
for (PyThreadState* s = PyInterpreterState_ThreadHead(_tstate->interp), *old = nullptr; s;)
{
if (s == _tstate)
{
s = s->next;
continue;
}
if (old != s)
{
Debug(_log,"ID %s: Waiting on thread %u", QSTRING_CSTR(_name), s->thread_id);
old = s;
}
Py_BEGIN_ALLOW_THREADS;
QThread::msleep(100);
Py_END_ALLOW_THREADS;
s = PyInterpreterState_ThreadHead(_tstate->interp);
}
// Clean up the thread state
Py_EndInterpreter(_tstate);
#if (PY_VERSION_HEX >= 0x03020000)
PyThreadState_Swap(mainThreadState);
PyEval_SaveThread();
#else
PyEval_ReleaseLock();
#endif
}
void PythonProgram::execute(const QByteArray & python_code)
{
if (!_tstate)
return;
PyObject *main_module = PyImport_ImportModule("__main__"); // New Reference
PyObject *main_dict = PyModule_GetDict(main_module); // Borrowed reference
Py_INCREF(main_dict); // Incref "main_dict" to use it in PyRun_String(), because PyModule_GetDict() has decref "main_dict"
Py_DECREF(main_module); // // release "main_module" when done
PyObject *result = PyRun_String(python_code.constData(), Py_file_input, main_dict, main_dict); // New Reference
if (!result)
{
if (PyErr_Occurred()) // Nothing needs to be done for a borrowed reference
{
Error(_log,"###### PYTHON EXCEPTION ######");
Error(_log,"## In effect '%s'", QSTRING_CSTR(_name));
/* Objects all initialized to NULL for Py_XDECREF */
PyObject *errorType = NULL, *errorValue = NULL, *errorTraceback = NULL;
PyErr_Fetch(&errorType, &errorValue, &errorTraceback); // New Reference or NULL
PyErr_NormalizeException(&errorType, &errorValue, &errorTraceback);
// Extract exception message from "errorValue"
if(errorValue)
{
QString message;
if(PyObject_HasAttrString(errorValue, "__class__"))
{
PyObject *classPtr = PyObject_GetAttrString(errorValue, "__class__"); // New Reference
PyObject *class_name = NULL; /* Object "class_name" initialized to NULL for Py_XDECREF */
class_name = PyObject_GetAttrString(classPtr, "__name__"); // New Reference or NULL
if(class_name && PyUnicode_Check(class_name))
message.append(PyUnicode_AsUTF8(class_name));
Py_DECREF(classPtr); // release "classPtr" when done
Py_XDECREF(class_name); // Use Py_XDECREF() to ignore NULL references
}
// Object "class_name" initialized to NULL for Py_XDECREF
PyObject *valueString = NULL;
valueString = PyObject_Str(errorValue); // New Reference or NULL
if(valueString && PyUnicode_Check(valueString))
{
if(!message.isEmpty())
message.append(": ");
message.append(PyUnicode_AsUTF8(valueString));
}
Py_XDECREF(valueString); // Use Py_XDECREF() to ignore NULL references
Error(_log, "## %s", QSTRING_CSTR(message));
}
// Extract exception message from "errorTraceback"
if(errorTraceback)
{
// Object "tracebackList" initialized to NULL for Py_XDECREF
PyObject *tracebackModule = NULL, *methodName = NULL, *tracebackList = NULL;
QString tracebackMsg;
tracebackModule = PyImport_ImportModule("traceback"); // New Reference or NULL
methodName = PyUnicode_FromString("format_exception"); // New Reference or NULL
tracebackList = PyObject_CallMethodObjArgs(tracebackModule, methodName, errorType, errorValue, errorTraceback, NULL); // New Reference or NULL
if(tracebackList)
{
PyObject* iterator = PyObject_GetIter(tracebackList); // New Reference
PyObject* item;
while( (item = PyIter_Next(iterator)) ) // New Reference
{
Error(_log, "## %s",QSTRING_CSTR(QString(PyUnicode_AsUTF8(item)).trimmed()));
Py_DECREF(item); // release "item" when done
}
Py_DECREF(iterator); // release "iterator" when done
}
// Use Py_XDECREF() to ignore NULL references
Py_XDECREF(tracebackModule);
Py_XDECREF(methodName);
Py_XDECREF(tracebackList);
// Give the exception back to python and print it to stderr in case anyone else wants it.
Py_XINCREF(errorType);
Py_XINCREF(errorValue);
Py_XINCREF(errorTraceback);
PyErr_Restore(errorType, errorValue, errorTraceback);
//PyErr_PrintEx(0); // Remove this line to switch off stderr output
}
Error(_log,"###### EXCEPTION END ######");
}
}
else
{
Py_DECREF(result); // release "result" when done
}
Py_DECREF(main_dict); // release "main_dict" when done
}