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/*
* Copyright (C) 2005-2018 Team Kodi
* This file is part of Kodi - https://kodi.tv
*
* SPDX-License-Identifier: GPL-2.0-or-later
* See LICENSES/README.md for more information.
*/
#include "CallbackHandler.h"
#include "LanguageHook.h"
namespace XBMCAddon
{
namespace Python
{
/**
* We are ASS-U-MEing that this construction is happening
* within the context of a Python call. This way we can
* store off the PyThreadState to later verify that we're
* handling callbacks in the appropriate thread.
*/
PythonCallbackHandler::PythonCallbackHandler()
{
XBMC_TRACE;
objectThreadState = PyThreadState_Get();
}
/**
* Now we are answering the question as to whether or not we are in the
* PyThreadState that we were in when we started.
*/
bool PythonCallbackHandler::isStateOk(AddonClass* obj)
{
XBMC_TRACE;
PyThreadState* state = PyThreadState_Get();
if (objectThreadState == state)
{
// make sure the interpreter is still active.
AddonClass::Ref<XBMCAddon::Python::PythonLanguageHook> lh(XBMCAddon::Python::PythonLanguageHook::GetIfExists(state->interp));
if (lh.isNotNull() && lh->HasRegisteredAddonClassInstance(obj) && lh.get() == obj->GetLanguageHook())
return true;
}
return false;
}
/**
* For this method we expect the PyThreadState to be passed as the user
* data for the check.
*
* @todo This is a stupid way to get this information back to the handler.
* there should be a more language neutral means.
*/
bool PythonCallbackHandler::shouldRemoveCallback(AddonClass* obj, void* threadState)
{
XBMC_TRACE;
if (threadState == objectThreadState)
return true;
// we also want to remove the callback if the language hook no longer exists.
// this is a belt-and-suspenders cleanup mechanism
return ! XBMCAddon::Python::PythonLanguageHook::IsAddonClassInstanceRegistered(obj);
}
}
}
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