How to supply a custom memory allocator or at the very least existing memory buffer to pybind for object instantiation.

[OmerUygurOzer]

Hi all,

Is there a way to have pybind use a custom memory allocator or at the very least use memory already allocated?

My particular use case is this I have a class called "Event". I bind this like the following:
pybind11::class_<Imperium::Core::Events::Event, Imperium::Core::Events::PyEvent, std::shared_ptr<Imperium::Core::Events::Event>>(m, "Event") .def(pybind11::init<>()) .def("GetEventType", &Imperium::Core::Events::Event::GetEventType, pybind11::return_value_policy::automatic)

Then on python side, I have a few classes that extend from this like:
class TestEvent(mymodule.Event): def __init__(self): imperium.Event.__init__(self); self.mTestString = "TestEvent String" def GetEventType(self): return 123;

These classes are instantiated on the python side as well and they then get passed to an EventManager class like:
GetEventManager().QueueEvent(TestEvent());

My goal is to make sure that the memory allocated to TestEvent is fully management by c++ despite it being created in python. And that whenever it's instantiated, it gets instantiated via some form of in place new operator / allocator supplied by me so that I have full control over where in the memory it is instantiated in.

Thanks in advance!