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/*
* SPDX-FileCopyrightText: All Contributors to the PyTango project
*
* SPDX-License-Identifier: LGPL-3.0-or-later
*/
#pragma once
#include <map>
#include "common_header.h"
#include "convertors/type_casters.h"
struct weakref_cmp {
bool operator()(const py::weakref &lhs, const py::weakref &rhs) const {
auto lhandle = lhs(); // Use the call operator to attempt to get a live reference
auto rhandle = rhs(); // Same for rhs
return lhandle.ptr() < rhandle.ptr(); // Compare the underlying PyObject* if still alive
}
};
/// Tango expects an object for callbacks derived from Tango::CallBack.
/// For read_attribute_asynch, write_attribute_asynch, the callback object
/// should be available until the callback is run. Then it can disappear.
/// Also if we forget about a DeviceProxy we don't need the callback anymore.
/// For event subscription however, the requirements are different. The C++
/// callback can be called way after the original DeviceProxy has disappered.
/// So for this case, the callback should live forever. As we don't want it,
/// we implemented the deletion of the callback in the DeviceProxy destructor
/// itself, after performing an unsubscribe.
/// @todo this is for cmd_ended, attr_read and attr_written. push_event are not done!
class PyCallBackAutoDie : public Tango::CallBack {
public:
PyCallBackAutoDie(std::int64_t id) :
my_id(id) { }
~PyCallBackAutoDie() override = default;
PyTango::ExtractAs _extract_as = PyTango::ExtractAsNumpy;
void set_extract_as(PyTango::ExtractAs extract_as) {
this->_extract_as = extract_as;
}
std::int64_t my_id;
void delete_me();
void cmd_ended(Tango::CmdDoneEvent *ev) override;
void attr_read(Tango::AttrReadEvent *ev) override;
void attr_written(Tango::AttrWrittenEvent *ev) override;
void push_event([[maybe_unused]] Tango::EventData *ev) override { }
void push_event([[maybe_unused]] Tango::AttrConfEventData *ev) override { }
void push_event([[maybe_unused]] Tango::DataReadyEventData *ev) override { }
void push_event([[maybe_unused]] Tango::PipeEventData *ev) override { }
void push_event([[maybe_unused]] Tango::DevIntrChangeEventData *ev) override { }
};
class PyEventCallBack : public Tango::CallBack {
public:
PyEventCallBack() { }
~PyEventCallBack() override = default;
PyTango::ExtractAs _extract_as = PyTango::ExtractAsNumpy;
void set_extract_as(PyTango::ExtractAs extract_as) {
this->_extract_as = extract_as;
}
void cmd_ended([[maybe_unused]] Tango::CmdDoneEvent *ev) override { }
void attr_read([[maybe_unused]] Tango::AttrReadEvent *ev) override { }
void attr_written([[maybe_unused]] Tango::AttrWrittenEvent *ev) override { }
void push_event(Tango::EventData *ev) override;
void push_event(Tango::AttrConfEventData *ev) override;
void push_event(Tango::DataReadyEventData *ev) override;
void push_event([[maybe_unused]] Tango::PipeEventData *ev) override { }
void push_event(Tango::DevIntrChangeEventData *ev) override;
static void fill_py_event(Tango::EventData *ev,
py::object &py_ev,
PyTango::ExtractAs extract_as);
static void fill_py_event(Tango::AttrConfEventData *ev,
py::object &py_ev,
PyTango::ExtractAs extract_as);
static void fill_py_event(Tango::DataReadyEventData *ev,
py::object &py_ev,
PyTango::ExtractAs extract_as);
static void fill_py_event(Tango::DevIntrChangeEventData *ev,
py::object &py_ev,
PyTango::ExtractAs extract_as);
};
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