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#ifndef GREENLET_THREAD_STATE_DICT_CLEANUP_HPP
#define GREENLET_THREAD_STATE_DICT_CLEANUP_HPP
#include "greenlet_internal.hpp"
#include "greenlet_thread_state.hpp"
#ifdef __clang__
# pragma clang diagnostic push
# pragma clang diagnostic ignored "-Wmissing-field-initializers"
#endif
#ifndef G_THREAD_STATE_DICT_CLEANUP_TYPE
// shut the compiler up if it looks at this file in isolation
#define ThreadStateCreator int
#endif
// Define a Python object that goes in the Python thread state dict
// when the greenlet thread state is created, and which owns the
// reference to the greenlet thread local state.
// When the thread state dict is cleaned up, so too is the thread
// state. This works best if we make sure there are no circular
// references to the thread state.
typedef struct _PyGreenletCleanup {
PyObject_HEAD
ThreadStateCreator* thread_state_creator;
} PyGreenletCleanup;
static void
cleanup_do_dealloc(PyGreenletCleanup* self)
{
ThreadStateCreator* tmp = self->thread_state_creator;
self->thread_state_creator = nullptr;
if (tmp) {
delete tmp;
}
}
static void
cleanup_dealloc(PyGreenletCleanup* self)
{
PyObject_GC_UnTrack(self);
cleanup_do_dealloc(self);
}
static int
cleanup_clear(PyGreenletCleanup* self)
{
// This method is never called by our test cases.
cleanup_do_dealloc(self);
return 0;
}
static int
cleanup_traverse(PyGreenletCleanup* self, visitproc visit, void* arg)
{
if (self->thread_state_creator) {
return self->thread_state_creator->tp_traverse(visit, arg);
}
return 0;
}
static int
cleanup_is_gc(PyGreenlet* UNUSED(self))
{
return 1;
}
static PyTypeObject PyGreenletCleanup_Type = {
PyVarObject_HEAD_INIT(NULL, 0)
"greenlet._greenlet.ThreadStateCleanup",
sizeof(struct _PyGreenletCleanup),
0, /* tp_itemsize */
/* methods */
(destructor)cleanup_dealloc, /* tp_dealloc */
0, /* tp_print */
0, /* tp_getattr */
0, /* tp_setattr */
0, /* tp_compare */
0, /* tp_repr */
0, /* tp_as _number*/
0, /* tp_as _sequence*/
0, /* tp_as _mapping*/
0, /* tp_hash */
0, /* tp_call */
0, /* tp_str */
0, /* tp_getattro */
0, /* tp_setattro */
0, /* tp_as_buffer*/
G_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE, /* tp_flags */
"Internal use only", /* tp_doc */
(traverseproc)cleanup_traverse, /* tp_traverse */
(inquiry)cleanup_clear, /* tp_clear */
0, /* tp_richcompare */
// XXX: Don't our flags promise a weakref?
0, /* tp_weaklistoffset */
0, /* tp_iter */
0, /* tp_iternext */
0, /* tp_methods */
0, /* tp_members */
0, /* tp_getset */
0, /* tp_base */
0, /* tp_dict */
0, /* tp_descr_get */
0, /* tp_descr_set */
0, /* tp_dictoffset */
0, /* tp_init */
PyType_GenericAlloc, /* tp_alloc */
PyType_GenericNew, /* tp_new */
PyObject_GC_Del, /* tp_free */
(inquiry)cleanup_is_gc, /* tp_is_gc */
};
#ifdef __clang__
# pragma clang diagnostic pop
#endif
#endif
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