cpython/Objects/interpreteridobject.c
Victor Stinner 32c5a17444
bpo-43962: Fix _PyInterpreterState_IDIncref() (GH-25683)
_PyInterpreterState_IDIncref() now calls
_PyInterpreterState_IDInitref() and always increments id_refcount.
2021-04-28 13:40:44 +02:00

295 lines
8.7 KiB
C

/* InterpreterID object */
#include "Python.h"
#include "pycore_abstract.h" // _PyIndex_Check()
#include "pycore_interp.h" // _PyInterpreterState_LookUpID()
#include "interpreteridobject.h"
typedef struct interpid {
PyObject_HEAD
int64_t id;
} interpid;
static interpid *
newinterpid(PyTypeObject *cls, int64_t id, int force)
{
PyInterpreterState *interp = _PyInterpreterState_LookUpID(id);
if (interp == NULL) {
if (force) {
PyErr_Clear();
}
else {
return NULL;
}
}
if (interp != NULL) {
if (_PyInterpreterState_IDIncref(interp) < 0) {
return NULL;
}
}
interpid *self = PyObject_New(interpid, cls);
if (self == NULL) {
if (interp != NULL) {
_PyInterpreterState_IDDecref(interp);
}
return NULL;
}
self->id = id;
return self;
}
static int
interp_id_converter(PyObject *arg, void *ptr)
{
int64_t id;
if (PyObject_TypeCheck(arg, &_PyInterpreterID_Type)) {
id = ((interpid *)arg)->id;
}
else if (_PyIndex_Check(arg)) {
id = PyLong_AsLongLong(arg);
if (id == -1 && PyErr_Occurred()) {
return 0;
}
if (id < 0) {
PyErr_Format(PyExc_ValueError,
"interpreter ID must be a non-negative int, got %R", arg);
return 0;
}
}
else {
PyErr_Format(PyExc_TypeError,
"interpreter ID must be an int, got %.100s",
Py_TYPE(arg)->tp_name);
return 0;
}
*(int64_t *)ptr = id;
return 1;
}
static PyObject *
interpid_new(PyTypeObject *cls, PyObject *args, PyObject *kwds)
{
static char *kwlist[] = {"id", "force", NULL};
int64_t id;
int force = 0;
if (!PyArg_ParseTupleAndKeywords(args, kwds,
"O&|$p:InterpreterID.__init__", kwlist,
interp_id_converter, &id, &force)) {
return NULL;
}
return (PyObject *)newinterpid(cls, id, force);
}
static void
interpid_dealloc(PyObject *v)
{
int64_t id = ((interpid *)v)->id;
PyInterpreterState *interp = _PyInterpreterState_LookUpID(id);
if (interp != NULL) {
_PyInterpreterState_IDDecref(interp);
}
else {
// already deleted
PyErr_Clear();
}
Py_TYPE(v)->tp_free(v);
}
static PyObject *
interpid_repr(PyObject *self)
{
PyTypeObject *type = Py_TYPE(self);
const char *name = _PyType_Name(type);
interpid *id = (interpid *)self;
return PyUnicode_FromFormat("%s(%" PRId64 ")", name, id->id);
}
static PyObject *
interpid_str(PyObject *self)
{
interpid *id = (interpid *)self;
return PyUnicode_FromFormat("%" PRId64 "", id->id);
}
static PyObject *
interpid_int(PyObject *self)
{
interpid *id = (interpid *)self;
return PyLong_FromLongLong(id->id);
}
static PyNumberMethods interpid_as_number = {
0, /* nb_add */
0, /* nb_subtract */
0, /* nb_multiply */
0, /* nb_remainder */
0, /* nb_divmod */
0, /* nb_power */
0, /* nb_negative */
0, /* nb_positive */
0, /* nb_absolute */
0, /* nb_bool */
0, /* nb_invert */
0, /* nb_lshift */
0, /* nb_rshift */
0, /* nb_and */
0, /* nb_xor */
0, /* nb_or */
(unaryfunc)interpid_int, /* nb_int */
0, /* nb_reserved */
0, /* nb_float */
0, /* nb_inplace_add */
0, /* nb_inplace_subtract */
0, /* nb_inplace_multiply */
0, /* nb_inplace_remainder */
0, /* nb_inplace_power */
0, /* nb_inplace_lshift */
0, /* nb_inplace_rshift */
0, /* nb_inplace_and */
0, /* nb_inplace_xor */
0, /* nb_inplace_or */
0, /* nb_floor_divide */
0, /* nb_true_divide */
0, /* nb_inplace_floor_divide */
0, /* nb_inplace_true_divide */
(unaryfunc)interpid_int, /* nb_index */
};
static Py_hash_t
interpid_hash(PyObject *self)
{
interpid *id = (interpid *)self;
PyObject *obj = PyLong_FromLongLong(id->id);
if (obj == NULL) {
return -1;
}
Py_hash_t hash = PyObject_Hash(obj);
Py_DECREF(obj);
return hash;
}
static PyObject *
interpid_richcompare(PyObject *self, PyObject *other, int op)
{
if (op != Py_EQ && op != Py_NE) {
Py_RETURN_NOTIMPLEMENTED;
}
if (!PyObject_TypeCheck(self, &_PyInterpreterID_Type)) {
Py_RETURN_NOTIMPLEMENTED;
}
interpid *id = (interpid *)self;
int equal;
if (PyObject_TypeCheck(other, &_PyInterpreterID_Type)) {
interpid *otherid = (interpid *)other;
equal = (id->id == otherid->id);
}
else if (PyLong_CheckExact(other)) {
/* Fast path */
int overflow;
long long otherid = PyLong_AsLongLongAndOverflow(other, &overflow);
if (otherid == -1 && PyErr_Occurred()) {
return NULL;
}
equal = !overflow && (otherid >= 0) && (id->id == otherid);
}
else if (PyNumber_Check(other)) {
PyObject *pyid = PyLong_FromLongLong(id->id);
if (pyid == NULL) {
return NULL;
}
PyObject *res = PyObject_RichCompare(pyid, other, op);
Py_DECREF(pyid);
return res;
}
else {
Py_RETURN_NOTIMPLEMENTED;
}
if ((op == Py_EQ && equal) || (op == Py_NE && !equal)) {
Py_RETURN_TRUE;
}
Py_RETURN_FALSE;
}
PyDoc_STRVAR(interpid_doc,
"A interpreter ID identifies a interpreter and may be used as an int.");
PyTypeObject _PyInterpreterID_Type = {
PyVarObject_HEAD_INIT(&PyType_Type, 0)
"InterpreterID", /* tp_name */
sizeof(interpid), /* tp_basicsize */
0, /* tp_itemsize */
(destructor)interpid_dealloc, /* tp_dealloc */
0, /* tp_vectorcall_offset */
0, /* tp_getattr */
0, /* tp_setattr */
0, /* tp_as_async */
(reprfunc)interpid_repr, /* tp_repr */
&interpid_as_number, /* tp_as_number */
0, /* tp_as_sequence */
0, /* tp_as_mapping */
interpid_hash, /* tp_hash */
0, /* tp_call */
(reprfunc)interpid_str, /* tp_str */
0, /* tp_getattro */
0, /* tp_setattro */
0, /* tp_as_buffer */
Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE, /* tp_flags */
interpid_doc, /* tp_doc */
0, /* tp_traverse */
0, /* tp_clear */
interpid_richcompare, /* tp_richcompare */
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 */
0, /* tp_alloc */
interpid_new, /* tp_new */
};
PyObject *_PyInterpreterID_New(int64_t id)
{
return (PyObject *)newinterpid(&_PyInterpreterID_Type, id, 0);
}
PyObject *
_PyInterpreterState_GetIDObject(PyInterpreterState *interp)
{
if (_PyInterpreterState_IDInitref(interp) != 0) {
return NULL;
};
int64_t id = PyInterpreterState_GetID(interp);
if (id < 0) {
return NULL;
}
return (PyObject *)newinterpid(&_PyInterpreterID_Type, id, 0);
}
PyInterpreterState *
_PyInterpreterID_LookUp(PyObject *requested_id)
{
int64_t id;
if (!interp_id_converter(requested_id, &id)) {
return NULL;
}
return _PyInterpreterState_LookUpID(id);
}