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e8752d7b80
This exposes `PyUnstable_Object_ClearWeakRefsNoCallbacks` as an unstable C-API function to provide a thread-safe mechanism for clearing weakrefs without executing callbacks. Some C-API extensions need to clear weakrefs without calling callbacks, such as after running finalizers like we do in subtype_dealloc. Previously they could use `_PyWeakref_ClearRef` on each weakref, but that's not thread-safe in the free-threaded build. Co-authored-by: Petr Viktorin <encukou@gmail.com>
146 lines
3.1 KiB
C
146 lines
3.1 KiB
C
#include "parts.h"
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#include "util.h"
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static PyObject *
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call_pyobject_print(PyObject *self, PyObject * args)
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{
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PyObject *object;
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PyObject *filename;
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PyObject *print_raw;
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FILE *fp;
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int flags = 0;
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if (!PyArg_UnpackTuple(args, "call_pyobject_print", 3, 3,
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&object, &filename, &print_raw)) {
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return NULL;
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}
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fp = _Py_fopen_obj(filename, "w+");
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if (Py_IsTrue(print_raw)) {
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flags = Py_PRINT_RAW;
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}
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if (PyObject_Print(object, fp, flags) < 0) {
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fclose(fp);
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return NULL;
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}
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fclose(fp);
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Py_RETURN_NONE;
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}
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static PyObject *
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pyobject_print_null(PyObject *self, PyObject *args)
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{
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PyObject *filename;
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FILE *fp;
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if (!PyArg_UnpackTuple(args, "call_pyobject_print", 1, 1, &filename)) {
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return NULL;
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}
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fp = _Py_fopen_obj(filename, "w+");
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if (PyObject_Print(NULL, fp, 0) < 0) {
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fclose(fp);
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return NULL;
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}
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fclose(fp);
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Py_RETURN_NONE;
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}
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static PyObject *
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pyobject_print_noref_object(PyObject *self, PyObject *args)
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{
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PyObject *test_string;
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PyObject *filename;
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FILE *fp;
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char correct_string[100];
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test_string = PyUnicode_FromString("Spam spam spam");
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Py_SET_REFCNT(test_string, 0);
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PyOS_snprintf(correct_string, 100, "<refcnt %zd at %p>",
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Py_REFCNT(test_string), (void *)test_string);
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if (!PyArg_UnpackTuple(args, "call_pyobject_print", 1, 1, &filename)) {
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return NULL;
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}
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fp = _Py_fopen_obj(filename, "w+");
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if (PyObject_Print(test_string, fp, 0) < 0){
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fclose(fp);
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Py_SET_REFCNT(test_string, 1);
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Py_DECREF(test_string);
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return NULL;
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}
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fclose(fp);
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Py_SET_REFCNT(test_string, 1);
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Py_DECREF(test_string);
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return PyUnicode_FromString(correct_string);
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}
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static PyObject *
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pyobject_print_os_error(PyObject *self, PyObject *args)
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{
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PyObject *test_string;
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PyObject *filename;
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FILE *fp;
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test_string = PyUnicode_FromString("Spam spam spam");
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if (!PyArg_UnpackTuple(args, "call_pyobject_print", 1, 1, &filename)) {
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return NULL;
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}
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// open file in read mode to induce OSError
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fp = _Py_fopen_obj(filename, "r");
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if (PyObject_Print(test_string, fp, 0) < 0) {
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fclose(fp);
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Py_DECREF(test_string);
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return NULL;
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}
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fclose(fp);
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Py_DECREF(test_string);
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Py_RETURN_NONE;
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}
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static PyObject *
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pyobject_clear_weakrefs_no_callbacks(PyObject *self, PyObject *obj)
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{
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PyUnstable_Object_ClearWeakRefsNoCallbacks(obj);
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Py_RETURN_NONE;
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}
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static PyMethodDef test_methods[] = {
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{"call_pyobject_print", call_pyobject_print, METH_VARARGS},
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{"pyobject_print_null", pyobject_print_null, METH_VARARGS},
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{"pyobject_print_noref_object", pyobject_print_noref_object, METH_VARARGS},
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{"pyobject_print_os_error", pyobject_print_os_error, METH_VARARGS},
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{"pyobject_clear_weakrefs_no_callbacks", pyobject_clear_weakrefs_no_callbacks, METH_O},
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{NULL},
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};
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int
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_PyTestCapi_Init_Object(PyObject *m)
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{
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if (PyModule_AddFunctions(m, test_methods) < 0) {
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return -1;
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}
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return 0;
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}
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