mirror of
https://github.com/python/cpython.git
synced 2024-12-15 12:54:31 +08:00
62be74290a
Fix invalid function cast warnings with gcc 8 for method conventions different from METH_NOARGS, METH_O and METH_VARARGS excluding Argument Clinic generated code.
355 lines
8.9 KiB
C
355 lines
8.9 KiB
C
/*
|
|
* atexit - allow programmer to define multiple exit functions to be executed
|
|
* upon normal program termination.
|
|
*
|
|
* Translated from atexit.py by Collin Winter.
|
|
+ Copyright 2007 Python Software Foundation.
|
|
*/
|
|
|
|
#include "Python.h"
|
|
|
|
/* Forward declaration (for atexit_cleanup) */
|
|
static PyObject *atexit_clear(PyObject*, PyObject*);
|
|
/* Forward declaration of module object */
|
|
static struct PyModuleDef atexitmodule;
|
|
|
|
/* ===================================================================== */
|
|
/* Callback machinery. */
|
|
|
|
typedef struct {
|
|
PyObject *func;
|
|
PyObject *args;
|
|
PyObject *kwargs;
|
|
} atexit_callback;
|
|
|
|
typedef struct {
|
|
atexit_callback **atexit_callbacks;
|
|
int ncallbacks;
|
|
int callback_len;
|
|
} atexitmodule_state;
|
|
|
|
#define GET_ATEXIT_STATE(mod) ((atexitmodule_state*)PyModule_GetState(mod))
|
|
|
|
|
|
static void
|
|
atexit_delete_cb(atexitmodule_state *modstate, int i)
|
|
{
|
|
atexit_callback *cb;
|
|
|
|
cb = modstate->atexit_callbacks[i];
|
|
modstate->atexit_callbacks[i] = NULL;
|
|
Py_DECREF(cb->func);
|
|
Py_DECREF(cb->args);
|
|
Py_XDECREF(cb->kwargs);
|
|
PyMem_Free(cb);
|
|
}
|
|
|
|
/* Clear all callbacks without calling them */
|
|
static void
|
|
atexit_cleanup(atexitmodule_state *modstate)
|
|
{
|
|
atexit_callback *cb;
|
|
int i;
|
|
for (i = 0; i < modstate->ncallbacks; i++) {
|
|
cb = modstate->atexit_callbacks[i];
|
|
if (cb == NULL)
|
|
continue;
|
|
|
|
atexit_delete_cb(modstate, i);
|
|
}
|
|
modstate->ncallbacks = 0;
|
|
}
|
|
|
|
/* Installed into pylifecycle.c's atexit mechanism */
|
|
|
|
static void
|
|
atexit_callfuncs(PyObject *module)
|
|
{
|
|
PyObject *exc_type = NULL, *exc_value, *exc_tb, *r;
|
|
atexit_callback *cb;
|
|
atexitmodule_state *modstate;
|
|
int i;
|
|
|
|
if (module == NULL)
|
|
return;
|
|
modstate = GET_ATEXIT_STATE(module);
|
|
|
|
if (modstate->ncallbacks == 0)
|
|
return;
|
|
|
|
|
|
for (i = modstate->ncallbacks - 1; i >= 0; i--)
|
|
{
|
|
cb = modstate->atexit_callbacks[i];
|
|
if (cb == NULL)
|
|
continue;
|
|
|
|
r = PyObject_Call(cb->func, cb->args, cb->kwargs);
|
|
Py_XDECREF(r);
|
|
if (r == NULL) {
|
|
/* Maintain the last exception, but don't leak if there are
|
|
multiple exceptions. */
|
|
if (exc_type) {
|
|
Py_DECREF(exc_type);
|
|
Py_XDECREF(exc_value);
|
|
Py_XDECREF(exc_tb);
|
|
}
|
|
PyErr_Fetch(&exc_type, &exc_value, &exc_tb);
|
|
if (!PyErr_GivenExceptionMatches(exc_type, PyExc_SystemExit)) {
|
|
PySys_WriteStderr("Error in atexit._run_exitfuncs:\n");
|
|
PyErr_NormalizeException(&exc_type, &exc_value, &exc_tb);
|
|
PyErr_Display(exc_type, exc_value, exc_tb);
|
|
}
|
|
}
|
|
}
|
|
|
|
atexit_cleanup(modstate);
|
|
|
|
if (exc_type)
|
|
PyErr_Restore(exc_type, exc_value, exc_tb);
|
|
}
|
|
|
|
/* ===================================================================== */
|
|
/* Module methods. */
|
|
|
|
PyDoc_STRVAR(atexit_register__doc__,
|
|
"register(func, *args, **kwargs) -> func\n\
|
|
\n\
|
|
Register a function to be executed upon normal program termination\n\
|
|
\n\
|
|
func - function to be called at exit\n\
|
|
args - optional arguments to pass to func\n\
|
|
kwargs - optional keyword arguments to pass to func\n\
|
|
\n\
|
|
func is returned to facilitate usage as a decorator.");
|
|
|
|
static PyObject *
|
|
atexit_register(PyObject *self, PyObject *args, PyObject *kwargs)
|
|
{
|
|
atexitmodule_state *modstate;
|
|
atexit_callback *new_callback;
|
|
PyObject *func = NULL;
|
|
|
|
modstate = GET_ATEXIT_STATE(self);
|
|
|
|
if (modstate->ncallbacks >= modstate->callback_len) {
|
|
atexit_callback **r;
|
|
modstate->callback_len += 16;
|
|
r = (atexit_callback**)PyMem_Realloc(modstate->atexit_callbacks,
|
|
sizeof(atexit_callback*) * modstate->callback_len);
|
|
if (r == NULL)
|
|
return PyErr_NoMemory();
|
|
modstate->atexit_callbacks = r;
|
|
}
|
|
|
|
if (PyTuple_GET_SIZE(args) == 0) {
|
|
PyErr_SetString(PyExc_TypeError,
|
|
"register() takes at least 1 argument (0 given)");
|
|
return NULL;
|
|
}
|
|
|
|
func = PyTuple_GET_ITEM(args, 0);
|
|
if (!PyCallable_Check(func)) {
|
|
PyErr_SetString(PyExc_TypeError,
|
|
"the first argument must be callable");
|
|
return NULL;
|
|
}
|
|
|
|
new_callback = PyMem_Malloc(sizeof(atexit_callback));
|
|
if (new_callback == NULL)
|
|
return PyErr_NoMemory();
|
|
|
|
new_callback->args = PyTuple_GetSlice(args, 1, PyTuple_GET_SIZE(args));
|
|
if (new_callback->args == NULL) {
|
|
PyMem_Free(new_callback);
|
|
return NULL;
|
|
}
|
|
new_callback->func = func;
|
|
new_callback->kwargs = kwargs;
|
|
Py_INCREF(func);
|
|
Py_XINCREF(kwargs);
|
|
|
|
modstate->atexit_callbacks[modstate->ncallbacks++] = new_callback;
|
|
|
|
Py_INCREF(func);
|
|
return func;
|
|
}
|
|
|
|
PyDoc_STRVAR(atexit_run_exitfuncs__doc__,
|
|
"_run_exitfuncs() -> None\n\
|
|
\n\
|
|
Run all registered exit functions.");
|
|
|
|
static PyObject *
|
|
atexit_run_exitfuncs(PyObject *self, PyObject *unused)
|
|
{
|
|
atexit_callfuncs(self);
|
|
if (PyErr_Occurred())
|
|
return NULL;
|
|
Py_RETURN_NONE;
|
|
}
|
|
|
|
PyDoc_STRVAR(atexit_clear__doc__,
|
|
"_clear() -> None\n\
|
|
\n\
|
|
Clear the list of previously registered exit functions.");
|
|
|
|
static PyObject *
|
|
atexit_clear(PyObject *self, PyObject *unused)
|
|
{
|
|
atexit_cleanup(GET_ATEXIT_STATE(self));
|
|
Py_RETURN_NONE;
|
|
}
|
|
|
|
PyDoc_STRVAR(atexit_ncallbacks__doc__,
|
|
"_ncallbacks() -> int\n\
|
|
\n\
|
|
Return the number of registered exit functions.");
|
|
|
|
static PyObject *
|
|
atexit_ncallbacks(PyObject *self, PyObject *unused)
|
|
{
|
|
atexitmodule_state *modstate;
|
|
|
|
modstate = GET_ATEXIT_STATE(self);
|
|
|
|
return PyLong_FromSsize_t(modstate->ncallbacks);
|
|
}
|
|
|
|
static int
|
|
atexit_m_traverse(PyObject *self, visitproc visit, void *arg)
|
|
{
|
|
int i;
|
|
atexitmodule_state *modstate;
|
|
|
|
modstate = GET_ATEXIT_STATE(self);
|
|
if (modstate != NULL) {
|
|
for (i = 0; i < modstate->ncallbacks; i++) {
|
|
atexit_callback *cb = modstate->atexit_callbacks[i];
|
|
if (cb == NULL)
|
|
continue;
|
|
Py_VISIT(cb->func);
|
|
Py_VISIT(cb->args);
|
|
Py_VISIT(cb->kwargs);
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
atexit_m_clear(PyObject *self)
|
|
{
|
|
atexitmodule_state *modstate;
|
|
modstate = GET_ATEXIT_STATE(self);
|
|
if (modstate != NULL) {
|
|
atexit_cleanup(modstate);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static void
|
|
atexit_free(PyObject *m)
|
|
{
|
|
atexitmodule_state *modstate;
|
|
modstate = GET_ATEXIT_STATE(m);
|
|
if (modstate != NULL) {
|
|
atexit_cleanup(modstate);
|
|
PyMem_Free(modstate->atexit_callbacks);
|
|
}
|
|
}
|
|
|
|
PyDoc_STRVAR(atexit_unregister__doc__,
|
|
"unregister(func) -> None\n\
|
|
\n\
|
|
Unregister an exit function which was previously registered using\n\
|
|
atexit.register\n\
|
|
\n\
|
|
func - function to be unregistered");
|
|
|
|
static PyObject *
|
|
atexit_unregister(PyObject *self, PyObject *func)
|
|
{
|
|
atexitmodule_state *modstate;
|
|
atexit_callback *cb;
|
|
int i, eq;
|
|
|
|
modstate = GET_ATEXIT_STATE(self);
|
|
|
|
for (i = 0; i < modstate->ncallbacks; i++)
|
|
{
|
|
cb = modstate->atexit_callbacks[i];
|
|
if (cb == NULL)
|
|
continue;
|
|
|
|
eq = PyObject_RichCompareBool(cb->func, func, Py_EQ);
|
|
if (eq < 0)
|
|
return NULL;
|
|
if (eq)
|
|
atexit_delete_cb(modstate, i);
|
|
}
|
|
Py_RETURN_NONE;
|
|
}
|
|
|
|
static PyMethodDef atexit_methods[] = {
|
|
{"register", (PyCFunction)(void(*)(void)) atexit_register, METH_VARARGS|METH_KEYWORDS,
|
|
atexit_register__doc__},
|
|
{"_clear", (PyCFunction) atexit_clear, METH_NOARGS,
|
|
atexit_clear__doc__},
|
|
{"unregister", (PyCFunction) atexit_unregister, METH_O,
|
|
atexit_unregister__doc__},
|
|
{"_run_exitfuncs", (PyCFunction) atexit_run_exitfuncs, METH_NOARGS,
|
|
atexit_run_exitfuncs__doc__},
|
|
{"_ncallbacks", (PyCFunction) atexit_ncallbacks, METH_NOARGS,
|
|
atexit_ncallbacks__doc__},
|
|
{NULL, NULL} /* sentinel */
|
|
};
|
|
|
|
/* ===================================================================== */
|
|
/* Initialization function. */
|
|
|
|
PyDoc_STRVAR(atexit__doc__,
|
|
"allow programmer to define multiple exit functions to be executed\
|
|
upon normal program termination.\n\
|
|
\n\
|
|
Two public functions, register and unregister, are defined.\n\
|
|
");
|
|
|
|
static int
|
|
atexit_exec(PyObject *m) {
|
|
atexitmodule_state *modstate;
|
|
|
|
modstate = GET_ATEXIT_STATE(m);
|
|
modstate->callback_len = 32;
|
|
modstate->ncallbacks = 0;
|
|
modstate->atexit_callbacks = PyMem_New(atexit_callback*,
|
|
modstate->callback_len);
|
|
if (modstate->atexit_callbacks == NULL)
|
|
return -1;
|
|
|
|
_Py_PyAtExit(atexit_callfuncs, m);
|
|
return 0;
|
|
}
|
|
|
|
static PyModuleDef_Slot atexit_slots[] = {
|
|
{Py_mod_exec, atexit_exec},
|
|
{0, NULL}
|
|
};
|
|
|
|
static struct PyModuleDef atexitmodule = {
|
|
PyModuleDef_HEAD_INIT,
|
|
"atexit",
|
|
atexit__doc__,
|
|
sizeof(atexitmodule_state),
|
|
atexit_methods,
|
|
atexit_slots,
|
|
atexit_m_traverse,
|
|
atexit_m_clear,
|
|
(freefunc)atexit_free
|
|
};
|
|
|
|
PyMODINIT_FUNC
|
|
PyInit_atexit(void)
|
|
{
|
|
return PyModuleDef_Init(&atexitmodule);
|
|
}
|