mirrors/cpython
1
0
Fork 0
mirror of https://github.com/python/cpython.git synced 2025-11-01 10:45:30 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions 15

Limit free list of method and builtin function objects to 256 entries each.

Browse source
This commit is contained in:
Christian Heimes 2008-02-06 12:44:34 +00:00
parent 45eda64691
commit 6075a82243
3 changed files with 38 additions and 8 deletions
Download patch file Download diff file Expand all files Collapse all files

23
Objects/classobject.c
View file

@ -4,10 +4,16 @@
#include "Python.h"
#include "structmember.h"
/* Free list for method objects to safe malloc/free overhead
* The im_self element is used to chain the elements.
*/
static PyMethodObject *free_list;
static int numfree = 0;
#define MAXFREELIST 256
#define TP_DESCR_GET(t) \
(PyType_HasFeature(t, Py_TPFLAGS_HAVE_CLASS) ? (t)->tp_descr_get : NULL)
/* Forward */
static PyObject *class_lookup(PyClassObject *, PyObject *,
PyClassObject **);
@ -2193,8 +2199,6 @@ PyTypeObject PyInstance_Type = {
In case (b), im_self is NULL
*/
static PyMethodObject *free_list;
PyObject *
PyMethod_New(PyObject *func, PyObject *self, PyObject *klass)
{
@ -2207,6 +2211,7 @@ PyMethod_New(PyObject *func, PyObject *self, PyObject *klass)
if (im != NULL) {
free_list = (PyMethodObject *)(im->im_self);
PyObject_INIT(im, &PyMethod_Type);
numfree--;
}
else {
im = PyObject_GC_New(PyMethodObject, &PyMethod_Type);
@ -2332,8 +2337,14 @@ instancemethod_dealloc(register PyMethodObject *im)
Py_DECREF(im->im_func);
Py_XDECREF(im->im_self);
Py_XDECREF(im->im_class);
im->im_self = (PyObject *)free_list;
free_list = im;
if (numfree < MAXFREELIST) {
im->im_self = (PyObject *)free_list;
free_list = im;
numfree++;
}
else {
PyObject_GC_Del(im);
}
}
static int
@ -2620,5 +2631,7 @@ PyMethod_Fini(void)
PyMethodObject *im = free_list;
free_list = (PyMethodObject *)(im->im_self);
PyObject_GC_Del(im);
numfree--;
}
assert(numfree == 0);
}