Mercurial > cpython-lru_cache-weakref

annotate Modules/_cryptmodule.c @ 87690:66c1c9f32567 default tip

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Add use_weakref option to functools.lru_cache The use_weakref option makes lru_cache create weak references to the function arguments when creating the cache key, which prevents them from staying in the memory forever even after all other references to them are gone. This is a proof of concept for http://bugs.python.org/issue19859
author Radomir Dopieralski <devel@sheep.art.pl>
date Tue, 03 Dec 2013 16:02:48 +0100
parents 372b2ef0ff37
children
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1 /* cryptmodule.c - by Steve Majewski
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2 */
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3
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4 #include "Python.h"
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5
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6 #include <sys/types.h>
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7
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8 #ifdef __VMS
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9 #include <openssl/des.h>
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10 #endif
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12 /* Module crypt */
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15 static PyObject *crypt_crypt(PyObject *self, PyObject *args)
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16 {
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17 char *word, *salt;
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18 #ifndef __VMS
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19 extern char * crypt(const char *, const char *);
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20 #endif
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22 if (!PyArg_ParseTuple(args, "ss:crypt", &word, &salt)) {
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23 return NULL;
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24 }
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25 /* On some platforms (AtheOS) crypt returns NULL for an invalid
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26 salt. Return None in that case. XXX Maybe raise an exception? */
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27 return Py_BuildValue("s", crypt(word, salt));
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29 }
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31 PyDoc_STRVAR(crypt_crypt__doc__,
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32 "crypt(word, salt) -> string\n\
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33 word will usually be a user's password. salt is a 2-character string\n\
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34 which will be used to select one of 4096 variations of DES. The characters\n\
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35 in salt must be either \".\", \"/\", or an alphanumeric character. Returns\n\
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36 the hashed password as a string, which will be composed of characters from\n\
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37 the same alphabet as the salt.");
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40 static PyMethodDef crypt_methods[] = {
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41 {"crypt", crypt_crypt, METH_VARARGS, crypt_crypt__doc__},
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42 {NULL, NULL} /* sentinel */
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43 };
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46 static struct PyModuleDef cryptmodule = {
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47 PyModuleDef_HEAD_INIT,
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48 "_crypt",
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49 NULL,
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50 -1,
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51 crypt_methods,
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52 NULL,
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53 NULL,
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54 NULL,
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55 NULL
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56 };
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57
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58 PyMODINIT_FUNC
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59 PyInit__crypt(void)
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60 {
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61 return PyModule_Create(&cryptmodule);
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62 }