Mercurial > cpython-lru_cache-weakref

comparison Python/sysmodule.c @ 14308:b8b3f76ffd51 legacy-trunk

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add user-modifiable recursion_limit ceval.c: define recurion_limit (static), default value is 2500 define Py_GetRecursionLimit and Py_SetRecursionLimit raise RuntimeError if limit is exceeded PC/config.h: remove plat-specific definition sysmodule.c: add sys.(get|set)recursionlimit
author Jeremy Hylton <jeremy@alum.mit.edu>
date Thu, 31 Aug 2000 19:23:01 +0000
parents e5253b692e9f
children 6f6f965c5e2d
comparison
equal deleted inserted replaced
14307:b24db770dffd 14308:b8b3f76ffd51
197 "setcheckinterval(n)\n\ 197 "setcheckinterval(n)\n\
198 \n\ 198 \n\
199 Tell the Python interpreter to check for asynchronous events every\n\ 199 Tell the Python interpreter to check for asynchronous events every\n\
200 n instructions. This also affects how often thread switches occur."; 200 n instructions. This also affects how often thread switches occur.";
201 201
202 static PyObject *
203 sys_setrecursionlimit(PyObject *self, PyObject *args)
204 {
205 int new_limit;
206 if (!PyArg_ParseTuple(args, "i:setrecursionlimit", &new_limit))
207 return NULL;
208 if (new_limit <= 0) {
209 PyErr_SetString(PyExc_ValueError,
210 "recursion limit must be positive");
211 return NULL;
212 }
213 Py_SetRecursionLimit(new_limit);
214 Py_INCREF(Py_None);
215 return Py_None;
216 }
217
218 static char setrecursionlimit_doc[] =
219 "setrecursionlimit(n)\n\
220 \n\
221 Set the maximum depth of the Python interpreter stack to n. This\n\
222 limit prevents infinite recursion from causing an overflow of the C\n\
223 stack and crashing Python. The highest possible limit is platform-\n\
224 dependent.";
225
226 static PyObject *
227 sys_getrecursionlimit(PyObject *self, PyObject *args)
228 {
229 if (!PyArg_ParseTuple(args, ":getrecursionlimit"))
230 return NULL;
231 return PyInt_FromLong(Py_GetRecursionLimit());
232 }
233
234 static char getrecursionlimit_doc[] =
235 "getrecursionlimit()\n\
236 \n\
237 Return the current value of the recursion limit, the maximum depth\n\
238 of the Python interpreter stack. This limit prevents infinite\n\
239 recursion from causing an overflow of the C stack and crashing Python.";
240
202 #ifdef USE_MALLOPT 241 #ifdef USE_MALLOPT
203 /* Link with -lmalloc (or -lmpc) on an SGI */ 242 /* Link with -lmalloc (or -lmpc) on an SGI */
204 #include <malloc.h> 243 #include <malloc.h>
205 244
206 static PyObject * 245 static PyObject *
266 305
267 static PyMethodDef sys_methods[] = { 306 static PyMethodDef sys_methods[] = {
268 /* Might as well keep this in alphabetic order */ 307 /* Might as well keep this in alphabetic order */
269 {"exc_info", sys_exc_info, 1, exc_info_doc}, 308 {"exc_info", sys_exc_info, 1, exc_info_doc},
270 {"exit", sys_exit, 0, exit_doc}, 309 {"exit", sys_exit, 0, exit_doc},
271 {"getdefaultencoding", sys_getdefaultencoding, 1, getdefaultencoding_doc}, 310 {"getdefaultencoding", sys_getdefaultencoding, 1,
311 getdefaultencoding_doc},
272 #ifdef COUNT_ALLOCS 312 #ifdef COUNT_ALLOCS
273 {"getcounts", sys_getcounts, 1}, 313 {"getcounts", sys_getcounts, 1},
274 #endif 314 #endif
275 #ifdef DYNAMIC_EXECUTION_PROFILE 315 #ifdef DYNAMIC_EXECUTION_PROFILE
276 {"getdxp", _Py_GetDXProfile, 1}, 316 {"getdxp", _Py_GetDXProfile, 1},
278 #ifdef Py_TRACE_REFS 318 #ifdef Py_TRACE_REFS
279 {"getobjects", _Py_GetObjects, 1}, 319 {"getobjects", _Py_GetObjects, 1},
280 {"gettotalrefcount", sys_gettotalrefcount, 1}, 320 {"gettotalrefcount", sys_gettotalrefcount, 1},
281 #endif 321 #endif
282 {"getrefcount", sys_getrefcount, 1, getrefcount_doc}, 322 {"getrefcount", sys_getrefcount, 1, getrefcount_doc},
323 {"getrecursionlimit", sys_getrecursionlimit, 1,
324 getrecursionlimit_doc},
283 #ifdef USE_MALLOPT 325 #ifdef USE_MALLOPT
284 {"mdebug", sys_mdebug, 1}, 326 {"mdebug", sys_mdebug, 1},
285 #endif 327 #endif
286 {"setdefaultencoding", sys_setdefaultencoding, 1, setdefaultencoding_doc}, 328 {"setdefaultencoding", sys_setdefaultencoding, 1,
287 {"setcheckinterval", sys_setcheckinterval, 1, setcheckinterval_doc}, 329 setdefaultencoding_doc},
330 {"setcheckinterval", sys_setcheckinterval, 1,
331 setcheckinterval_doc},
288 {"setprofile", sys_setprofile, 0, setprofile_doc}, 332 {"setprofile", sys_setprofile, 0, setprofile_doc},
333 {"setrecursionlimit", sys_setrecursionlimit, 1,
334 setrecursionlimit_doc},
289 {"settrace", sys_settrace, 0, settrace_doc}, 335 {"settrace", sys_settrace, 0, settrace_doc},
290 {NULL, NULL} /* sentinel */ 336 {NULL, NULL} /* sentinel */
291 }; 337 };
292 338
293 static PyObject * 339 static PyObject *
374 Functions:\n\ 420 Functions:\n\
375 \n\ 421 \n\
376 exc_info() -- return thread-safe information about the current exception\n\ 422 exc_info() -- return thread-safe information about the current exception\n\
377 exit() -- exit the interpreter by raising SystemExit\n\ 423 exit() -- exit the interpreter by raising SystemExit\n\
378 getrefcount() -- return the reference count for an object (plus one :-)\n\ 424 getrefcount() -- return the reference count for an object (plus one :-)\n\
425 getrecursionlimit() -- return the max recursion depth for the interpreter\n\
379 setcheckinterval() -- control how often the interpreter checks for events\n\ 426 setcheckinterval() -- control how often the interpreter checks for events\n\
380 setprofile() -- set the global profiling function\n\ 427 setprofile() -- set the global profiling function\n\
428 setrecursionlimit() -- set the max recursion depth for the interpreter\n\
381 settrace() -- set the global debug tracing function\n\ 429 settrace() -- set the global debug tracing function\n\
382 " 430 "
383 #endif 431 #endif
384 /* end of sys_doc */ ; 432 /* end of sys_doc */ ;
385 433