Mercurial > cpython-lru_cache-weakref

comparison Python/pythonrun.c @ 6547:724382af5339 legacy-trunk

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Two independent changes (alas): - The interp->builtins variable (and hence, __main__.__builtins__) is once again initialized to the built-in *module* instead of its dictionary. - The finalization order is once again changed. Signals are finalized relatively early, because (1) it DECREF's the signal handlers, and if a signal handler happens to be a bound method, deleting it could cause problems when there's no current thread around, and (2) we don't want to risk executing signal handlers during finalization.
author Guido van Rossum <guido@python.org>
date Mon, 03 Nov 1997 21:58:47 +0000
parents 1afcac7658e5
children b331cd47e0bc
comparison
equal deleted inserted replaced
6546:c915c94ebb6b 6547:724382af5339
67 PyObject *globals, PyObject *locals)); 67 PyObject *globals, PyObject *locals));
68 static PyObject *run_pyc_file Py_PROTO((FILE *fp, char *filename, 68 static PyObject *run_pyc_file Py_PROTO((FILE *fp, char *filename,
69 PyObject *globals, PyObject *locals)); 69 PyObject *globals, PyObject *locals));
70 static void err_input Py_PROTO((perrdetail *)); 70 static void err_input Py_PROTO((perrdetail *));
71 static void initsigs Py_PROTO((void)); 71 static void initsigs Py_PROTO((void));
72 static void finisigs Py_PROTO((void));
73 static void call_sys_exitfunc Py_PROTO((void)); 72 static void call_sys_exitfunc Py_PROTO((void));
74 static void call_ll_exitfuncs Py_PROTO((void)); 73 static void call_ll_exitfuncs Py_PROTO((void));
75 74
76 int Py_DebugFlag; /* Needed by parser.c */ 75 int Py_DebugFlag; /* Needed by parser.c */
77 int Py_VerboseFlag; /* Needed by import.c */ 76 int Py_VerboseFlag; /* Needed by import.c */
78 int Py_InteractiveFlag; /* Needed by Py_FdIsInteractive() below */ 77 int Py_InteractiveFlag; /* Needed by Py_FdIsInteractive() below */
79 int Py_NoSiteFlag; /* Suppress 'import site' */ 78 int Py_NoSiteFlag; /* Suppress 'import site' */
80 int Py_UseClassExceptionsFlag = 1; /* Needed by bltinmodule.c */ 79 int Py_UseClassExceptionsFlag = 1; /* Needed by bltinmodule.c */
80 int Py_UsingLocale = 0; /* needed by compile.c, modified by localemodule */
81 81
82 static int initialized = 0; 82 static int initialized = 0;
83 83
84 /* API to access the initialized flag -- useful for eroteric use */ 84 /* API to access the initialized flag -- useful for eroteric use */
85 85
132 Py_FatalError("Py_Initialize: can't make modules dictionary"); 132 Py_FatalError("Py_Initialize: can't make modules dictionary");
133 133
134 bimod = _PyBuiltin_Init_1(); 134 bimod = _PyBuiltin_Init_1();
135 if (bimod == NULL) 135 if (bimod == NULL)
136 Py_FatalError("Py_Initialize: can't initialize __builtin__"); 136 Py_FatalError("Py_Initialize: can't initialize __builtin__");
137 interp->builtins = PyModule_GetDict(bimod); 137 Py_INCREF(bimod);
138 Py_INCREF(interp->builtins); 138 interp->builtins = bimod;
139 139
140 sysmod = _PySys_Init(); 140 sysmod = _PySys_Init();
141 if (sysmod == NULL) 141 if (sysmod == NULL)
142 Py_FatalError("Py_Initialize: can't initialize sys"); 142 Py_FatalError("Py_Initialize: can't initialize sys");
143 interp->sysdict = PyModule_GetDict(sysmod); 143 interp->sysdict = PyModule_GetDict(sysmod);
146 PySys_SetPath(Py_GetPath()); 146 PySys_SetPath(Py_GetPath());
147 PyDict_SetItemString(interp->sysdict, "modules", 147 PyDict_SetItemString(interp->sysdict, "modules",
148 interp->modules); 148 interp->modules);
149 149
150 /* phase 2 of builtins */ 150 /* phase 2 of builtins */
151 _PyBuiltin_Init_2(interp->builtins); 151 _PyBuiltin_Init_2(PyModule_GetDict(bimod));
152 _PyImport_FixupExtension("__builtin__", "__builtin__"); 152 _PyImport_FixupExtension("__builtin__", "__builtin__");
153 153
154 _PyImport_Init(); 154 _PyImport_Init();
155 155
156 initsigs(); /* Signal handling stuff, including initintr() */ 156 initsigs(); /* Signal handling stuff, including initintr() */
184 184
185 if (!initialized) 185 if (!initialized)
186 return; 186 return;
187 initialized = 0; 187 initialized = 0;
188 188
189 /* We must call this before the current thread gets removed because 189 /* Get current thread state and interpreter pointer */
190 it decrefs class instances, which in turn save and restore the
191 current error state, which is a per thread data structure.
192 */
193 _PyBuiltin_Fini_1();
194
195 tstate = PyThreadState_Get(); 190 tstate = PyThreadState_Get();
196 interp = tstate->interp; 191 interp = tstate->interp;
197 192
193 /* Disable signal handling */
194 PyOS_FiniInterrupts();
195
196 /* Destroy PyExc_MemoryErrorInst */
197 _PyBuiltin_Fini_1();
198
199 /* Destroy all modules */
198 PyImport_Cleanup(); 200 PyImport_Cleanup();
201
202 /* Delete current thread
199 PyInterpreterState_Clear(interp); 203 PyInterpreterState_Clear(interp);
200 PyThreadState_Swap(NULL); 204 PyThreadState_Swap(NULL);
201 PyInterpreterState_Delete(interp); 205 PyInterpreterState_Delete(interp);
202 206
203 finisigs();
204 _PyImport_Fini(); 207 _PyImport_Fini();
205 208
206 /* Now we decref the exception classes. After this point nothing 209 /* Now we decref the exception classes. After this point nothing
207 can raise an exception. That's okay, because each Fini() method 210 can raise an exception. That's okay, because each Fini() method
208 below has been checked to make sure no exceptions are ever 211 below has been checked to make sure no exceptions are ever
282 285
283 interp->modules = PyDict_New(); 286 interp->modules = PyDict_New();
284 287
285 bimod = _PyImport_FindExtension("__builtin__", "__builtin__"); 288 bimod = _PyImport_FindExtension("__builtin__", "__builtin__");
286 if (bimod != NULL) { 289 if (bimod != NULL) {
287 interp->builtins = PyModule_GetDict(bimod); 290 Py_INCREF(bimod);
288 Py_INCREF(interp->builtins); 291 interp->builtins = bimod;
289 } 292 }
290 sysmod = _PyImport_FindExtension("sys", "sys"); 293 sysmod = _PyImport_FindExtension("sys", "sys");
291 if (bimod != NULL && sysmod != NULL) { 294 if (bimod != NULL && sysmod != NULL) {
292 interp->sysdict = PyModule_GetDict(sysmod); 295 interp->sysdict = PyModule_GetDict(sysmod);
293 Py_INCREF(interp->sysdict); 296 Py_INCREF(interp->sysdict);
1100 #endif 1103 #endif
1101 #endif /* HAVE_SIGNAL_H */ 1104 #endif /* HAVE_SIGNAL_H */
1102 PyOS_InitInterrupts(); /* May imply initsignal() */ 1105 PyOS_InitInterrupts(); /* May imply initsignal() */
1103 } 1106 }
1104 1107
1105 static void
1106 finisigs()
1107 {
1108 PyOS_FiniInterrupts(); /* May imply finisignal() */
1109 }
1110
1111 #ifdef Py_TRACE_REFS 1108 #ifdef Py_TRACE_REFS
1112 /* Ask a yes/no question */ 1109 /* Ask a yes/no question */
1113 1110
1114 int 1111 int
1115 _Py_AskYesNo(prompt) 1112 _Py_AskYesNo(prompt)