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don't dictclear deleted modules in doneimport

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This commit is contained in:
Guido van Rossum 1995-01-26 00:41:28 +00:00
parent 8bf7c484c1
commit 0de81bfec9
1 changed files with 22 additions and 17 deletions
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39
Python/import.c
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@ -68,24 +68,17 @@ void
doneimport() doneimport()
{ {
if (import_modules != NULL) { if (import_modules != NULL) {
int pos; object *tmp = import_modules;
object *modname, *module;
/* Explicitly erase all modules; this is the safest way
to get rid of at least *some* circular dependencies */
pos = 0;
while (mappinggetnext(import_modules,
&pos, &modname, &module)) {
if (is_moduleobject(module)) {
object *dict;
dict = getmoduledict(module);
if (dict != NULL && is_dictobject(dict))
mappingclear(dict);
}
}
mappingclear(import_modules);
DECREF(import_modules);
}
import_modules = NULL; import_modules = NULL;
/* This deletes all modules from sys.modules.
When a module is deallocated, it in turn clears its dictionary,
thus hopefully breaking any circular references between modules
and between a module's dictionary and its functions.
Note that "import" will fail while we are cleaning up.
*/
mappingclear(tmp);
DECREF(tmp);
}
} }
@ -119,6 +112,10 @@ add_module(name)
{ {
object *m; object *m;
if (import_modules == NULL) {
err_setstr(SystemError, "sys.modules has been deleted");
return NULL;
}
if ((m = dictlookup(import_modules, name)) != NULL && if ((m = dictlookup(import_modules, name)) != NULL &&
is_moduleobject(m)) is_moduleobject(m))
return m; return m;
@ -574,6 +571,10 @@ import_module(name)
{ {
object *m; object *m;
if (import_modules == NULL) {
err_setstr(SystemError, "sys.modules has been deleted");
return NULL;
}
if ((m = dictlookup(import_modules, name)) != NULL) { if ((m = dictlookup(import_modules, name)) != NULL) {
INCREF(m); INCREF(m);
} }
@ -615,6 +616,10 @@ reload_module(m)
name = getmodulename(m); name = getmodulename(m);
if (name == NULL) if (name == NULL)
return NULL; return NULL;
if (import_modules == NULL) {
err_setstr(SystemError, "sys.modules has been deleted");
return NULL;
}
if (m != dictlookup(import_modules, name)) { if (m != dictlookup(import_modules, name)) {
err_setstr(ImportError, "reload() module not in sys.modules"); err_setstr(ImportError, "reload() module not in sys.modules");
return NULL; return NULL;