mirrors/cpython
0
0
Fork 0
mirror of https://github.com/python/cpython.git synced 2024-11-24 10:24:35 +08:00
Code Issues Packages Projects Releases Wiki Activity

On Windows, put the select file descriptor arrays on the heap.

Browse Source 
This is because they are huge and the stack is limited on Windows.
Other platforms keep declaring it on the stack.
This commit is contained in:
Guido van Rossum 1998-07-02 02:53:36 +00:00
parent 030eb11823
commit d20781b518
1 changed files with 22 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

22
Modules/selectmodule.c
View File

@ -215,9 +215,14 @@ select_select(self, args)
PyObject *self;
PyObject *args;
{
#ifdef MS_WINDOWS
/* This would be an awful lot of stack space on Windows! */
pylist *rfd2obj, *wfd2obj, *efd2obj;
#else
pylist rfd2obj[FD_SETSIZE + 3];
pylist wfd2obj[FD_SETSIZE + 3];
pylist efd2obj[FD_SETSIZE + 3];
#endif
PyObject *ifdlist, *ofdlist, *efdlist;
PyObject *ret = NULL;
PyObject *tout = Py_None;
@ -258,6 +263,18 @@ select_select(self, args)
return NULL;
}
#ifdef MS_WINDOWS
/* Allocate memory for the lists */
rfd2obj = PyMem_NEW(pylist, FD_SETSIZE + 3);
wfd2obj = PyMem_NEW(pylist, FD_SETSIZE + 3);
efd2obj = PyMem_NEW(pylist, FD_SETSIZE + 3);
if (rfd2obj == NULL || wfd2obj == NULL || efd2obj == NULL) {
PyMem_XDEL(rfd2obj);
PyMem_XDEL(wfd2obj);
PyMem_XDEL(efd2obj);
return NULL;
}
#endif
/* Convert lists to fd_sets, and get maximum fd number
* propagates the Python exception set in list2set()
*/
@ -311,6 +328,11 @@ select_select(self, args)
reap_obj(rfd2obj);
reap_obj(wfd2obj);
reap_obj(efd2obj);
#ifdef MS_WINDOWS
PyMem_DEL(rfd2obj);
PyMem_DEL(wfd2obj);
PyMem_DEL(efd2obj);
#endif
return ret;
}