Introduce Py_SOCKET_FD_CAN_BE_GE_FD_SETSIZE.
Proposed by Tim Peters.
diff --git a/Modules/_ssl.c b/Modules/_ssl.c
index 6448cb0..0e79b54 100644
--- a/Modules/_ssl.c
+++ b/Modules/_ssl.c
@@ -377,8 +377,10 @@
return SOCKET_HAS_BEEN_CLOSED;
/* Guard against socket too large for select*/
+#ifndef Py_SOCKET_FD_CAN_BE_GE_FD_SETSIZE
if (s->sock_fd >= FD_SETSIZE)
return SOCKET_INVALID;
+#endif
/* Construct the arguments to select */
tv.tv_sec = (int)s->sock_timeout;
diff --git a/Modules/socketmodule.c b/Modules/socketmodule.c
index 1ec3166..a445581 100644
--- a/Modules/socketmodule.c
+++ b/Modules/socketmodule.c
@@ -396,7 +396,14 @@
static PyTypeObject sock_type;
/* Can we call select() with this socket without a buffer overrun? */
+#ifdef Py_SOCKET_FD_CAN_BE_GE_FD_SETSIZE
+/* Platform can select file descriptors beyond FD_SETSIZE */
+#define IS_SELECTABLE(s) 1
+#else
+/* POSIX says selecting file descriptors beyond FD_SETSIZE
+ has undefined behaviour. */
#define IS_SELECTABLE(s) ((s)->sock_fd < FD_SETSIZE)
+#endif
static PyObject*
select_error(void)
diff --git a/PC/pyconfig.h b/PC/pyconfig.h
index 33777dc..bb16cfb 100644
--- a/PC/pyconfig.h
+++ b/PC/pyconfig.h
@@ -572,4 +572,9 @@
/* Define if you have the thread library (-lthread). */
/* #undef HAVE_LIBTHREAD */
+
+/* WinSock does not use a bitmask in select, and uses
+ socket handles greater than FD_SETSIZE */
+#define Py_SOCKET_FD_CAN_BE_GE_FD_SETSIZE
+
#endif /* !Py_CONFIG_H */