matz

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@1070 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 5 insertions, 0 deletions

diff --git a/win32/win32.c b/win32/win32.c
index 22f3af9ed9..bd07bb644e 100644
--- a/win32/win32.c
+++ b/win32/win32.c
@@ -1974,6 +1974,11 @@ myselect (int nfds, fd_set *rd, fd_set *wr, fd_set *ex,
     if (!NtSocketsInitialized++) {
 	StartSockets();
     }
+    r = 0;
+    if (rd && rd->fd_count > r) r = rd->fd_count;
+    if (wr && wr->fd_count > r) r = wr->fd_count;
+    if (ex && ex->fd_count > r) r = ex->fd_count;
+    if (nfds > r) nfds = r;
     if (nfds == 0 && timeout) {
 	Sleep(timeout->tv_sec * 1000 + timeout->tv_usec / 1000);
 	return 0;