epoll: better deal with cross thread close

Probably not an issue under Linux

1 files changed, 4 insertions, 2 deletions

diff --git a/ext/sleepy_penguin/epoll.c b/ext/sleepy_penguin/epoll.c
index 9a37ef8..f71b658 100644
--- a/ext/sleepy_penguin/epoll.c
+++ b/ext/sleepy_penguin/epoll.c
@@ -520,10 +520,12 @@ static VALUE epclose(VALUE self)
                 } else if (ep->fd == -1) {
                         rb_raise(rb_eIOError, "closed");
                 } else {
-                        int e = close(ep->fd);
+                        int err;
+                        int fd = ep->fd;
 
                         ep->fd = -1;
-                        if (e == -1)
+                        err = close(fd);
+                        if (err == -1)
                                 rb_sys_fail("close");
                 }
         } else {