avoid useless fcntl in rb_io_set_nonblock.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@10180 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
2006-05-22 22:12:57 +00:00 · 2006-05-22 22:12:57 +00:00 · 078a760999
commit 078a760999
parent dc3037bc48
1 changed files with 5 additions and 3 deletions
--- a/io.c
+++ b/io.c
@ -1247,10 +1247,12 @@ void rb_io_set_nonblock(OpenFile *fptr)
 #else
    flags = 0;
 #endif
+    if ((flags & O_NONBLOCK) == 0) {
        flags |= O_NONBLOCK;
        if (fcntl(fptr->fd, F_SETFL, flags) == -1) {
            rb_sys_fail(fptr->path);
        }
+    }
 }

 static VALUE