From 2624da2e5ed0e1edbbb902c717031dd2ffa9a36a Mon Sep 17 00:00:00 2001
From: akr <akr@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
Date: Mon, 22 May 2006 22:12:57 +0000
Subject: avoid useless fcntl in rb_io_set_nonblock.

git-svn-id: http://svn.ruby-lang.org/repos/ruby/branches/ruby_1_8@10180 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
---
 io.c | 16 ++++++++++------
 1 file changed, 10 insertions(+), 6 deletions(-)

(limited to 'io.c')

diff --git a/io.c b/io.c
index 228149df8..8fc095758 100644
--- a/io.c
+++ b/io.c
@@ -1196,9 +1196,11 @@ void rb_io_set_nonblock(OpenFile *fptr)
 #else
     flags = 0;
 #endif
-    flags |= O_NONBLOCK;
-    if (fcntl(fileno(fptr->f), F_SETFL, flags) == -1) {
-        rb_sys_fail(fptr->path);
+    if ((flags & O_NONBLOCK) == 0) {
+        flags |= O_NONBLOCK;
+        if (fcntl(fileno(fptr->f), F_SETFL, flags) == -1) {
+            rb_sys_fail(fptr->path);
+        }
     }
     if (fptr->f2) {
 #ifdef F_GETFL
@@ -1209,9 +1211,11 @@ void rb_io_set_nonblock(OpenFile *fptr)
 #else
         flags = 0;
 #endif
-        flags |= O_NONBLOCK;
-        if (fcntl(fileno(fptr->f2), F_SETFL, flags) == -1) {
-            rb_sys_fail(fptr->path);
+        if ((flags & O_NONBLOCK) == 0) {
+            flags |= O_NONBLOCK;
+            if (fcntl(fileno(fptr->f2), F_SETFL, flags) == -1) {
+                rb_sys_fail(fptr->path);
+            }
         }
     }
 }
-- 
cgit