* ext/io/wait: imported.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@4124 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 23 insertions, 0 deletions

diff --git a/ext/io/wait/lib/nonblock.rb b/ext/io/wait/lib/nonblock.rb
new file mode 100644
index 0000000000..46511fb40c
--- /dev/null
+++ b/ext/io/wait/lib/nonblock.rb
@@ -0,0 +1,23 @@
+require "fcntl"
+class IO
+  def nonblock?
+    (fcntl(Fcntl::F_GETFL) & File::NONBLOCK) != 0
+  end
+
+  def nonblock=(nb)
+    f = fcntl(Fcntl::F_GETFL)
+    if nb
+      f |= File::NONBLOCK
+    else
+      f &= ~File::NONBLOCK
+    end
+    fcntl(Fcntl::F_SETFL, f)
+  end
+
+  def nonblock(nb = true)
+    nb, self.nonblock = nonblock?, nb
+    yield
+  ensure
+    self.nonblock = nb
+  end
+end