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authornobu <nobu@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>2003-07-23 09:26:53 +0000
committernobu <nobu@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>2003-07-23 09:26:53 +0000
commiteb5a52e0706c7321eaf04f1c3240618532db8ca3 (patch)
treec7535f1c700e1b070efa8bd26e7a2b1146bd6722 /ext/io/wait/lib/nonblock.rb
parent2436525ed8cd7b95a3a98173afd23804fedf6676 (diff)
* ext/io/wait: imported.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@4124 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
Diffstat (limited to 'ext/io/wait/lib/nonblock.rb')
-rw-r--r--ext/io/wait/lib/nonblock.rb23
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 0000000..46511fb
--- /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