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-rw-r--r--actionpack/lib/action_controller/lock.rb18
1 files changed, 18 insertions, 0 deletions
diff --git a/actionpack/lib/action_controller/lock.rb b/actionpack/lib/action_controller/lock.rb
new file mode 100644
index 0000000000..b4b0902f18
--- /dev/null
+++ b/actionpack/lib/action_controller/lock.rb
@@ -0,0 +1,18 @@
+module ActionController
+ class Lock
+ def initialize(app)
+ @app = app
+ @lock = Mutex.new
+ end
+
+ def call(env)
+ old_multithread = env["rack.multithread"]
+ env["rack.multithread"] = false
+ response = @lock.synchronize do
+ @app.call(env)
+ end
+ env["rack.multithread"] = old_multithread
+ response
+ end
+ end
+end