RequestContext: Add microbenchmarks

Summary: Add microbenchmarks for request context operations.

Reviewed By: LeeHowes

Differential Revision: D17434204

fbshipit-source-id: 22c804d71b922dd6894bdf6d98449f0c60c83206

folly/io/async/test/RequestContextHelper.h

+/*
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#pragma once
+
+#include <folly/io/async/Request.h>
+
+namespace folly {
+
+class TestData : public RequestData {
+ public:
+  explicit TestData(int data) : data_(data) {}
+  ~TestData() override {}
+
+  bool hasCallback() override {
+    return true;
+  }
+
+  void onSet() override {
+    set_++;
+  }
+
+  void onUnset() override {
+    unset_++;
+  }
+
+  int set_ = 0, unset_ = 0;
+  int data_;
+};
+
+} // namespace folly

folly/io/async/test/RequestContextTest.cpp

@@ -19,33 +19,13 @@
 #include <folly/Memory.h>
 #include <folly/io/async/EventBase.h>
 #include <folly/io/async/Request.h>
+#include <folly/io/async/test/RequestContextHelper.h>
 #include <folly/portability/GTest.h>
 
 using namespace folly;
 
 RequestToken testtoken("test");
 
-class TestData : public RequestData {
- public:
-  explicit TestData(int data) : data_(data) {}
-  ~TestData() override {}
-
-  bool hasCallback() override {
-    return true;
-  }
-
-  void onSet() override {
-    set_++;
-  }
-
-  void onUnset() override {
-    unset_++;
-  }
-
-  int set_ = 0, unset_ = 0;
-  int data_;
-};
-
 class RequestContextTest : public ::testing::Test {
  protected:
   void SetUp() override {