Move ExecutionObserver to folly/executors

Summary:
The following targets were moved to folly/executors:
```
//folly/experimental:execution_observer
```

`arc f` was applied

This is a codemod. It was automatically generated and will be landed once it is approved and tests are passing in sandcastle.
You have been added as a reviewer by Sentinel or Butterfly.

p:ad_meeo.folly

Reviewed By: yfeldblum, Orvid

Differential Revision: D58028038

fbshipit-source-id: 0fd1dfb349421d61e9f49eb546b4c4cc0d0c0c19

folly/executors/BUCK

@@ -472,3 +472,15 @@ cpp_library(
         "glog",
     ],
 )
+
+cpp_library(
+    name = "execution_observer",
+    srcs = ["ExecutionObserver.cpp"],
+    headers = ["ExecutionObserver.h"],
+    deps = [
+        "//folly/tracing:static_tracepoint",
+    ],
+    exported_external_deps = [
+        "boost",
+    ],
+)

folly/experimental/ExecutionObserver.cpp → folly/executors/ExecutionObserver.cpp

@@ -14,7 +14,7 @@
  * limitations under the License.
  */
 
-#include <folly/experimental/ExecutionObserver.h>
+#include <folly/executors/ExecutionObserver.h>
 
 #include <folly/tracing/StaticTracepoint.h>
 

folly/executors/ExecutionObserver.h

@@ -0,0 +1,80 @@
+/*
+ * Copyright (c) Meta Platforms, Inc. and 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 <cstdint>
+
+#include <boost/intrusive/list.hpp>
+
+namespace folly {
+
+/**
+ * Observes the execution of a task. Multiple execution observers can be chained
+ * together. As a caveat, execution observers should not remove themselves from
+ * the list of observers during execution
+ */
+class ExecutionObserver
+    : public boost::intrusive::list_base_hook<
+          boost::intrusive::link_mode<boost::intrusive::auto_unlink>> {
+ public:
+  enum class CallbackType {
+    // Owned by EventBase.
+    Event,
+    Loop,
+    NotificationQueue,
+    // Owned by FiberManager.
+    Fiber,
+  };
+  // Constant time size = false to support auto_unlink behavior, options are
+  // mutually exclusive
+  typedef boost::intrusive::
+      list<ExecutionObserver, boost::intrusive::constant_time_size<false>>
+          List;
+
+  virtual ~ExecutionObserver() = default;
+
+  /**
+   * Called when a task is about to start executing.
+   *
+   * @param id Unique id for the task which is starting.
+   */
+  virtual void starting(uintptr_t id, CallbackType callbackType) noexcept = 0;
+
+  /**
+   * Called just after a task stops executing.
+   *
+   * @param id Unique id for the task which stopped.
+   */
+  virtual void stopped(uintptr_t id, CallbackType callbackType) noexcept = 0;
+};
+
+class ExecutionObserverScopeGuard {
+ public:
+  ExecutionObserverScopeGuard(
+      folly::ExecutionObserver::List* observerList,
+      void* id,
+      folly::ExecutionObserver::CallbackType callbackType);
+
+  ~ExecutionObserverScopeGuard();
+
+ private:
+  folly::ExecutionObserver::List* observerList_;
+  uintptr_t id_;
+  folly::ExecutionObserver::CallbackType callbackType_;
+};
+
+} // namespace folly

folly/experimental/BUCK

@@ -78,13 +78,11 @@ cpp_library(
 
 cpp_library(
     name = "execution_observer",
-    srcs = ["ExecutionObserver.cpp"],
-    headers = ["ExecutionObserver.h"],
-    deps = [
-        "//folly/tracing:static_tracepoint",
+    headers = [
+        "ExecutionObserver.h",
     ],
-    exported_external_deps = [
-        "boost",
+    exported_deps = [
+        "//folly/executors:execution_observer",
     ],
 )
 

folly/experimental/ExecutionObserver.h

@@ -14,67 +14,4 @@
  * limitations under the License.
  */
 
-#pragma once
-
-#include <cstdint>
-
-#include <boost/intrusive/list.hpp>
-
-namespace folly {
-
-/**
- * Observes the execution of a task. Multiple execution observers can be chained
- * together. As a caveat, execution observers should not remove themselves from
- * the list of observers during execution
- */
-class ExecutionObserver
-    : public boost::intrusive::list_base_hook<
-          boost::intrusive::link_mode<boost::intrusive::auto_unlink>> {
- public:
-  enum class CallbackType {
-    // Owned by EventBase.
-    Event,
-    Loop,
-    NotificationQueue,
-    // Owned by FiberManager.
-    Fiber,
-  };
-  // Constant time size = false to support auto_unlink behavior, options are
-  // mutually exclusive
-  typedef boost::intrusive::
-      list<ExecutionObserver, boost::intrusive::constant_time_size<false>>
-          List;
-
-  virtual ~ExecutionObserver() = default;
-
-  /**
-   * Called when a task is about to start executing.
-   *
-   * @param id Unique id for the task which is starting.
-   */
-  virtual void starting(uintptr_t id, CallbackType callbackType) noexcept = 0;
-
-  /**
-   * Called just after a task stops executing.
-   *
-   * @param id Unique id for the task which stopped.
-   */
-  virtual void stopped(uintptr_t id, CallbackType callbackType) noexcept = 0;
-};
-
-class ExecutionObserverScopeGuard {
- public:
-  ExecutionObserverScopeGuard(
-      folly::ExecutionObserver::List* observerList,
-      void* id,
-      folly::ExecutionObserver::CallbackType callbackType);
-
-  ~ExecutionObserverScopeGuard();
-
- private:
-  folly::ExecutionObserver::List* observerList_;
-  uintptr_t id_;
-  folly::ExecutionObserver::CallbackType callbackType_;
-};
-
-} // namespace folly
+#include <folly/executors/ExecutionObserver.h>

folly/somerge_defs.bzl

@@ -2,7 +2,7 @@
 
 Generated by xplat/cross_plat_devx/somerge_maps/compute_merge_maps.py
 
-@generated SignedSource<<da913e4f3d0f9047b2de7798a5bada9c>>
+@generated SignedSource<<e0f4993adba8f1578c6a7984d24a8d05>>
 """
 
 # Entry Points:
@@ -157,6 +157,7 @@ FOLLY_BASE_NATIVE_LIBRARY_MERGE_MAP = [
     "//xplat/folly/executors/thread_factory:thread_factoryAndroid",
     "//xplat/folly/executors:cpu_thread_pool_executorAndroid",
     "//xplat/folly/executors:drivable_executorAndroid",
+    "//xplat/folly/executors:execution_observerAndroid",
     "//xplat/folly/executors:executor_with_priorityAndroid",
     "//xplat/folly/executors:global_executorAndroid",
     "//xplat/folly/executors:global_thread_pool_listAndroid",