[clangd] Move threading helper to more appropriate header. NFC

llvm-svn: 370864

Author: sam-mccall

clang-tools-extra/clangd/CodeComplete.cpp

@@ -31,7 +31,7 @@
 #include "Protocol.h"
 #include "Quality.h"
 #include "SourceCode.h"
-#include "TUScheduler.h"
+#include "Threading.h"
 #include "Trace.h"
 #include "URI.h"
 #include "index/Index.h"

clang-tools-extra/clangd/TUScheduler.h

@@ -20,7 +20,6 @@
 #include "llvm/ADT/STLExtras.h"
 #include "llvm/ADT/StringMap.h"
 #include "llvm/ADT/StringRef.h"
-#include <future>
 
 namespace clang {
 namespace clangd {
@@ -259,19 +258,6 @@ class TUScheduler {
   std::chrono::steady_clock::duration UpdateDebounce;
 };
 
-/// Runs \p Action asynchronously with a new std::thread. The context will be
-/// propagated.
-template <typename T>
-std::future<T> runAsync(llvm::unique_function<T()> Action) {
-  return std::async(
-      std::launch::async,
-      [](llvm::unique_function<T()> &&Action, Context Ctx) {
-        WithContext WithCtx(std::move(Ctx));
-        return Action();
-      },
-      std::move(Action), Context::current().clone());
-}
-
 } // namespace clangd
 } // namespace clang
 

clang-tools-extra/clangd/Threading.h

@@ -14,6 +14,7 @@
 #include "llvm/ADT/Twine.h"
 #include <cassert>
 #include <condition_variable>
+#include <future>
 #include <memory>
 #include <mutex>
 #include <thread>
@@ -117,6 +118,19 @@ class AsyncTaskRunner {
   std::size_t InFlightTasks = 0;
 };
 
+/// Runs \p Action asynchronously with a new std::thread. The context will be
+/// propagated.
+template <typename T>
+std::future<T> runAsync(llvm::unique_function<T()> Action) {
+  return std::async(
+      std::launch::async,
+      [](llvm::unique_function<T()> &&Action, Context Ctx) {
+        WithContext WithCtx(std::move(Ctx));
+        return Action();
+      },
+      std::move(Action), Context::current().clone());
+}
+
 } // namespace clangd
 } // namespace clang
 #endif