[PATCH] D51674: [clangd] Fix async index loading (from r341376).

[Sam McCall via Phabricator via llvm-commits]

This revision was automatically updated to reflect the committed changes.
Closed by commit rL341797: [clangd] Fix async index loading (from r341376). (authored by sammccall, committed by ).
Herald added a subscriber: llvm-commits.

Changed prior to commit:
  https://reviews.llvm.org/D51674?vs=164012&id=164638#toc

Repository:
  rL LLVM

https://reviews.llvm.org/D51674

Files:
  clang-tools-extra/trunk/clangd/tool/ClangdMain.cpp


Index: clang-tools-extra/trunk/clangd/tool/ClangdMain.cpp
===================================================================
--- clang-tools-extra/trunk/clangd/tool/ClangdMain.cpp
+++ clang-tools-extra/trunk/clangd/tool/ClangdMain.cpp
@@ -270,14 +270,17 @@
     Opts.ResourceDir = ResourceDir;
   Opts.BuildDynamicSymbolIndex = EnableIndex;
   std::unique_ptr<SymbolIndex> StaticIdx;
+  std::future<void> AsyncIndexLoad; // Block exit while loading the index.
   if (EnableIndex && !YamlSymbolFile.empty()) {
     // Load the index asynchronously. Meanwhile SwapIndex returns no results.
     SwapIndex *Placeholder;
     StaticIdx.reset(Placeholder = new SwapIndex(llvm::make_unique<MemIndex>()));
-    runAsync<void>([Placeholder, &Opts] {
+    AsyncIndexLoad = runAsync<void>([Placeholder, &Opts] {
       if (auto Idx = loadIndex(YamlSymbolFile, Opts.URISchemes, UseDex))
         Placeholder->reset(std::move(Idx));
     });
+    if (RunSynchronously)
+      AsyncIndexLoad.wait();
   }
   Opts.StaticIndex = StaticIdx.get();
   Opts.AsyncThreadsCount = WorkerThreadsCount;


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