outline ThreadEntry::LocalLifetime

Summary: These functions are cold so there is no need for them to be inline. Differential Revision: D60009883 fbshipit-source-id: 03b09ffd77d0523f0d250a68d7f9b9c40c4f1b84
facebook · Jul 21, 2024 · 00d802c · 00d802c
1 parent 7b493b4
commit 00d802c
Show file tree

Hide file tree

Showing 2 changed files with 35 additions and 23 deletions.
diff --git a/folly/detail/ThreadLocalDetail.cpp b/folly/detail/ThreadLocalDetail.cpp
@@ -31,6 +31,36 @@ constexpr auto kBigGrowthFactor = 1.7;
 namespace folly {
 namespace threadlocal_detail {
 
+struct ThreadEntry::LocalSet {
+  using Map = std::unordered_map<LocalLifetime const*, LocalCache*>;
+  Synchronized<Map> tracking;
+};
+
+FOLLY_NOINLINE ThreadEntry::LocalSet* ThreadEntry::newLocalSet() {
+  return new ThreadEntry::LocalSet();
+}
+
+FOLLY_NOINLINE ThreadEntry::LocalLifetime::LocalLifetime(
+    LocalSet& set, LocalCache& cache) noexcept
+    : caches{set} {
+  DCHECK(!cache.poison);
+  auto tracking = caches.tracking.wlock();
+  auto inserted = tracking->emplace(this, &cache).second;
+  DCHECK(inserted);
+}
+
+FOLLY_NOINLINE ThreadEntry::LocalLifetime::~LocalLifetime() {
+  auto tracking = caches.tracking.wlock();
+  auto it = tracking->find(this);
+  DCHECK(it != tracking->end());
+  DCHECK(it->second);
+  auto& cache = *it->second;
+  tracking->erase(it);
+  DCHECK(!cache.poison);
+  cache = {};
+  cache.poison = true;
+}
+
 bool ThreadEntrySet::basicSanity() const {
   return //
       threadEntries.size() == entryToVectorSlot.size() &&

diff --git a/folly/detail/ThreadLocalDetail.h b/folly/detail/ThreadLocalDetail.h
@@ -173,31 +173,13 @@ struct ThreadEntry {
 
   struct LocalLifetime;
 
-  struct LocalSet {
-    using Map = std::unordered_map<LocalLifetime const*, LocalCache*>;
-    Synchronized<Map> tracking;
-  };
+  struct LocalSet;
+  static LocalSet* newLocalSet();
 
   struct LocalLifetime {
     LocalSet& caches;
-    explicit LocalLifetime(LocalSet& set, LocalCache& cache) noexcept
-        : caches{set} {
-      DCHECK(!cache.poison);
-      auto tracking = caches.tracking.wlock();
-      auto inserted = tracking->emplace(this, &cache).second;
-      DCHECK(inserted);
-    }
-    ~LocalLifetime() {
-      auto tracking = caches.tracking.wlock();
-      auto it = tracking->find(this);
-      DCHECK(it != tracking->end());
-      DCHECK(it->second);
-      auto& cache = *it->second;
-      tracking->erase(it);
-      DCHECK(!cache.poison);
-      cache = {};
-      cache.poison = true;
-    }
+    explicit LocalLifetime(LocalSet& set, LocalCache& cache) noexcept;
+    ~LocalLifetime();
   };
 
   ElementWrapper* elements{nullptr};
@@ -775,7 +757,7 @@ struct FOLLY_EXPORT StaticMeta final : StaticMetaBase {
       int ret = pthread_setspecific(key, threadEntry);
       checkPosixError(ret, "pthread_setspecific failed");
 
-      threadEntry->caches = new ThreadEntry::LocalSet();
+      threadEntry->caches = ThreadEntry::newLocalSet();
     }
     return threadEntry;
   }