1 files changed, 61 insertions, 0 deletions
diff --git a/chromium/mojo/public/cpp/utility/lib/thread_local.h b/chromium/mojo/public/cpp/utility/lib/thread_local.h
new file mode 100644
index 00000000000..4c3625d00d8
--- /dev/null
+++ b/chromium/mojo/public/cpp/utility/lib/thread_local.h
@@ -0,0 +1,61 @@
+// Copyright 2014 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef MOJO_PUBLIC_CPP_UTILITY_LIB_THREAD_LOCAL_H_
+#define MOJO_PUBLIC_CPP_UTILITY_LIB_THREAD_LOCAL_H_
+
+#ifndef _WIN32
+#include <pthread.h>
+#endif
+
+#include "mojo/public/cpp/system/macros.h"
+
+namespace mojo {
+namespace internal {
+
+// Helper functions that abstract the cross-platform APIs.
+struct ThreadLocalPlatform {
+#ifdef _WIN32
+  typedef unsigned long SlotType;
+#else
+  typedef pthread_key_t SlotType;
+#endif
+
+  static void AllocateSlot(SlotType* slot);
+  static void FreeSlot(SlotType slot);
+  static void* GetValueFromSlot(SlotType slot);
+  static void SetValueInSlot(SlotType slot, void* value);
+};
+
+// This class is intended to be statically allocated.
+template <typename P>
+class ThreadLocalPointer {
+ public:
+  ThreadLocalPointer() : slot_() {
+  }
+
+  void Allocate() {
+    ThreadLocalPlatform::AllocateSlot(&slot_);
+  }
+
+  void Free() {
+    ThreadLocalPlatform::FreeSlot(slot_);
+  }
+
+  P* Get() {
+    return static_cast<P*>(ThreadLocalPlatform::GetValueFromSlot(slot_));
+  }
+
+  void Set(P* value) {
+    ThreadLocalPlatform::SetValueInSlot(slot_, value);
+  }
+
+ private:
+  ThreadLocalPlatform::SlotType slot_;
+};
+
+}  // namespace internal
+}  // namespace mojo
+
+#endif  // MOJO_PUBLIC_CPP_UTILITY_LIB_THREAD_LOCAL_H_