Mojo: AsyncWaiter and mojo/public/environment

mojo/environment/buffer_tls_impl.cc

+// 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.
+
+#include "mojo/environment/buffer_tls_impl.h"
+
+#include "base/lazy_instance.h"
+#include "base/threading/thread_local.h"
+
+namespace mojo {
+namespace internal {
+namespace {
+
+base::LazyInstance<base::ThreadLocalPointer<Buffer> >::Leaky lazy_tls_ptr =
+    LAZY_INSTANCE_INITIALIZER;
+
+}  // namespace
+
+Buffer* GetCurrentBufferImpl() {
+  return lazy_tls_ptr.Pointer()->Get();
+}
+
+Buffer* SetCurrentBufferImpl(Buffer* buf) {
+  Buffer* old_buf = lazy_tls_ptr.Pointer()->Get();
+  lazy_tls_ptr.Pointer()->Set(buf);
+  return old_buf;
+}
+
+}  // namespace internal
+}  // namespace mojo