Add base::ThreadLocalStorage

base/threading/thread_local_storage_posix.cc

Index: base/threading/thread_local_storage_posix.cc
diff --git a/base/threading/thread_local_storage_posix.cc b/base/threading/thread_local_storage_posix.cc
new file mode 100644
index 0000000000000000000000000000000000000000..d5aa33f896a8569b36e3fc047de0a3038c929a31
--- /dev/null
+++ b/base/threading/thread_local_storage_posix.cc
@@ -0,0 +1,32 @@
+// Copyright 2008 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 "base/threading/thread_local_storage.h"
+
+#include "base/logging.h"
+
+namespace base {
+namespace internal {
+
+bool PlatformThreadLocalStorage::AllocTLS(TLSKey* key) {
+  return !pthread_key_create(key,
+      base::internal::PlatformThreadLocalStorage::OnThreadExit);
+}
+
+void PlatformThreadLocalStorage::FreeTLS(TLSKey key) {
+  int ret = pthread_key_delete(key);
+  DCHECK_EQ(ret, 0);
+}
+
+void* PlatformThreadLocalStorage::GetTLSValue(TLSKey key) {
+  return pthread_getspecific(key);
+}
+
+void PlatformThreadLocalStorage::SetTLSValue(TLSKey key, void* value) {
+  int ret = pthread_setspecific(key, value);
+  DCHECK_EQ(ret, 0);
+}
+
+}  // namespace internal
+}  // namespace base