Implement chromium's TLS.

base/threading/thread_local_storage_posix.cc

 // Copyright (c) 2012 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 {
 
-ThreadLocalStorage::Slot::Slot(TLSDestructorFunc destructor) {
-  initialized_ = false;
-  key_ = 0;
-  Initialize(destructor);
+namespace internal {
+
+bool PlatformThreadLocalStorage::AllocTLS(TLSKey* key) {
+  return !pthread_key_create(key, OnThreadExit);
 }
 
-bool ThreadLocalStorage::StaticSlot::Initialize(TLSDestructorFunc destructor) {
-  DCHECK(!initialized_);
-  int error = pthread_key_create(&key_, destructor);
-  if (error) {
-    NOTREACHED();
-    return false;
-  }
-
-  initialized_ = true;
-  return true;
+void PlatformThreadLocalStorage::FreeTLS(TLSKey key) {
+  DCHECK_EQ(pthread_key_delete(key), 0);
 }
 
-void ThreadLocalStorage::StaticSlot::Free() {
-  DCHECK(initialized_);
-  int error = pthread_key_delete(key_);
-  if (error)
-    NOTREACHED();
-  initialized_ = false;
+void* PlatformThreadLocalStorage::GetTLSValue(TLSKey key) {
+  return pthread_getspecific(key);
 }
 
-void* ThreadLocalStorage::StaticSlot::Get() const {
-  DCHECK(initialized_);
-  return pthread_getspecific(key_);
+void PlatformThreadLocalStorage::SetTLSValue(TLSKey key, void* value) {
+  DCHECK_EQ(pthread_setspecific(key, value), 0);
 }
 
-void ThreadLocalStorage::StaticSlot::Set(void* value) {
-  DCHECK(initialized_);
-  int error = pthread_setspecific(key_, value);
-  if (error)
-    NOTREACHED();
-}
+}  // namespace internal
 
 }  // namespace base