Revert 241657 "Implement chromium's TLS."

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