Move webrtc/{base => rtc_base}

webrtc/base/weak_ptr.cc

-/*
- *  Copyright 2016 The WebRTC Project Authors. All rights reserved.
- *
- *  Use of this source code is governed by a BSD-style license
- *  that can be found in the LICENSE file in the root of the source
- *  tree. An additional intellectual property rights grant can be found
- *  in the file PATENTS.  All contributing project authors may
- *  be found in the AUTHORS file in the root of the source tree.
- */
-
-#include "webrtc/base/weak_ptr.h"
-
-// The implementation is borrowed from chromium except that it does not
-// implement SupportsWeakPtr.
-
-namespace rtc {
-namespace internal {
-
-WeakReference::Flag::Flag() : is_valid_(true) {
-  // Flags only become bound when checked for validity, or invalidated,
-  // so that we can check that later validity/invalidation operations on
-  // the same Flag take place on the same sequence.
-  checker_.Detach();
-}
-
-void WeakReference::Flag::Invalidate() {
-  RTC_DCHECK(checker_.CalledSequentially())
-      << "WeakPtrs must be invalidated on the same sequence.";
-  is_valid_ = false;
-}
-
-bool WeakReference::Flag::IsValid() const {
-  RTC_DCHECK(checker_.CalledSequentially())
-      << "WeakPtrs must be checked on the same sequence.";
-  return is_valid_;
-}
-
-WeakReference::Flag::~Flag() {}
-
-WeakReference::WeakReference() {}
-
-WeakReference::WeakReference(const Flag* flag) : flag_(flag) {}
-
-WeakReference::~WeakReference() {}
-
-WeakReference::WeakReference(WeakReference&& other) = default;
-
-WeakReference::WeakReference(const WeakReference& other) = default;
-
-bool WeakReference::is_valid() const {
-  return flag_.get() && flag_->IsValid();
-}
-
-WeakReferenceOwner::WeakReferenceOwner() {
-  checker_.Detach();
-}
-
-WeakReferenceOwner::~WeakReferenceOwner() {
-  RTC_DCHECK(checker_.CalledSequentially());
-  Invalidate();
-}
-
-WeakReference WeakReferenceOwner::GetRef() const {
-  RTC_DCHECK(checker_.CalledSequentially());
-  // If we hold the last reference to the Flag then create a new one.
-  if (!HasRefs())
-    flag_ = new RefCountedObject<WeakReference::Flag>();
-
-  return WeakReference(flag_.get());
-}
-
-void WeakReferenceOwner::Invalidate() {
-  RTC_DCHECK(checker_.CalledSequentially());
-  if (flag_.get()) {
-    flag_->Invalidate();
-    flag_ = nullptr;
-  }
-}
-
-WeakPtrBase::WeakPtrBase() {}
-
-WeakPtrBase::~WeakPtrBase() {}
-
-WeakPtrBase::WeakPtrBase(const WeakReference& ref) : ref_(ref) {}
-
-}  // namespace internal
-}  // namespace rtc