| // 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/callback_internal.h" |
| |
| #include "base/logging.h" |
| |
| namespace base { |
| namespace internal { |
| |
| void BindStateBase::AddRef() { |
| ++ref_count_; |
| } |
| |
| void BindStateBase::Release() { |
| if (--ref_count_ == 0) |
| destructor_(this); |
| } |
| |
| CallbackBase<CopyMode::MoveOnly>::CallbackBase(CallbackBase&& c) |
| : bind_state_(std::move(c.bind_state_)), |
| polymorphic_invoke_(c.polymorphic_invoke_) { |
| c.polymorphic_invoke_ = nullptr; |
| } |
| |
| CallbackBase<CopyMode::MoveOnly>& |
| CallbackBase<CopyMode::MoveOnly>::operator=(CallbackBase&& c) { |
| bind_state_ = std::move(c.bind_state_); |
| polymorphic_invoke_ = c.polymorphic_invoke_; |
| c.polymorphic_invoke_ = nullptr; |
| return *this; |
| } |
| |
| void CallbackBase<CopyMode::MoveOnly>::Reset() { |
| polymorphic_invoke_ = nullptr; |
| // NULL the bind_state_ last, since it may be holding the last ref to whatever |
| // object owns us, and we may be deleted after that. |
| bind_state_ = nullptr; |
| } |
| |
| bool CallbackBase<CopyMode::MoveOnly>::EqualsInternal( |
| const CallbackBase& other) const { |
| return bind_state_.get() == other.bind_state_.get() && |
| polymorphic_invoke_ == other.polymorphic_invoke_; |
| } |
| |
| CallbackBase<CopyMode::MoveOnly>::CallbackBase( |
| BindStateBase* bind_state) |
| : bind_state_(bind_state) { |
| DCHECK(!bind_state_.get() || bind_state_->ref_count_ == 1); |
| } |
| |
| CallbackBase<CopyMode::MoveOnly>::~CallbackBase() {} |
| |
| CallbackBase<CopyMode::Copyable>::CallbackBase( |
| const CallbackBase& c) |
| : CallbackBase<CopyMode::MoveOnly>(nullptr) { |
| bind_state_ = c.bind_state_; |
| polymorphic_invoke_ = c.polymorphic_invoke_; |
| } |
| |
| CallbackBase<CopyMode::Copyable>::CallbackBase(CallbackBase&& c) |
| : CallbackBase<CopyMode::MoveOnly>(std::move(c)) {} |
| |
| CallbackBase<CopyMode::Copyable>& |
| CallbackBase<CopyMode::Copyable>::operator=(const CallbackBase& c) { |
| bind_state_ = c.bind_state_; |
| polymorphic_invoke_ = c.polymorphic_invoke_; |
| return *this; |
| } |
| |
| CallbackBase<CopyMode::Copyable>& |
| CallbackBase<CopyMode::Copyable>::operator=(CallbackBase&& c) { |
| *static_cast<CallbackBase<CopyMode::MoveOnly>*>(this) = std::move(c); |
| return *this; |
| } |
| |
| template class CallbackBase<CopyMode::MoveOnly>; |
| template class CallbackBase<CopyMode::Copyable>; |
| |
| } // namespace internal |
| } // namespace base |