michael@0: // Copyright (c) 2012 The Chromium Authors. All rights reserved.
michael@0: // Use of this source code is governed by a BSD-style license that can be
michael@0: // found in the LICENSE file.
michael@0: 
michael@0: #include "base/callback_internal.h"
michael@0: 
michael@0: #include "base/logging.h"
michael@0: 
michael@0: namespace base {
michael@0: namespace internal {
michael@0: 
michael@0: bool CallbackBase::is_null() const {
michael@0:   return bind_state_.get() == NULL;
michael@0: }
michael@0: 
michael@0: void CallbackBase::Reset() {
michael@0:   polymorphic_invoke_ = NULL;
michael@0:   // NULL the bind_state_ last, since it may be holding the last ref to whatever
michael@0:   // object owns us, and we may be deleted after that.
michael@0:   bind_state_ = NULL;
michael@0: }
michael@0: 
michael@0: bool CallbackBase::Equals(const CallbackBase& other) const {
michael@0:   return bind_state_.get() == other.bind_state_.get() &&
michael@0:          polymorphic_invoke_ == other.polymorphic_invoke_;
michael@0: }
michael@0: 
michael@0: CallbackBase::CallbackBase(BindStateBase* bind_state)
michael@0:     : bind_state_(bind_state),
michael@0:       polymorphic_invoke_(NULL) {
michael@0:   DCHECK(!bind_state_.get() || bind_state_->HasOneRef());
michael@0: }
michael@0: 
michael@0: CallbackBase::~CallbackBase() {
michael@0: }
michael@0: 
michael@0: }  // namespace internal
michael@0: }  // namespace base