base/callback_internal.cc

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "base/callback_internal.h"
   6
   7 #include "base/logging.h"
   8
   9 namespace base {
  10 namespace internal {
  11
  12 CallbackBase::CallbackBase(const CallbackBase& c) = default;
  13 CallbackBase& CallbackBase::operator=(const CallbackBase& c) = default;
  14
  15 void CallbackBase::Reset() {
  16   polymorphic_invoke_ = NULL;
  17   // NULL the bind_state_ last, since it may be holding the last ref to whatever
  18   // object owns us, and we may be deleted after that.
  19   bind_state_ = NULL;
  20 }
  21
  22 bool CallbackBase::Equals(const CallbackBase& other) const {
  23   return bind_state_.get() == other.bind_state_.get() &&
  24          polymorphic_invoke_ == other.polymorphic_invoke_;
  25 }
  26
  27 CallbackBase::CallbackBase(BindStateBase* bind_state)
  28     : bind_state_(bind_state),
  29       polymorphic_invoke_(NULL) {
  30   DCHECK(!bind_state_.get() || bind_state_->HasOneRef());
  31 }
  32
  33 CallbackBase::~CallbackBase() {
  34 }
  35
  36 }  // namespace internal
  37 }  // namespace base