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 bool CallbackBase::is_null() const {
  13   return bind_state_.get() == NULL;
  14 }
  15
  16 void CallbackBase::Reset() {
  17   polymorphic_invoke_ = NULL;
  18   // NULL the bind_state_ last, since it may be holding the last ref to whatever
  19   // object owns us, and we may be deleted after that.
  20   bind_state_ = NULL;
  21 }
  22
  23 bool CallbackBase::Equals(const CallbackBase& other) const {
  24   return bind_state_.get() == other.bind_state_.get() &&
  25          polymorphic_invoke_ == other.polymorphic_invoke_;
  26 }
  27
  28 CallbackBase::CallbackBase(BindStateBase* bind_state)
  29     : bind_state_(bind_state),
  30       polymorphic_invoke_(NULL) {
  31   DCHECK(!bind_state_ || bind_state_->HasOneRef());
  32 }
  33
  34 CallbackBase::~CallbackBase() {
  35 }
  36
  37 }  // namespace internal
  38 }  // namespace base