chrome/installer/util/callback_work_item.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 "chrome/installer/util/callback_work_item.h"
   6
   7 #include "base/callback.h"
   8 #include "base/logging.h"
   9 #include "chrome/installer/util/work_item.h"
  10
  11 CallbackWorkItem::CallbackWorkItem(
  12     base::Callback<bool(const CallbackWorkItem&)> callback)
  13     : callback_(callback),
  14       roll_state_(RS_UNDEFINED) {
  15 }
  16
  17 CallbackWorkItem::~CallbackWorkItem() {
  18 }
  19
  20 bool CallbackWorkItem::Do() {
  21   DCHECK_EQ(roll_state_, RS_UNDEFINED);
  22
  23   roll_state_ = RS_FORWARD;
  24   bool result = callback_.Run(*this);
  25   roll_state_ = RS_UNDEFINED;
  26
  27   return result;
  28 }
  29
  30 void CallbackWorkItem::Rollback() {
  31   DCHECK_EQ(roll_state_, RS_UNDEFINED);
  32
  33   roll_state_ = RS_BACKWARD;
  34   ignore_result(callback_.Run(*this));
  35   roll_state_ = RS_UNDEFINED;
  36 }
  37
  38 bool CallbackWorkItem::IsRollback() const {
  39   DCHECK_NE(roll_state_, RS_UNDEFINED);
  40   return roll_state_ == RS_BACKWARD;
  41 }