1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
|
// Copyright 2012 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CHROME_INSTALLER_UTIL_CALLBACK_WORK_ITEM_H_
#define CHROME_INSTALLER_UTIL_CALLBACK_WORK_ITEM_H_
#include "base/functional/callback.h"
#include "base/gtest_prod_util.h"
#include "chrome/installer/util/work_item.h"
// A work item that invokes a callback on Do() and Rollback(). In the following
// example, the function SomeWorkItemCallback() will be invoked when an item
// list is processed.
//
// // A callback invoked to do some work.
// bool SomeWorkItemCallback(const CallbackWorkItem& item) {
// // Roll forward work goes here. The return value indicates success/failure
// // of the item.
// return true;
// }
//
// // A callback invoked to roll it back.
// void SomeWorkItemRollbackCallback(const CallbackWorkItem& item) {
// // Rollback work goes here.
// }
//
// void SomeFunctionThatAddsItemsToAList(WorkItemList* item_list) {
// ...
// item_list->AddCallbackWorkItem(
// base::BindOnce(&SomeWorkItemCallback),
// base::BindOnce(&SomeWorkItemRollbackCallback));
// ...
// }
class CallbackWorkItem : public WorkItem {
public:
~CallbackWorkItem() override;
private:
friend class WorkItem;
CallbackWorkItem(
base::OnceCallback<bool(const CallbackWorkItem&)> do_action,
base::OnceCallback<void(const CallbackWorkItem&)> rollback_action);
// WorkItem:
bool DoImpl() override;
void RollbackImpl() override;
base::OnceCallback<bool(const CallbackWorkItem&)> do_action_;
base::OnceCallback<void(const CallbackWorkItem&)> rollback_action_;
FRIEND_TEST_ALL_PREFIXES(CallbackWorkItemTest, TestFailure);
FRIEND_TEST_ALL_PREFIXES(CallbackWorkItemTest, TestForwardBackward);
};
#endif // CHROME_INSTALLER_UTIL_CALLBACK_WORK_ITEM_H_
|
