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
58
59
60
61
62
63
64
65
66
67
68
69
|
// Copyright 2013 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CHROME_BROWSER_SYNC_TEST_INTEGRATION_STATUS_CHANGE_CHECKER_H_
#define CHROME_BROWSER_SYNC_TEST_INTEGRATION_STATUS_CHANGE_CHECKER_H_
#include <string>
#include "base/time/time.h"
// Interface for a helper class that can pump the message loop while waiting
// for a certain state transition to take place.
//
// This is a template that should be filled in by child classes so they can
// observe specific kinds of changes and await specific conditions.
//
// The instances of this class are intended to be single-use. It doesn't make
// sense to call StartBlockingWait() more than once.
class StatusChangeChecker {
public:
StatusChangeChecker();
// Returns a string representing this current StatusChangeChecker, and
// possibly some small part of its state. For example: "AwaitPassphraseError"
// or "AwaitMigrationDone(BOOKMARKS)".
virtual std::string GetDebugMessage() const = 0;
// Returns whether the state the checker is currently in is its desired
// configuration.
virtual bool IsExitConditionSatisfied() = 0;
// Block if IsExitConditionSatisfied() is currently false until TimedOut()
// becomes true. Checkers should call CheckExitCondition upon changes, which
// can cause Wait() to immediately return true if IsExitConditionSatisfied(),
// and continue to block if not. Returns false if and only if timeout occurs.
virtual bool Wait();
// Returns true if the blocking wait was exited because of a timeout.
bool TimedOut() const;
protected:
virtual ~StatusChangeChecker();
// Timeout length when blocking.
virtual base::TimeDelta GetTimeoutDuration();
// Helper function to start running the nested message loop.
//
// Will exit if IsExitConditionSatisfied() returns true when called from
// CheckExitCondition(), if a timeout occurs, or if StopWaiting() is called.
//
// The timeout length is specified with GetTimeoutDuration().
void StartBlockingWait();
// Stop the nested running of the message loop started in StartBlockingWait().
void StopWaiting();
// Checks IsExitConditionSatisfied() and calls StopWaiting() if it returns
// true.
void CheckExitCondition();
// Called when the blocking wait timeout is exceeded.
void OnTimeout();
bool timed_out_;
};
#endif // CHROME_BROWSER_SYNC_TEST_INTEGRATION_STATUS_CHANGE_CHECKER_H_
|
