blob: 5f826ce236498303a1078ccecaaa4b7020fb4e82 (
plain)
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
70
71
72
|
// Copyright (c) 2006-2008 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 NET_BASE_DIRECTORY_LISTER_H__
#define NET_BASE_DIRECTORY_LISTER_H__
#include <windows.h>
#include <string>
#include "base/ref_counted.h"
class MessageLoop;
namespace net {
//
// This class provides an API for listing the contents of a directory on the
// filesystem asynchronously. It spawns a background thread, and enumerates
// the specified directory on that thread. It marshalls WIN32_FIND_DATA
// structs over to the main application thread. The consumer of this class
// is insulated from any of the multi-threading details.
//
class DirectoryLister : public base::RefCountedThreadSafe<DirectoryLister> {
public:
// Implement this class to receive directory entries.
class Delegate {
public:
virtual void OnListFile(const WIN32_FIND_DATA& data) = 0;
virtual void OnListDone(int error) = 0;
};
DirectoryLister(const std::wstring& dir, Delegate* delegate);
~DirectoryLister();
// Call this method to start the directory enumeration thread.
bool Start();
// Call this method to asynchronously stop directory enumeration. The
// delegate will receive the OnListDone notification with an error code of
// ERROR_OPERATION_ABORTED.
void Cancel();
// The delegate pointer may be modified at any time.
Delegate* delegate() const { return delegate_; }
void set_delegate(Delegate* d) { delegate_ = d; }
// Returns the directory being enumerated.
const std::wstring& directory() const { return dir_; }
// Returns true if the directory enumeration was canceled.
bool was_canceled() const { return canceled_; }
private:
friend class DirectoryDataEvent;
void OnReceivedData(const WIN32_FIND_DATA* data, int count);
void OnDone(int error);
static unsigned __stdcall ThreadFunc(void* param);
std::wstring dir_;
Delegate* delegate_;
MessageLoop* message_loop_;
HANDLE thread_;
bool canceled_;
};
} // namespace net
#endif // NET_BASE_DIRECTORY_LISTER_H__
|
