blob: 69d8d074699d3bc63b56ff3af1ad11f7525e55cb (
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
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
|
// Copyright (c) 2012 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.
#include "chrome/browser/media_galleries/fileapi/mtp_device_map_service.h"
#include <string>
#include <utility>
#include "base/stl_util.h"
#include "chrome/browser/media_galleries/fileapi/mtp_device_async_delegate.h"
#include "content/public/browser/browser_thread.h"
#include "webkit/browser/fileapi/isolated_context.h"
namespace {
base::LazyInstance<MTPDeviceMapService> g_mtp_device_map_service =
LAZY_INSTANCE_INITIALIZER;
} // namespace
// static
MTPDeviceMapService* MTPDeviceMapService::GetInstance() {
return g_mtp_device_map_service.Pointer();
}
void MTPDeviceMapService::RegisterMTPFileSystem(
const base::FilePath::StringType& device_location,
const std::string& fsid) {
DCHECK(content::BrowserThread::CurrentlyOn(content::BrowserThread::IO));
if (!ContainsKey(mtp_device_usage_map_, device_location)) {
// Note that this initializes the delegate asynchronously, but since
// the delegate will only be used from the IO thread, it is guaranteed
// to be created before use of it expects it to be there.
CreateMTPDeviceAsyncDelegate(device_location,
base::Bind(&MTPDeviceMapService::AddAsyncDelegate,
base::Unretained(this), device_location));
mtp_device_usage_map_[device_location] = 0;
}
mtp_device_usage_map_[device_location]++;
mtp_device_map_[fsid] = device_location;
}
void MTPDeviceMapService::RevokeMTPFileSystem(const std::string& fsid) {
DCHECK(content::BrowserThread::CurrentlyOn(content::BrowserThread::IO));
MTPDeviceFileSystemMap::iterator it = mtp_device_map_.find(fsid);
if (it != mtp_device_map_.end()) {
base::FilePath::StringType device_location = it->second;
mtp_device_map_.erase(it);
MTPDeviceUsageMap::iterator delegate_it =
mtp_device_usage_map_.find(device_location);
DCHECK(delegate_it != mtp_device_usage_map_.end());
mtp_device_usage_map_[device_location]--;
if (mtp_device_usage_map_[device_location] == 0) {
mtp_device_usage_map_.erase(delegate_it);
RemoveAsyncDelegate(device_location);
}
}
}
void MTPDeviceMapService::AddAsyncDelegate(
const base::FilePath::StringType& device_location,
MTPDeviceAsyncDelegate* delegate) {
DCHECK(content::BrowserThread::CurrentlyOn(content::BrowserThread::IO));
DCHECK(delegate);
DCHECK(!device_location.empty());
if (ContainsKey(async_delegate_map_, device_location))
return;
async_delegate_map_[device_location] = delegate;
}
void MTPDeviceMapService::RemoveAsyncDelegate(
const base::FilePath::StringType& device_location) {
DCHECK(content::BrowserThread::CurrentlyOn(content::BrowserThread::IO));
AsyncDelegateMap::iterator it = async_delegate_map_.find(device_location);
DCHECK(it != async_delegate_map_.end());
it->second->CancelPendingTasksAndDeleteDelegate();
async_delegate_map_.erase(it);
}
MTPDeviceAsyncDelegate* MTPDeviceMapService::GetMTPDeviceAsyncDelegate(
const std::string& filesystem_id) {
DCHECK(content::BrowserThread::CurrentlyOn(content::BrowserThread::IO));
base::FilePath device_path;
if (!fileapi::IsolatedContext::GetInstance()->GetRegisteredPath(
filesystem_id, &device_path)) {
return NULL;
}
const base::FilePath::StringType& device_location = device_path.value();
DCHECK(!device_location.empty());
AsyncDelegateMap::const_iterator it =
async_delegate_map_.find(device_location);
return (it != async_delegate_map_.end()) ? it->second : NULL;
}
MTPDeviceMapService::MTPDeviceMapService() {
}
MTPDeviceMapService::~MTPDeviceMapService() {
DCHECK(mtp_device_usage_map_.empty());
}
|
