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1 // Copyright (c) 2011 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2011 The Chromium Authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #include "base/files/file_path_watcher.h" | 5 #include "base/files/file_path_watcher.h" |
6 | 6 |
7 #include "base/bind.h" | 7 #include "base/bind.h" |
8 #include "base/files/file.h" | 8 #include "base/files/file.h" |
9 #include "base/files/file_path.h" | 9 #include "base/files/file_path.h" |
10 #include "base/files/file_util.h" | 10 #include "base/files/file_util.h" |
11 #include "base/logging.h" | 11 #include "base/logging.h" |
12 #include "base/memory/ref_counted.h" | 12 #include "base/memory/ref_counted.h" |
13 #include "base/message_loop/message_loop_proxy.h" | 13 #include "base/message_loop/message_loop_proxy.h" |
14 #include "base/profiler/scoped_profile.h" | 14 #include "base/profiler/scoped_tracker.h" |
15 #include "base/time/time.h" | 15 #include "base/time/time.h" |
16 #include "base/win/object_watcher.h" | 16 #include "base/win/object_watcher.h" |
17 | 17 |
18 namespace base { | 18 namespace base { |
19 | 19 |
20 namespace { | 20 namespace { |
21 | 21 |
22 class FilePathWatcherImpl : public FilePathWatcher::PlatformDelegate, | 22 class FilePathWatcherImpl : public FilePathWatcher::PlatformDelegate, |
23 public base::win::ObjectWatcher::Delegate, | 23 public base::win::ObjectWatcher::Delegate, |
24 public MessageLoop::DestructionObserver { | 24 public MessageLoop::DestructionObserver { |
25 public: | 25 public: |
26 FilePathWatcherImpl() | 26 FilePathWatcherImpl() |
27 : handle_(INVALID_HANDLE_VALUE), | 27 : handle_(INVALID_HANDLE_VALUE), |
28 recursive_watch_(false) {} | 28 recursive_watch_(false) {} |
29 | 29 |
30 // FilePathWatcher::PlatformDelegate overrides. | 30 // FilePathWatcher::PlatformDelegate overrides. |
31 virtual bool Watch(const FilePath& path, | 31 virtual bool Watch(const FilePath& path, |
32 bool recursive, | 32 bool recursive, |
33 const FilePathWatcher::Callback& callback) override; | 33 const FilePathWatcher::Callback& callback) override; |
34 virtual void Cancel() override; | 34 virtual void Cancel() override; |
35 | 35 |
36 // Deletion of the FilePathWatcher will call Cancel() to dispose of this | 36 // Deletion of the FilePathWatcher will call Cancel() to dispose of this |
37 // object in the right thread. This also observes destruction of the required | 37 // object in the right thread. This also observes destruction of the required |
38 // cleanup thread, in case it quits before Cancel() is called. | 38 // cleanup thread, in case it quits before Cancel() is called. |
39 virtual void WillDestroyCurrentMessageLoop() override; | 39 virtual void WillDestroyCurrentMessageLoop() override; |
40 | 40 |
41 // Callback from MessageLoopForIO. | 41 // Callback from MessageLoopForIO. |
42 virtual void OnObjectSignaled(HANDLE object); | 42 virtual void OnObjectSignaled(HANDLE object) override; |
43 | 43 |
44 private: | 44 private: |
45 virtual ~FilePathWatcherImpl() {} | 45 virtual ~FilePathWatcherImpl() {} |
46 | 46 |
47 // Setup a watch handle for directory |dir|. Set |recursive| to true to watch | 47 // Setup a watch handle for directory |dir|. Set |recursive| to true to watch |
48 // the directory sub trees. Returns true if no fatal error occurs. |handle| | 48 // the directory sub trees. Returns true if no fatal error occurs. |handle| |
49 // will receive the handle value if |dir| is watchable, otherwise | 49 // will receive the handle value if |dir| is watchable, otherwise |
50 // INVALID_HANDLE_VALUE. | 50 // INVALID_HANDLE_VALUE. |
51 static bool SetupWatchHandle(const FilePath& dir, | 51 static bool SetupWatchHandle(const FilePath& dir, |
52 bool recursive, | 52 bool recursive, |
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140 MessageLoop::current()->RemoveDestructionObserver(this); | 140 MessageLoop::current()->RemoveDestructionObserver(this); |
141 callback_.Reset(); | 141 callback_.Reset(); |
142 } | 142 } |
143 } | 143 } |
144 | 144 |
145 void FilePathWatcherImpl::WillDestroyCurrentMessageLoop() { | 145 void FilePathWatcherImpl::WillDestroyCurrentMessageLoop() { |
146 CancelOnMessageLoopThread(); | 146 CancelOnMessageLoopThread(); |
147 } | 147 } |
148 | 148 |
149 void FilePathWatcherImpl::OnObjectSignaled(HANDLE object) { | 149 void FilePathWatcherImpl::OnObjectSignaled(HANDLE object) { |
150 // TODO(vadimt): Remove ScopedProfile below once crbug.com/418183 is fixed. | 150 // TODO(vadimt): Remove ScopedTracker below once crbug.com/418183 is fixed. |
151 tracked_objects::ScopedProfile tracking_profile( | 151 tracked_objects::ScopedTracker tracking_profile( |
152 FROM_HERE_WITH_EXPLICIT_FUNCTION( | 152 FROM_HERE_WITH_EXPLICIT_FUNCTION("FilePathWatcherImpl_OnObjectSignaled")); |
153 "FilePathWatcherImpl_OnObjectSignaled")); | |
154 | 153 |
155 DCHECK(object == handle_); | 154 DCHECK(object == handle_); |
156 // Make sure we stay alive through the body of this function. | 155 // Make sure we stay alive through the body of this function. |
157 scoped_refptr<FilePathWatcherImpl> keep_alive(this); | 156 scoped_refptr<FilePathWatcherImpl> keep_alive(this); |
158 | 157 |
159 if (!UpdateWatch()) { | 158 if (!UpdateWatch()) { |
160 callback_.Run(target_, true /* error */); | 159 callback_.Run(target_, true /* error */); |
161 return; | 160 return; |
162 } | 161 } |
163 | 162 |
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298 handle_ = INVALID_HANDLE_VALUE; | 297 handle_ = INVALID_HANDLE_VALUE; |
299 } | 298 } |
300 | 299 |
301 } // namespace | 300 } // namespace |
302 | 301 |
303 FilePathWatcher::FilePathWatcher() { | 302 FilePathWatcher::FilePathWatcher() { |
304 impl_ = new FilePathWatcherImpl(); | 303 impl_ = new FilePathWatcherImpl(); |
305 } | 304 } |
306 | 305 |
307 } // namespace base | 306 } // namespace base |
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