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Side by Side Diff: net/base/file_stream_win.h

Issue 10701050: net: Implement canceling of all async operations in FileStream. (Closed) Base URL: https://src.chromium.org/chrome/trunk/src/
Patch Set: Created 8 years, 3 months ago
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1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. 1 // Copyright (c) 2012 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 // This file implements FileStream for Windows. 5 // This file implements FileStream for Windows.
6 6
7 #ifndef NET_BASE_FILE_STREAM_WIN_H_ 7 #ifndef NET_BASE_FILE_STREAM_WIN_H_
8 #define NET_BASE_FILE_STREAM_WIN_H_ 8 #define NET_BASE_FILE_STREAM_WIN_H_
9 9
10 #include "base/memory/scoped_ptr.h" 10 #include "base/message_loop.h"
11 #include "base/memory/weak_ptr.h"
12 #include "base/platform_file.h" 11 #include "base/platform_file.h"
13 #include "base/synchronization/waitable_event.h"
14 #include "net/base/completion_callback.h" 12 #include "net/base/completion_callback.h"
13 #include "net/base/file_stream.h"
14 #include "net/base/file_stream_metrics.h"
15 #include "net/base/file_stream_whence.h" 15 #include "net/base/file_stream_whence.h"
16 #include "net/base/net_export.h" 16 #include "net/base/net_export.h"
17 #include "net/base/net_log.h" 17 #include "net/base/net_log.h"
18 18
19 class FilePath; 19 class FilePath;
20 20
21 namespace base {
22 class WaitableEvent;
23 }
24
25 namespace net { 21 namespace net {
26 22
27 class IOBuffer; 23 class IOBuffer;
28 24
29 class NET_EXPORT FileStreamWin { 25 class FileStream::Context : public MessageLoopForIO::IOHandler {
30 public: 26 public:
31 explicit FileStreamWin(net::NetLog* net_log); 27 explicit Context(const BoundNetLog& bound_net_log);
32 FileStreamWin(base::PlatformFile file, int flags, net::NetLog* net_log); 28 Context(base::PlatformFile file,
33 ~FileStreamWin(); 29 const BoundNetLog& bound_net_log,
willchan no longer on Chromium 2012/09/11 23:05:02 Indentation
30 int open_flags);
31 ~Context();
34 32
35 // FileStream implementations. 33 // Destroys the context. It can be deleted in the method or deletion can be
36 void Close(const CompletionCallback& callback); 34 // deferred to WorkerPool if some asynchronous operation is now in progress
35 // or if auto-closing is needed.
36 void Orphan();
37
38 bool record_uma() const { return record_uma_; }
39 void set_record_uma(bool value) { record_uma_ = value; }
40 base::PlatformFile file() const { return file_; }
41 bool async_in_progress() const { return async_in_progress_; }
42
43 // Sync and async versions of all operations
44 void OpenAsync(const FilePath& path,
45 int open_flags,
46 const CompletionCallback& callback);
47 int OpenSync(const FilePath& path, int open_flags);
48
49 void CloseAsync(const CompletionCallback& callback);
37 void CloseSync(); 50 void CloseSync();
38 int Open(const FilePath& path, int open_flags, 51
39 const CompletionCallback& callback); 52 void SeekAsync(Whence whence,
40 int OpenSync(const FilePath& path, int open_flags); 53 int64 offset,
41 bool IsOpen() const; 54 const Int64CompletionCallback& callback);
42 int Seek(Whence whence, int64 offset,
43 const Int64CompletionCallback& callback);
44 int64 SeekSync(Whence whence, int64 offset); 55 int64 SeekSync(Whence whence, int64 offset);
45 int64 Available(); 56
46 int Read(IOBuffer* buf, int buf_len, const CompletionCallback& callback); 57 int64 GetFileSize() const;
58
59 int ReadAsync(IOBuffer* buf,
60 int buf_len,
61 const CompletionCallback& callback);
47 int ReadSync(char* buf, int buf_len); 62 int ReadSync(char* buf, int buf_len);
48 int ReadUntilComplete(char *buf, int buf_len); 63
49 int Write(IOBuffer* buf, int buf_len, const CompletionCallback& callback); 64 int WriteAsync(IOBuffer* buf,
65 int buf_len,
66 const CompletionCallback& callback);
50 int WriteSync(const char* buf, int buf_len); 67 int WriteSync(const char* buf, int buf_len);
51 int64 Truncate(int64 bytes); 68
52 int Flush(); 69 int Flush();
53 void EnableErrorStatistics(); 70
54 void SetBoundNetLogSource(const net::BoundNetLog& owner_bound_net_log); 71 int Truncate(int64 bytes);
55 base::PlatformFile GetPlatformFileForTesting();
56 72
57 private: 73 private:
58 class AsyncContext; 74 enum {
75 kErrorBadFile = ERROR_INVALID_HANDLE
willchan no longer on Chromium 2012/09/11 23:05:02 There's a fun thread on chromium-dev about enum st
76 };
77
78 struct OpenResult {
79 base::PlatformFile file;
80 int error_code;
81 };
82
83 int GetLastErrno() { return GetLastError(); }
84
85 // Map system error into network error code and log it with |bound_net_log_|.
86 int RecordAndMapError(int error, FileErrorSource source) const;
87
88 void BeginOpenEvent(const FilePath& path);
89
90 // Opens a file.
91 OpenResult OpenFileImpl(const FilePath& path, int open_flags);
92
93 int ProcessOpenError(int error_code);
94
95 // Called when asynchronous Open() is completed.
96 void OnOpenCompleted(const CompletionCallback& callback, OpenResult result);
97
98 // Called after opening a file in async mode.
99 void OnAsyncFileOpened();
100
101 void OnCloseCompleted(const CompletionCallback& callback);
59 102
60 // A helper method for Seek. 103 // A helper method for Seek.
61 void SeekFile(Whence whence, int64 offset, int64* result); 104 int64 SeekFileImpl(Whence whence, int64 offset);
62 105
63 // Called when the file_ is opened asynchronously. |result| contains the 106 void IOCompletionIsPending(const CompletionCallback& callback, IOBuffer* buf);
64 // result as a network error code.
65 void OnOpened(const CompletionCallback& callback, int* result);
66 107
67 // Called when the file_ is closed asynchronously. 108 // Implementation of MessageLoopForIO::IOHandler
68 void OnClosed(const CompletionCallback& callback); 109 virtual void OnIOCompleted(MessageLoopForIO::IOContext* context,
110 DWORD bytes_read,
111 DWORD error) OVERRIDE;
69 112
70 // Called when the file_ is seeked asynchronously. 113 Int64CompletionCallback IntToInt64(const CompletionCallback& callback);
71 void OnSeeked(const Int64CompletionCallback& callback, int64* result);
72 114
73 // Resets on_io_complete_ and WeakPtr's. 115 // Checks for IO error that probably happened in SeekFileImpl().
74 // Called in OnOpened, OnClosed and OnSeeked. 116 // If there was error reports it.
75 void ResetOnIOComplete(); 117 void CheckForIOError(int64* result, FileErrorSource source);
76 118
77 // Waits until the in-flight async open/close operation is complete. 119 // Called when asynchronous Seek() is completed.
78 void WaitForIOCompletion(); 120 // Reports error if needed and calls callback.
121 void ProcessAsyncResult(const Int64CompletionCallback& callback,
122 FileErrorSource source,
123 int64 result);
79 124
80 // This member is used to support asynchronous reads. It is non-null when 125 // Called when asynchronous Open() or Seek()
81 // the FileStreamWin was opened with PLATFORM_FILE_ASYNC. 126 // is completed. |result| contains the result or a network error code.
82 scoped_ptr<AsyncContext> async_context_; 127 void OnAsyncCompleted(const Int64CompletionCallback& callback, int64 result);
83 128
129 MessageLoopForIO::IOContext io_context_;
130 CompletionCallback callback_;
131 scoped_refptr<IOBuffer> in_flight_buf_;
84 base::PlatformFile file_; 132 base::PlatformFile file_;
85 int open_flags_;
86 bool auto_closed_;
87 bool record_uma_; 133 bool record_uma_;
88 net::BoundNetLog bound_net_log_; 134 bool async_in_progress_;
89 base::WeakPtrFactory<FileStreamWin> weak_ptr_factory_; 135 bool orphaned_;
90 scoped_ptr<base::WaitableEvent> on_io_complete_; 136 BoundNetLog bound_net_log_;
137 FileErrorSource error_source_;
91 138
92 DISALLOW_COPY_AND_ASSIGN(FileStreamWin); 139 DISALLOW_COPY_AND_ASSIGN(Context);
93 }; 140 };
94 141
95 } // namespace net 142 } // namespace net
96 143
97 #endif // NET_BASE_FILE_STREAM_WIN_H_ 144 #endif // NET_BASE_FILE_STREAM_WIN_H_
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