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Side by Side Diff: net/disk_cache/file.h

Issue 3167020: Disk cache: Extend the internal buffering performed by each entry... (Closed) Base URL: svn://chrome-svn/chrome/trunk/src/
Patch Set: '' Created 10 years, 4 months ago
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1 // Copyright (c) 2006-2008 The Chromium Authors. All rights reserved. 1 // Copyright (c) 2006-2008 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 // See net/disk_cache/disk_cache.h for the public interface of the cache. 5 // See net/disk_cache/disk_cache.h for the public interface of the cache.
6 6
7 #ifndef NET_DISK_CACHE_FILE_H_ 7 #ifndef NET_DISK_CACHE_FILE_H_
8 #define NET_DISK_CACHE_FILE_H_ 8 #define NET_DISK_CACHE_FILE_H_
9 #pragma once 9 #pragma once
10 10
(...skipping 43 matching lines...) Expand 10 before | Expand all | Expand 10 after
54 bool Read(void* buffer, size_t buffer_len, size_t offset); 54 bool Read(void* buffer, size_t buffer_len, size_t offset);
55 bool Write(const void* buffer, size_t buffer_len, size_t offset); 55 bool Write(const void* buffer, size_t buffer_len, size_t offset);
56 56
57 // Performs asynchronous IO. callback will be called when the IO completes, 57 // Performs asynchronous IO. callback will be called when the IO completes,
58 // as an APC on the thread that queued the operation. 58 // as an APC on the thread that queued the operation.
59 bool Read(void* buffer, size_t buffer_len, size_t offset, 59 bool Read(void* buffer, size_t buffer_len, size_t offset,
60 FileIOCallback* callback, bool* completed); 60 FileIOCallback* callback, bool* completed);
61 bool Write(const void* buffer, size_t buffer_len, size_t offset, 61 bool Write(const void* buffer, size_t buffer_len, size_t offset,
62 FileIOCallback* callback, bool* completed); 62 FileIOCallback* callback, bool* completed);
63 63
64 // Performs asynchronous writes, but doesn't notify when done. Automatically
65 // deletes buffer when done.
66 bool PostWrite(const void* buffer, size_t buffer_len, size_t offset);
67
68 // Sets the file's length. The file is truncated or extended with zeros to 64 // Sets the file's length. The file is truncated or extended with zeros to
69 // the new length. 65 // the new length.
70 bool SetLength(size_t length); 66 bool SetLength(size_t length);
71 size_t GetLength(); 67 size_t GetLength();
72 68
73 // Blocks until |num_pending_io| IO operations complete. 69 // Blocks until |num_pending_io| IO operations complete.
74 static void WaitForPendingIO(int* num_pending_io); 70 static void WaitForPendingIO(int* num_pending_io);
75 71
76 protected: 72 protected:
77 virtual ~File(); 73 virtual ~File();
78 74
79 // Performs the actual asynchronous write. If notify is set and there is no 75 // Performs the actual asynchronous write. If notify is set and there is no
80 // callback, the call will be re-synchronized. 76 // callback, the call will be re-synchronized.
81 bool AsyncWrite(const void* buffer, size_t buffer_len, size_t offset, 77 bool AsyncWrite(const void* buffer, size_t buffer_len, size_t offset,
82 bool notify, FileIOCallback* callback, bool* completed); 78 FileIOCallback* callback, bool* completed);
83 79
84 private: 80 private:
85 bool init_; 81 bool init_;
86 bool mixed_; 82 bool mixed_;
87 base::PlatformFile platform_file_; // Regular, asynchronous IO handle. 83 base::PlatformFile platform_file_; // Regular, asynchronous IO handle.
88 base::PlatformFile sync_platform_file_; // Synchronous IO handle. 84 base::PlatformFile sync_platform_file_; // Synchronous IO handle.
89 85
90 DISALLOW_COPY_AND_ASSIGN(File); 86 DISALLOW_COPY_AND_ASSIGN(File);
91 }; 87 };
92 88
93 } // namespace disk_cache 89 } // namespace disk_cache
94 90
95 #endif // NET_DISK_CACHE_FILE_H_ 91 #endif // NET_DISK_CACHE_FILE_H_
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