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Diffstat (limited to 'net/disk_cache/file.h')
-rw-r--r-- | net/disk_cache/file.h | 100 |
1 files changed, 0 insertions, 100 deletions
diff --git a/net/disk_cache/file.h b/net/disk_cache/file.h deleted file mode 100644 index 190f7cb..0000000 --- a/net/disk_cache/file.h +++ /dev/null @@ -1,100 +0,0 @@ -// 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. - -// See net/disk_cache/disk_cache.h for the public interface of the cache. - -#ifndef NET_DISK_CACHE_FILE_H_ -#define NET_DISK_CACHE_FILE_H_ - -#include "base/memory/ref_counted.h" -#include "base/platform_file.h" -#include "net/base/net_export.h" - -namespace base { -class FilePath; -} - -namespace disk_cache { - -// This interface is used to support asynchronous ReadData and WriteData calls. -class FileIOCallback { - public: - // Notified of the actual number of bytes read or written. This value is - // negative if an error occurred. - virtual void OnFileIOComplete(int bytes_copied) = 0; - - protected: - virtual ~FileIOCallback() {} -}; - -// Simple wrapper around a file that allows asynchronous operations. -class NET_EXPORT_PRIVATE File : public base::RefCounted<File> { - friend class base::RefCounted<File>; - public: - File(); - // mixed_mode set to true enables regular synchronous operations for the file. - explicit File(bool mixed_mode); - - // Initializes the object to use the passed in file instead of opening it with - // the Init() call. No asynchronous operations can be performed with this - // object. - explicit File(base::PlatformFile file); - - // Initializes the object to point to a given file. The file must aready exist - // on disk, and allow shared read and write. - bool Init(const base::FilePath& name); - - // Returns the handle or file descriptor. - base::PlatformFile platform_file() const; - - // Returns true if the file was opened properly. - bool IsValid() const; - - // Performs synchronous IO. - bool Read(void* buffer, size_t buffer_len, size_t offset); - bool Write(const void* buffer, size_t buffer_len, size_t offset); - - // Performs asynchronous IO. callback will be called when the IO completes, - // as an APC on the thread that queued the operation. - bool Read(void* buffer, size_t buffer_len, size_t offset, - FileIOCallback* callback, bool* completed); - bool Write(const void* buffer, size_t buffer_len, size_t offset, - FileIOCallback* callback, bool* completed); - - // Sets the file's length. The file is truncated or extended with zeros to - // the new length. - bool SetLength(size_t length); - size_t GetLength(); - - // Blocks until |num_pending_io| IO operations complete. - static void WaitForPendingIO(int* num_pending_io); - - // Drops current pending operations without waiting for them to complete. - static void DropPendingIO(); - - protected: - virtual ~File(); - - private: - // Performs the actual asynchronous write. If notify is set and there is no - // callback, the call will be re-synchronized. - bool AsyncWrite(const void* buffer, size_t buffer_len, size_t offset, - FileIOCallback* callback, bool* completed); - - // Infrastructure for async IO. - int DoRead(void* buffer, size_t buffer_len, size_t offset); - int DoWrite(const void* buffer, size_t buffer_len, size_t offset); - void OnOperationComplete(FileIOCallback* callback, int result); - - bool init_; - bool mixed_; - base::PlatformFile platform_file_; // Regular, asynchronous IO handle. - base::PlatformFile sync_platform_file_; // Synchronous IO handle. - - DISALLOW_COPY_AND_ASSIGN(File); -}; - -} // namespace disk_cache - -#endif // NET_DISK_CACHE_FILE_H_ |