Asynchronously open the temp file used for Pepper StreamToFile, and delete th...

chrome/browser/file_system_proxy.h

+// Copyright (c) 2010 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.
+
+#ifndef CHROME_BROWSER_FILE_SYSTEM_PROXY_H_
+#define CHROME_BROWSER_FILE_SYSTEM_PROXY_H_
+
+#include "base/callback.h"
+#include "base/platform_file.h"
+#include "base/ref_counted.h"
+
+// This class provides asynchronous access to common file routines.
+class FileSystemProxy {
+ public:
+  // This callback is used by methods that report success with a bool.  It is
+  // valid to pass NULL as the callback parameter to any function that takes a
+  // StatusCallback, in which case the operation will complete silently.
+  typedef Callback1<bool /* succeeded */>::Type StatusCallback;
+
+  // Creates or opens a file with the given flags.  It is invalid to pass NULL
+  // for the callback.
+  typedef Callback2<base::PassPlatformFile, bool /* created */>::Type
+      CreateOrOpenCallback;
+  static void CreateOrOpen(const FilePath& file_path,
+                           int file_flags,
+                           CreateOrOpenCallback* callback);
+
+  // Creates a temporary file for writing.  The path and an open file handle
+  // are returned.  It is invalid to pass NULL for the callback.
+  typedef Callback2<base::PassPlatformFile, FilePath>::Type
+      CreateTemporaryCallback;
+  static void CreateTemporary(CreateTemporaryCallback* callback);
+
+  // Close the given file handle.
+  static void Close(base::PlatformFile, StatusCallback* callback);
+
+  // Deletes a file or empty directory.
+  static void Delete(const FilePath& file_path,
+                     StatusCallback* callback);
+
+  // Deletes a directory and all of its contents.
+  static void RecursiveDelete(const FilePath& file_path,
+                              StatusCallback* callback);
+
+ private:
+  DISALLOW_IMPLICIT_CONSTRUCTORS(FileSystemProxy);
+};
+
+#endif  // CHROME_BROWSER_FILE_SYSTEM_PROXY_H_