1 files changed, 49 insertions, 0 deletions
diff --git a/webkit/blob/deletable_file_reference.h b/webkit/blob/deletable_file_reference.h
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+++ b/webkit/blob/deletable_file_reference.h
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+// 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 WEBKIT_BLOB_DELETABLE_FILE_REFERENCE_H_
+#define WEBKIT_BLOB_DELETABLE_FILE_REFERENCE_H_
+#pragma once
+
+#include "base/file_path.h"
+#include "base/ref_counted.h"
+
+namespace base {
+class MessageLoopProxy;
+}
+
+namespace webkit_blob {
+
+// A refcounted wrapper around a FilePath that schedules the file
+// to be deleted upon final release.
+class DeletableFileReference : public base::RefCounted<DeletableFileReference> {
+ public:
+  // Returns a DeletableFileReference for the given path, if no reference
+  // for this path exists returns NULL.
+  static scoped_refptr<DeletableFileReference> Get(const FilePath& path);
+
+  // Returns a DeletableFileReference for the given path, creating a new
+  // reference if none yet exists.
+  static scoped_refptr<DeletableFileReference> GetOrCreate(
+      const FilePath& path, base::MessageLoopProxy* file_thread);
+
+  // The full file path.
+  const FilePath& path() const { return path_; }
+
+ private:
+  friend class base::RefCounted<DeletableFileReference>;
+
+  DeletableFileReference(
+      const FilePath& path, base::MessageLoopProxy* file_thread);
+  ~DeletableFileReference();
+
+  const FilePath path_;
+  scoped_refptr<base::MessageLoopProxy> file_thread_;
+
+  DISALLOW_COPY_AND_ASSIGN(DeletableFileReference);
+};
+
+}  // namespace webkit_blob
+
+#endif  // BASE_DELETABLE_FILE_REFERENCE_H_