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// Copyright (c) 2011 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 <vector>
#include "base/callback.h"
#include "base/file_path.h"
#include "base/memory/ref_counted.h"
#include "webkit/blob/blob_export.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 BLOB_EXPORT DeletableFileReference :
public base::RefCounted<DeletableFileReference> {
public:
typedef base::Callback<void(const FilePath&)> DeletionCallback;
// 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_; }
void AddDeletionCallback(const DeletionCallback& callback);
private:
friend class base::RefCounted<DeletableFileReference>;
DeletableFileReference(
const FilePath& path, base::MessageLoopProxy* file_thread);
~DeletableFileReference();
const FilePath path_;
scoped_refptr<base::MessageLoopProxy> file_thread_;
std::vector<DeletionCallback> deletion_callbacks_;
DISALLOW_COPY_AND_ASSIGN(DeletableFileReference);
};
} // namespace webkit_blob
#endif // BASE_DELETABLE_FILE_REFERENCE_H_
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