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// Copyright 2019 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef STORAGE_BROWSER_FILE_SYSTEM_MEMORY_FILE_STREAM_WRITER_H_
#define STORAGE_BROWSER_FILE_SYSTEM_MEMORY_FILE_STREAM_WRITER_H_
#include "base/component_export.h"
#include "base/files/file_path.h"
#include "base/functional/callback.h"
#include "base/memory/weak_ptr.h"
#include "storage/browser/file_system/file_stream_writer.h"
#include "storage/browser/file_system/obfuscated_file_util_memory_delegate.h"
namespace storage {
// This is a stream writer for in-memory files.
class COMPONENT_EXPORT(STORAGE_BROWSER) MemoryFileStreamWriter
: public FileStreamWriter {
public:
MemoryFileStreamWriter(
scoped_refptr<base::TaskRunner> task_runner,
base::WeakPtr<ObfuscatedFileUtilMemoryDelegate> memory_file_util,
const base::FilePath& file_path,
int64_t initial_offset);
MemoryFileStreamWriter(const MemoryFileStreamWriter&) = delete;
MemoryFileStreamWriter& operator=(const MemoryFileStreamWriter&) = delete;
~MemoryFileStreamWriter() override;
// FileStreamWriter overrides.
int Write(net::IOBuffer* buf,
int buf_len,
net::CompletionOnceCallback callback) override;
int Cancel(net::CompletionOnceCallback callback) override;
int Flush(FlushMode flush_mode,
net::CompletionOnceCallback callback) override;
private:
void OnWriteCompleted(net::CompletionOnceCallback callback, int result);
// Stops the in-flight operation and calls |cancel_callback_| if it has been
// set by Cancel() for the current operation.
bool CancelIfRequested();
base::WeakPtr<ObfuscatedFileUtilMemoryDelegate> memory_file_util_;
const scoped_refptr<base::TaskRunner> task_runner_;
const base::FilePath file_path_;
int64_t offset_;
bool has_pending_operation_;
net::CompletionOnceCallback cancel_callback_;
base::WeakPtrFactory<MemoryFileStreamWriter> weak_factory_{this};
};
} // namespace storage
#endif // STORAGE_BROWSER_FILE_SYSTEM_MEMORY_FILE_STREAM_WRITER_H_
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