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// Copyright 2015 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.
#include <map>
#include "base/callback.h"
#include "base/files/file.h"
#include "base/memory/ref_counted_delete_on_message_loop.h"
#include "base/memory/ref_counted_memory.h"
namespace content {
namespace devtools {
class DevToolsIOContext {
public:
class Stream : public base::RefCountedDeleteOnMessageLoop<Stream> {
public:
enum Status {
StatusSuccess,
StatusEOF,
StatusFailure
};
using ReadCallback = base::Callback<
void(const scoped_refptr<base::RefCountedString>& data, int status)>;
void Read(off_t position, size_t max_size, ReadCallback callback);
void Append(const scoped_refptr<base::RefCountedString>& data);
const std::string& handle() const { return handle_; }
private:
Stream();
~Stream();
friend class DevToolsIOContext;
friend class base::RefCountedDeleteOnMessageLoop<Stream>;
friend class base::DeleteHelper<Stream>;
void ReadOnFileThread(off_t pos, size_t max_size, ReadCallback callback);
void AppendOnFileThread(const scoped_refptr<base::RefCountedString>& data);
bool InitOnFileThreadIfNeeded();
const std::string handle_;
base::File file_;
bool had_errors_;
off_t last_read_pos_;
};
DevToolsIOContext();
~DevToolsIOContext();
scoped_refptr<Stream> CreateTempFileBackedStream();
scoped_refptr<Stream> GetByHandle(const std::string& handle);
bool Close(const std::string& handle);
void DiscardAllStreams();
private:
using StreamsMap = std::map<std::string, scoped_refptr<Stream>>;
StreamsMap streams_;
};
} // namespace devtools
} // namespace content
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