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// Copyright (c) 2012 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.
// This file implements FileStream for Windows.
#ifndef NET_BASE_FILE_STREAM_WIN_H_
#define NET_BASE_FILE_STREAM_WIN_H_
#include "base/memory/scoped_ptr.h"
#include "base/memory/weak_ptr.h"
#include "base/platform_file.h"
#include "base/synchronization/waitable_event.h"
#include "net/base/completion_callback.h"
#include "net/base/file_stream_whence.h"
#include "net/base/net_export.h"
#include "net/base/net_log.h"
class FilePath;
namespace base {
class WaitableEvent;
}
namespace net {
class IOBuffer;
class NET_EXPORT FileStreamWin {
public:
explicit FileStreamWin(net::NetLog* net_log);
FileStreamWin(base::PlatformFile file, int flags, net::NetLog* net_log);
~FileStreamWin();
// FileStream implementations.
void Close(const CompletionCallback& callback);
void CloseSync();
int Open(const FilePath& path, int open_flags,
const CompletionCallback& callback);
int OpenSync(const FilePath& path, int open_flags);
bool IsOpen() const;
int Seek(Whence whence, int64 offset,
const Int64CompletionCallback& callback);
int64 SeekSync(Whence whence, int64 offset);
int64 Available();
int Read(IOBuffer* buf, int buf_len, const CompletionCallback& callback);
int ReadSync(char* buf, int buf_len);
int ReadUntilComplete(char *buf, int buf_len);
int Write(IOBuffer* buf, int buf_len, const CompletionCallback& callback);
int WriteSync(const char* buf, int buf_len);
int64 Truncate(int64 bytes);
int Flush(const CompletionCallback& callback);
int FlushSync();
void EnableErrorStatistics();
void SetBoundNetLogSource(const net::BoundNetLog& owner_bound_net_log);
base::PlatformFile GetPlatformFileForTesting();
private:
class AsyncContext;
// A helper method for Seek.
void SeekFile(Whence whence, int64 offset, int64* result);
// A helper method for Flush.
void FlushFile(int* result);
// Called when the file_ is opened asynchronously. |result| contains the
// result as a network error code.
void OnOpened(const CompletionCallback& callback, int* result);
// Called when the file_ is closed asynchronously.
void OnClosed(const CompletionCallback& callback);
// Called when the file_ is seeked asynchronously.
void OnSeeked(const Int64CompletionCallback& callback, int64* result);
// Called when the file_ is flushed asynchronously.
void OnFlushed(const CompletionCallback& callback, int* result);
// Resets on_io_complete_ and WeakPtr's.
// Called in OnOpened, OnClosed and OnSeeked.
void ResetOnIOComplete();
// Waits until the in-flight async open/close operation is complete.
void WaitForIOCompletion();
// This member is used to support asynchronous reads. It is non-null when
// the FileStreamWin was opened with PLATFORM_FILE_ASYNC.
scoped_ptr<AsyncContext> async_context_;
base::PlatformFile file_;
int open_flags_;
bool auto_closed_;
bool record_uma_;
net::BoundNetLog bound_net_log_;
base::WeakPtrFactory<FileStreamWin> weak_ptr_factory_;
scoped_ptr<base::WaitableEvent> on_io_complete_;
DISALLOW_COPY_AND_ASSIGN(FileStreamWin);
};
} // namespace net
#endif // NET_BASE_FILE_STREAM_WIN_H_
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