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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.
#include "net/base/file_stream.h"
#include <utility>
#include "base/profiler/scoped_tracker.h"
#include "net/base/file_stream_context.h"
#include "net/base/net_errors.h"
namespace net {
FileStream::FileStream(const scoped_refptr<base::TaskRunner>& task_runner)
: context_(new Context(task_runner)) {
}
FileStream::FileStream(base::File file,
const scoped_refptr<base::TaskRunner>& task_runner)
: context_(new Context(std::move(file), task_runner)) {}
FileStream::~FileStream() {
context_.release()->Orphan();
}
int FileStream::Open(const base::FilePath& path, int open_flags,
const CompletionCallback& callback) {
if (IsOpen()) {
DLOG(FATAL) << "File is already open!";
return ERR_UNEXPECTED;
}
DCHECK(open_flags & base::File::FLAG_ASYNC);
context_->Open(path, open_flags, callback);
return ERR_IO_PENDING;
}
int FileStream::Close(const CompletionCallback& callback) {
context_->Close(callback);
return ERR_IO_PENDING;
}
bool FileStream::IsOpen() const {
return context_->IsOpen();
}
int FileStream::Seek(int64_t offset, const Int64CompletionCallback& callback) {
if (!IsOpen())
return ERR_UNEXPECTED;
context_->Seek(offset, callback);
return ERR_IO_PENDING;
}
int FileStream::Read(IOBuffer* buf,
int buf_len,
const CompletionCallback& callback) {
// TODO(rvargas): Remove ScopedTracker below once crbug.com/475751 is fixed.
tracked_objects::ScopedTracker tracking_profile(
FROM_HERE_WITH_EXPLICIT_FUNCTION("475751 FileStream::Read"));
if (!IsOpen())
return ERR_UNEXPECTED;
// read(..., 0) will return 0, which indicates end-of-file.
DCHECK_GT(buf_len, 0);
return context_->Read(buf, buf_len, callback);
}
int FileStream::Write(IOBuffer* buf,
int buf_len,
const CompletionCallback& callback) {
if (!IsOpen())
return ERR_UNEXPECTED;
DCHECK_GE(buf_len, 0);
return context_->Write(buf, buf_len, callback);
}
int FileStream::Flush(const CompletionCallback& callback) {
if (!IsOpen())
return ERR_UNEXPECTED;
context_->Flush(callback);
return ERR_IO_PENDING;
}
} // namespace net
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