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85 lines
2.1 KiB
C++
85 lines
2.1 KiB
C++
// Copyright (c) 2012 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#include "net/base/file_stream.h"
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#include <utility>
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#include "net/base/file_stream_context.h"
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#include "net/base/net_errors.h"
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namespace net {
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FileStream::FileStream(const scoped_refptr<base::TaskRunner>& task_runner)
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: context_(std::make_unique<Context>(task_runner)) {}
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FileStream::FileStream(base::File file,
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const scoped_refptr<base::TaskRunner>& task_runner)
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: context_(std::make_unique<Context>(std::move(file), task_runner)) {}
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FileStream::~FileStream() {
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context_.release()->Orphan();
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}
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int FileStream::Open(const base::FilePath& path, int open_flags,
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const CompletionCallback& callback) {
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if (IsOpen()) {
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DLOG(FATAL) << "File is already open!";
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return ERR_UNEXPECTED;
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}
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DCHECK(open_flags & base::File::FLAG_ASYNC);
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context_->Open(path, open_flags, callback);
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return ERR_IO_PENDING;
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}
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int FileStream::Close(const CompletionCallback& callback) {
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context_->Close(callback);
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return ERR_IO_PENDING;
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}
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bool FileStream::IsOpen() const {
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return context_->IsOpen();
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}
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int FileStream::Seek(int64_t offset, const Int64CompletionCallback& callback) {
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if (!IsOpen())
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return ERR_UNEXPECTED;
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context_->Seek(offset, callback);
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return ERR_IO_PENDING;
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}
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int FileStream::Read(IOBuffer* buf,
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int buf_len,
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const CompletionCallback& callback) {
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if (!IsOpen())
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return ERR_UNEXPECTED;
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// read(..., 0) will return 0, which indicates end-of-file.
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DCHECK_GT(buf_len, 0);
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return context_->Read(buf, buf_len, callback);
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}
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int FileStream::Write(IOBuffer* buf,
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int buf_len,
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const CompletionCallback& callback) {
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if (!IsOpen())
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return ERR_UNEXPECTED;
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DCHECK_GE(buf_len, 0);
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return context_->Write(buf, buf_len, callback);
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}
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int FileStream::Flush(const CompletionCallback& callback) {
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if (!IsOpen())
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return ERR_UNEXPECTED;
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context_->Flush(callback);
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return ERR_IO_PENDING;
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}
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} // namespace net
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