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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 "base/location.h"
#include "base/message_loop/message_loop_proxy.h"
#include "base/task_runner_util.h"
#include "base/threading/thread_restrictions.h"
#include "base/threading/worker_pool.h"
#include "net/base/file_stream_context.h"
#include "net/base/net_errors.h"
namespace net {
FileStream::FileStream(NetLog* net_log,
const scoped_refptr<base::TaskRunner>& task_runner)
: bound_net_log_(BoundNetLog::Make(net_log, NetLog::SOURCE_FILESTREAM)),
context_(new Context(bound_net_log_, task_runner)) {
bound_net_log_.BeginEvent(NetLog::TYPE_FILE_STREAM_ALIVE);
}
FileStream::FileStream(NetLog* net_log)
: bound_net_log_(BoundNetLog::Make(net_log, NetLog::SOURCE_FILESTREAM)),
context_(new Context(bound_net_log_,
base::WorkerPool::GetTaskRunner(true /* slow */))) {
bound_net_log_.BeginEvent(NetLog::TYPE_FILE_STREAM_ALIVE);
}
FileStream::FileStream(base::PlatformFile file,
int flags,
NetLog* net_log,
const scoped_refptr<base::TaskRunner>& task_runner)
: bound_net_log_(BoundNetLog::Make(net_log, NetLog::SOURCE_FILESTREAM)),
context_(new Context(base::File(file), bound_net_log_, task_runner)) {
bound_net_log_.BeginEvent(NetLog::TYPE_FILE_STREAM_ALIVE);
}
FileStream::FileStream(base::PlatformFile file, int flags, NetLog* net_log)
: bound_net_log_(BoundNetLog::Make(net_log, NetLog::SOURCE_FILESTREAM)),
context_(new Context(base::File(file), bound_net_log_,
base::WorkerPool::GetTaskRunner(true /* slow */))) {
bound_net_log_.BeginEvent(NetLog::TYPE_FILE_STREAM_ALIVE);
}
FileStream::FileStream(base::File file,
net::NetLog* net_log,
const scoped_refptr<base::TaskRunner>& task_runner)
: bound_net_log_(BoundNetLog::Make(net_log, NetLog::SOURCE_FILESTREAM)),
context_(new Context(file.Pass(), bound_net_log_, task_runner)) {
bound_net_log_.BeginEvent(NetLog::TYPE_FILE_STREAM_ALIVE);
}
FileStream::FileStream(base::File file, net::NetLog* net_log)
: bound_net_log_(BoundNetLog::Make(net_log, NetLog::SOURCE_FILESTREAM)),
context_(new Context(file.Pass(), bound_net_log_,
base::WorkerPool::GetTaskRunner(true /* slow */))) {
bound_net_log_.BeginEvent(NetLog::TYPE_FILE_STREAM_ALIVE);
}
FileStream::~FileStream() {
context_.release()->Orphan();
bound_net_log_.EndEvent(NetLog::TYPE_FILE_STREAM_ALIVE);
}
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_->OpenAsync(path, open_flags, callback);
return ERR_IO_PENDING;
}
int FileStream::Close(const CompletionCallback& callback) {
context_->CloseAsync(callback);
return ERR_IO_PENDING;
}
bool FileStream::IsOpen() const {
return context_->file().IsValid();
}
int FileStream::Seek(Whence whence,
int64 offset,
const Int64CompletionCallback& callback) {
if (!IsOpen())
return ERR_UNEXPECTED;
context_->SeekAsync(whence, offset, callback);
return ERR_IO_PENDING;
}
int FileStream::Read(IOBuffer* buf,
int buf_len,
const CompletionCallback& callback) {
if (!IsOpen())
return ERR_UNEXPECTED;
// read(..., 0) will return 0, which indicates end-of-file.
DCHECK_GT(buf_len, 0);
return context_->ReadAsync(buf, buf_len, callback);
}
int FileStream::Write(IOBuffer* buf,
int buf_len,
const CompletionCallback& callback) {
if (!IsOpen())
return ERR_UNEXPECTED;
// write(..., 0) will return 0, which indicates end-of-file.
DCHECK_GT(buf_len, 0);
return context_->WriteAsync(buf, buf_len, callback);
}
int FileStream::Flush(const CompletionCallback& callback) {
if (!IsOpen())
return ERR_UNEXPECTED;
context_->FlushAsync(callback);
return ERR_IO_PENDING;
}
const base::File& FileStream::GetFileForTesting() const {
return context_->file();
}
} // namespace net
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