1 // Copyright 2013 The Chromium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
5 #include "chrome/browser/chromeos/drive/local_file_reader.h"
8 #include "base/files/file_path.h"
9 #include "base/profiler/scoped_tracker.h"
10 #include "base/sequenced_task_runner.h"
11 #include "net/base/completion_callback.h"
12 #include "net/base/io_buffer.h"
13 #include "net/base/net_errors.h"
18 LocalFileReader::LocalFileReader(
19 base::SequencedTaskRunner* sequenced_task_runner)
20 : file_stream_(sequenced_task_runner),
21 weak_ptr_factory_(this) {
24 LocalFileReader::~LocalFileReader() {
27 void LocalFileReader::Open(const base::FilePath& file_path,
29 const net::CompletionCallback& callback) {
30 DCHECK(!callback.is_null());
31 int flags = base::File::FLAG_OPEN | base::File::FLAG_READ |
32 base::File::FLAG_ASYNC;
34 int rv = file_stream_.Open(file_path, flags,
35 Bind(&LocalFileReader::DidOpen,
36 weak_ptr_factory_.GetWeakPtr(),
38 DCHECK_EQ(rv, net::ERR_IO_PENDING);
41 void LocalFileReader::Read(net::IOBuffer* in_buffer,
43 const net::CompletionCallback& callback) {
44 DCHECK(!callback.is_null());
45 DCHECK(file_stream_.IsOpen());
46 int rv = file_stream_.Read(in_buffer, buffer_length, callback);
47 DCHECK_EQ(rv, net::ERR_IO_PENDING);
50 void LocalFileReader::DidOpen(const net::CompletionCallback& callback,
53 // TODO(vadimt): Remove ScopedTracker below once crbug.com/423948 is fixed.
54 tracked_objects::ScopedTracker tracking_profile(
55 FROM_HERE_WITH_EXPLICIT_FUNCTION("423948 LocalFileReader::DidOpen"));
58 return callback.Run(error);
60 int rv = file_stream_.Seek(base::File::FROM_BEGIN, offset,
61 Bind(&LocalFileReader::DidSeek,
62 weak_ptr_factory_.GetWeakPtr(),
64 DCHECK_EQ(rv, net::ERR_IO_PENDING);
67 void LocalFileReader::DidSeek(const net::CompletionCallback& callback,
70 callback.Run(error == offset ? net::OK : net::ERR_FAILED);