net cleanup: Remove unnecessary namespace prefixes.
[chromium-blink-merge.git] / storage / browser / fileapi / quota / open_file_handle_context.cc
bloba775865a33f4a2b120c1b9274af51adc9c9a5778
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 "storage/browser/fileapi/quota/open_file_handle_context.h"
7 #include "base/files/file_util.h"
8 #include "storage/browser/fileapi/quota/quota_reservation_buffer.h"
10 namespace storage {
12 OpenFileHandleContext::OpenFileHandleContext(
13 const base::FilePath& platform_path,
14 QuotaReservationBuffer* reservation_buffer)
15 : initial_file_size_(0),
16 maximum_written_offset_(0),
17 append_mode_write_amount_(0),
18 platform_path_(platform_path),
19 reservation_buffer_(reservation_buffer) {
20 DCHECK(sequence_checker_.CalledOnValidSequencedThread());
22 base::GetFileSize(platform_path, &initial_file_size_);
23 maximum_written_offset_ = initial_file_size_;
26 int64 OpenFileHandleContext::UpdateMaxWrittenOffset(int64 offset) {
27 DCHECK(sequence_checker_.CalledOnValidSequencedThread());
28 if (offset <= maximum_written_offset_)
29 return 0;
31 int64 growth = offset - maximum_written_offset_;
32 maximum_written_offset_ = offset;
33 return growth;
36 void OpenFileHandleContext::AddAppendModeWriteAmount(int64 amount) {
37 DCHECK(sequence_checker_.CalledOnValidSequencedThread());
38 append_mode_write_amount_ += amount;
41 int64 OpenFileHandleContext::GetEstimatedFileSize() const {
42 DCHECK(sequence_checker_.CalledOnValidSequencedThread());
43 return maximum_written_offset_ + append_mode_write_amount_;
46 int64 OpenFileHandleContext::GetMaxWrittenOffset() const {
47 DCHECK(sequence_checker_.CalledOnValidSequencedThread());
48 return maximum_written_offset_;
51 OpenFileHandleContext::~OpenFileHandleContext() {
52 DCHECK(sequence_checker_.CalledOnValidSequencedThread());
54 // TODO(tzik): Optimize this for single operation.
56 int64 file_size = 0;
57 base::GetFileSize(platform_path_, &file_size);
58 int64 usage_delta = file_size - initial_file_size_;
60 // |reserved_quota_consumption| may be greater than the recorded file growth
61 // when a plugin crashed before reporting its consumption.
62 // In this case, the reserved quota for the plugin should be handled as
63 // consumed quota.
64 int64 reserved_quota_consumption =
65 std::max(GetEstimatedFileSize(), file_size) - initial_file_size_;
67 reservation_buffer_->CommitFileGrowth(
68 reserved_quota_consumption, usage_delta);
69 reservation_buffer_->DetachOpenFileHandleContext(this);
72 } // namespace storage