| // Copyright 2013 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 "storage/browser/fileapi/quota/open_file_handle_context.h" |
| |
| #include <stdint.h> |
| |
| #include "base/files/file_util.h" |
| #include "storage/browser/fileapi/quota/quota_reservation_buffer.h" |
| |
| namespace storage { |
| |
| OpenFileHandleContext::OpenFileHandleContext( |
| const base::FilePath& platform_path, |
| QuotaReservationBuffer* reservation_buffer) |
| : initial_file_size_(0), |
| maximum_written_offset_(0), |
| append_mode_write_amount_(0), |
| platform_path_(platform_path), |
| reservation_buffer_(reservation_buffer) { |
| DCHECK(sequence_checker_.CalledOnValidSequencedThread()); |
| |
| base::GetFileSize(platform_path, &initial_file_size_); |
| maximum_written_offset_ = initial_file_size_; |
| } |
| |
| int64_t OpenFileHandleContext::UpdateMaxWrittenOffset(int64_t offset) { |
| DCHECK(sequence_checker_.CalledOnValidSequencedThread()); |
| if (offset <= maximum_written_offset_) |
| return 0; |
| |
| int64_t growth = offset - maximum_written_offset_; |
| maximum_written_offset_ = offset; |
| return growth; |
| } |
| |
| void OpenFileHandleContext::AddAppendModeWriteAmount(int64_t amount) { |
| DCHECK(sequence_checker_.CalledOnValidSequencedThread()); |
| append_mode_write_amount_ += amount; |
| } |
| |
| int64_t OpenFileHandleContext::GetEstimatedFileSize() const { |
| DCHECK(sequence_checker_.CalledOnValidSequencedThread()); |
| return maximum_written_offset_ + append_mode_write_amount_; |
| } |
| |
| int64_t OpenFileHandleContext::GetMaxWrittenOffset() const { |
| DCHECK(sequence_checker_.CalledOnValidSequencedThread()); |
| return maximum_written_offset_; |
| } |
| |
| OpenFileHandleContext::~OpenFileHandleContext() { |
| DCHECK(sequence_checker_.CalledOnValidSequencedThread()); |
| |
| // TODO(tzik): Optimize this for single operation. |
| |
| int64_t file_size = 0; |
| base::GetFileSize(platform_path_, &file_size); |
| int64_t usage_delta = file_size - initial_file_size_; |
| |
| // |reserved_quota_consumption| may be greater than the recorded file growth |
| // when a plugin crashed before reporting its consumption. |
| // In this case, the reserved quota for the plugin should be handled as |
| // consumed quota. |
| int64_t reserved_quota_consumption = |
| std::max(GetEstimatedFileSize(), file_size) - initial_file_size_; |
| |
| reservation_buffer_->CommitFileGrowth( |
| reserved_quota_consumption, usage_delta); |
| reservation_buffer_->DetachOpenFileHandleContext(this); |
| } |
| |
| } // namespace storage |