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// Copyright 2015 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/blob/internal_blob_data.h"
#include <stddef.h>
#include <memory>
#include <utility>
#include "base/containers/hash_tables.h"
#include "base/metrics/histogram.h"
#include "storage/browser/blob/blob_data_item.h"
#include "storage/common/data_element.h"
namespace storage {
InternalBlobData::Builder::Builder() : data_(new InternalBlobData()) {
}
InternalBlobData::Builder::~Builder() {
}
void InternalBlobData::Builder::AppendSharedBlobItem(
scoped_refptr<ShareableBlobDataItem> item) {
DCHECK(item);
DCHECK(data_);
data_->items_.push_back(item);
}
void InternalBlobData::Builder::RemoveBlobFromShareableItems(
const std::string& blob_uuid) {
DCHECK(data_);
data_->RemoveBlobFromShareableItems(blob_uuid);
}
size_t InternalBlobData::Builder::GetNonsharedMemoryUsage() const {
DCHECK(data_);
return data_->GetUnsharedMemoryUsage();
}
std::unique_ptr<InternalBlobData> InternalBlobData::Builder::Build() {
DCHECK(data_);
return std::move(data_);
}
InternalBlobData::InternalBlobData() {
}
InternalBlobData::~InternalBlobData() {
}
const std::vector<scoped_refptr<ShareableBlobDataItem>>&
InternalBlobData::items() const {
return items_;
}
void InternalBlobData::RemoveBlobFromShareableItems(
const std::string& blob_uuid) {
for (auto& data_item : items_) {
data_item->referencing_blobs().erase(blob_uuid);
}
}
size_t InternalBlobData::GetUnsharedMemoryUsage() const {
size_t memory = 0;
base::hash_set<void*> seen_items;
for (const auto& data_item : items_) {
if (data_item->item()->type() != DataElement::TYPE_BYTES ||
data_item->referencing_blobs().size() > 1 ||
seen_items.find(data_item.get()) != seen_items.end()) {
continue;
}
memory += data_item->item()->length();
seen_items.insert(data_item.get());
}
return memory;
}
void InternalBlobData::GetMemoryUsage(size_t* total_memory,
size_t* unshared_memory) {
*total_memory = 0;
*unshared_memory = 0;
base::hash_set<void*> seen_items;
for (const auto& data_item : items_) {
if (data_item->item()->type() == DataElement::TYPE_BYTES) {
*total_memory += data_item->item()->length();
if (data_item->referencing_blobs().size() == 1 &&
seen_items.find(data_item.get()) == seen_items.end()) {
*unshared_memory += data_item->item()->length();
seen_items.insert(data_item.get());
}
}
}
}
} // namespace storage
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